English Vocabulary · Grade 8 Live Review Preview

8th Grade Vocabulary Words

Eighth-grade readers move toward high-school-level analysis across literature, argument, research, physical and life science, algebra, economics, history, and civics. This level strengthens precise Tier II and cross-curricular vocabulary while emphasizing context, analogy, word relationships, Greek and Latin roots, multiple meanings, source judgment, and evidence-based communication.

This independently authored 500-word beta curriculum is arranged in twenty pages of twenty-five words each. Words 1–300 include five cloze questions per page; words 301–500 remain fully visible and editable as list pages while the expanded practice layer is developed. Each row includes a subject-field label and an editable word-study note about a transparent affix, compound structure, capitalization, or dictionary base form. The cited Grade 8 resources calibrate difficulty and vocabulary-study skills only; all learner-facing definitions, examples, quizzes, and descriptions are original KSSR copy.

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Complete text list

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Page 1: words 1–25

Vocabulary page 1
#	Word	Details	Meaning	Sample sentence
1	abet	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: abet is the dictionary headword; compare its inflected or derived forms in context.	1. xúi bẩy 2. xúi giục 3. khích	A driver who knowingly helps thieves escape may abet the crime.
2	accord	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: accord is the dictionary headword; compare its inflected or derived forms in context.	1. đồng 2. lòng 3. đồng ý	The two councils reached an accord after weeks of negotiation.
3	allot	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: allot is the dictionary headword; compare its inflected or derived forms in context.	1. Phân công 2. định	The schedule will allot twenty minutes to each presentation.
4	amiss	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: amiss is the dictionary headword; compare its inflected or derived forms in context.	không ổn	When the alarm stayed silent during the drill, the custodian knew something was amiss.
5	apprehend	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: apprehend is the dictionary headword; compare its inflected or derived forms in context.	1. Bắt 2. tóm 3. nắm lấy	Investigators used the security footage to apprehend the suspect.
6	assail	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: assail is the dictionary headword; compare its inflected or derived forms in context.	1. Tấn công 2. xông 3. đánh	Opponents assail the proposal for ignoring the cost of repairs.
7	atrocity	noun Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	1. sự tàn ác 2. sự tàn bạo 3. Tính	Survivor testimony documented the wartime atrocity.
8	avail	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: avail is the dictionary headword; compare its inflected or derived forms in context.	1. Điều 2. có lợi 3. ích lợi	The crew pulled at the jammed door to no avail.
9	avid	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: avid is the dictionary headword; compare its inflected or derived forms in context.	khao khát	An avid birder can recognize many species by their calls.
10	awry	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: awry is the dictionary headword; compare its inflected or derived forms in context.	xiên	The expedition went awry when floodwater erased the trail.
11	balmy	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: balmy is the dictionary headword; compare its inflected or derived forms in context.	êm dịu	A balmy breeze made the spring evening comfortable.
12	banter	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: banter is the dictionary headword; compare its inflected or derived forms in context.	1. Sự 2. nói đùa 3. giễu cợt	The teammates exchanged light banter while waiting for the match.
13	bizarre	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: bizarre is the dictionary headword; compare its inflected or derived forms in context.	kỳ quái	The bizarre sculpture combines a bicycle wheel with a glass umbrella.
14	blasé	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: blasé is the dictionary headword; compare its inflected or derived forms in context.	báng bổ	After attending dozens of premieres, the critic seemed blasé about meeting celebrities.
15	bonanza	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: bonanza is the dictionary headword; compare its inflected or derived forms in context.	1. Sự 2. phát đạt 3. thịnh vượng	The discovery of rare minerals created a temporary bonanza for the town.
16	bountiful	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: bountiful is the dictionary headword; compare its inflected or derived forms in context.	phong phú	Regular rain produced a bountiful apple harvest.
17	cache	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: cache is the dictionary headword; compare its inflected or derived forms in context.	1. bộ nhớ đệm 2. vùng nhớ đệm 3. Nơi	Hikers found an emergency cache containing blankets and water.
18	capacious	adjective Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	có sức chứa	The capacious auditorium can seat the entire school.
19	citadel	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: citadel is the dictionary headword; compare its inflected or derived forms in context.	1. thành luỹ 2. thành trì 3. thành quách	The ancient citadel overlooks the harbor from a rocky hill.
20	clad	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: clad is the dictionary headword; compare its inflected or derived forms in context.	1. Mặc 2. quần áo	Workers clad in reflective jackets directed traffic around the sinkhole.
21	commemorate	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: commemorate is the dictionary headword; compare its inflected or derived forms in context.	1. kỷ niệm 2. tưởng nhớ 3. tưởng niệm	The mural will commemorate the nurses who served during the epidemic.
22	component	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: component is the dictionary headword; compare its inflected or derived forms in context.	1. bộ phận 2. 部份	The battery is a crucial component of the emergency radio.
23	confiscate	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: confiscate is the dictionary headword; compare its inflected or derived forms in context.	1. tịch thâu 2. tịch thu 3. sung công	Airport officers may confiscate items that violate safety rules.
24	connoisseur	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: connoisseur is the dictionary headword; compare its inflected or derived forms in context.	1. Người 2. sành sỏi 3. thành thạo	A tea connoisseur can distinguish subtle differences in aroma.
25	conservative	adjective Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	bảo thủ	Engineers used a conservative estimate for the bridge's safe load.

A Bizarre Festival

Reading practice for pages 1–3. Five relevant words are highlighted.

English reading

At a bizarre film festival, several directors reach an accord to share equipment. Their cooperation does not abet cheating; every entry remains independent. Reviewers who once seemed blasé become excited when ticket sales create a bonanza for the town library.

Vietnamese translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What agreement do the directors reach?

They reach an accord to share equipment.

2. Does sharing equipment abet cheating?

No, each entry remains independent.

3. Who benefits from the bonanza?

The town library benefits.

Cloze vocabulary quiz

1. The ___ sculpture combines a bicycle wheel with a glass umbrella.

Answer: bizarre

2. A driver who knowingly helps thieves escape may ___ the crime.

Answer: abet

3. After attending dozens of premieres, the critic seemed ___ about meeting celebrities.

Answer: blasé

4. The two councils reached an ___ after weeks of negotiation.

Answer: accord

5. The discovery of rare minerals created a temporary ___ for the town.

Answer: bonanza

Page 2: words 26–50

Vocabulary page 2
#	Word	Details	Meaning	Sample sentence
26	crusade	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: crusade is the dictionary headword; compare its inflected or derived forms in context.	1. Cuộc 2. viễn chinh 3. chữ	Her crusade against food waste persuaded several restaurants to donate leftovers.
27	deceptive	adjective Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	lừa dối	The calm surface was deceptive because a strong current flowed underneath.
28	decipher	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: decipher is the dictionary headword; compare its inflected or derived forms in context.	1. Giải 2. đọc 3. đoán	A linguist helped decipher the faded symbols on the tablet.
29	decree	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: decree is the dictionary headword; compare its inflected or derived forms in context.	1. sắc lệnh 2. chiếu chỉ	The royal decree opened the port to foreign merchants.
30	deface	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: deface is the dictionary headword; compare its inflected or derived forms in context.	1. xấu 2. mất 3. vẻ	Vandals tried to deface the memorial with paint.
31	defect	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: defect is the dictionary headword; compare its inflected or derived forms in context.	1. tật 2. lỗi 3. Thiếu sót	A tiny defect in the seal allowed water to enter the container.
32	deplore	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: deplore is the dictionary headword; compare its inflected or derived forms in context.	1. Phàn nàn 2. lấy làm 3. tiếc	Community leaders deplore the destruction of the historic theater.
33	deploy	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: deploy is the dictionary headword; compare its inflected or derived forms in context.	1. Dàn 2. quân 3. dàn trận	Firefighters deploy portable pumps along the flooded street.
34	desist	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: desist is the dictionary headword; compare its inflected or derived forms in context.	1. Ngừng 2. thôi 3. nghỉ	The referee ordered the players to desist from arguing.
35	deter	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: deter is the dictionary headword; compare its inflected or derived forms in context.	1. Ngăn cản 2. ngăn chặn 3. cản trở	Bright lighting can deter theft near the station.
36	dialect	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: dialect is the dictionary headword; compare its inflected or derived forms in context.	1. thổ ngữ 2. 土語 3. phương ngữ	The novel preserves the coastal dialect in its dialogue.
37	dire	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: dire is the dictionary headword; compare its inflected or derived forms in context.	thảm khốc	The clinic faced a dire shortage of clean water.
38	disgruntled	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: disgruntled is the dictionary headword; compare its inflected or derived forms in context.	bất mãn	Disgruntled customers demanded refunds after the concert was canceled.
39	dispatch	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: dispatch is the dictionary headword; compare its inflected or derived forms in context.	1. Gửi 2. đi 3. sai phái	The control center will dispatch a repair crew before dawn.
40	disposition	noun Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ition commonly forms a noun naming an action, process, or result.	1. Sự 2. sắp xếp 3. sắp đặt	Her patient disposition makes nervous animals feel safe.
41	doctrine	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: doctrine is the dictionary headword; compare its inflected or derived forms in context.	1. giáo lý 2. 教理 3. chủ nghĩa	The movement's doctrine emphasized nonviolent resistance.
42	dub	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: dub is the dictionary headword; compare its inflected or derived forms in context.	1. Phong tước 2. hiệp sĩ 3. lấy	Reporters dub the rescued owl “Lucky” after its recovery.
43	elite	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: elite is the dictionary headword; compare its inflected or derived forms in context.	1. giới tinh hoa 2. giới thượng lưu	Only the elite of the sport qualify for the final race.
44	embargo	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: embargo is the dictionary headword; compare its inflected or derived forms in context.	1. cấm vận 2. Lệnh cấm vận	The embargo prevented companies from exporting weapons to the regime.
45	embark	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: embark is the dictionary headword; compare its inflected or derived forms in context.	1. lên 2. tàu	The researchers embark on a five-year study of coastal erosion.
46	endeavor	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: endeavor is the dictionary headword; compare its inflected or derived forms in context.	1. cố gắng 2. như) endeavour	Restoring the wetland became a shared endeavor among residents and scientists.
47	enigma	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: enigma is the dictionary headword; compare its inflected or derived forms in context.	bí	The source of the mysterious radio signal remains an enigma.
48	epoch	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: epoch is the dictionary headword; compare its inflected or derived forms in context.	1. thời đại 2. 時代 3. bắt đầu	The invention of movable type began a new epoch in communication.
49	eventful	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: eventful is the dictionary headword; compare its inflected or derived forms in context.	đầy sự kiện	The eventful voyage included a storm, a rescue, and an unexpected discovery.
50	exceptional	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: exceptional is the dictionary headword; compare its inflected or derived forms in context.	đặc biệt	Her exceptional memory allowed her to recite the entire speech.

Page 2 vocabulary review

Review five selected words from page 2.

Cloze vocabulary quiz

1. ___ customers demanded refunds after the concert was canceled.

Answer: disgruntled

2. Her ___ against food waste persuaded several restaurants to donate leftovers.

Answer: crusade

3. The control center will ___ a repair crew before dawn.

Answer: dispatch

4. The calm surface was ___ because a strong current flowed underneath.

Answer: deceptive

5. Her patient ___ makes nervous animals feel safe.

Answer: disposition

Page 3: words 51–75

Vocabulary page 3
#	Word	Details	Meaning	Sample sentence
51	excruciating	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: excruciating is the dictionary headword; compare its inflected or derived forms in context.	đau đớn	The runner stopped when an excruciating pain spread through his ankle.
52	fastidious	adjective Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	khó tính	The fastidious conservator removed dust from the painting one grain at a time.
53	fend	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: fend is the dictionary headword; compare its inflected or derived forms in context.	1. Đánh lui 2. đẩy lui 3. đẩy xa	Thick bark helps the tree fend off insects.
54	ferret	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: ferret is the dictionary headword; compare its inflected or derived forms in context.	1. Săn 2. chồn 3. sương	The auditor will ferret out errors in the complicated accounts.
55	flair	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: flair is the dictionary headword; compare its inflected or derived forms in context.	1. thính 2. tài 3. nhận thấy	Mina has a flair for explaining difficult equations with simple diagrams.
56	flustered	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: flustered is the dictionary headword; compare its inflected or derived forms in context.	bối rối	The unexpected question left the speaker flustered for a moment.
57	foreboding	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: foreboding is the dictionary headword; compare its inflected or derived forms in context.	báo trước	Dark clouds filled the sailors with foreboding.
58	forfeit	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: forfeit is the dictionary headword; compare its inflected or derived forms in context.	1. Tiền 2. phạt 3. bồi thường	A team that uses an ineligible player may forfeit the match.
59	fortify	verb Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ify commonly forms a verb meaning to make or become.	1. Củng cố 2. vững chắc 3. mạnh	Sandbags fortify the riverbank before the storm.
60	foster	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: foster is the dictionary headword; compare its inflected or derived forms in context.	1. Nuôi dưỡng 2. nuôi nấng	The exchange program aims to foster respect between the two communities.
61	gaunt	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: gaunt is the dictionary headword; compare its inflected or derived forms in context.	gầy gò	After weeks without enough food, the abandoned dog looked gaunt.
62	gingerly	adverb Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ly commonly forms an adverb describing how an action occurs.	thận trọng	She stepped gingerly across the icy porch.
63	glut	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: glut is the dictionary headword; compare its inflected or derived forms in context.	1. Cái 2. chêm 3. gỗ	A glut of tomatoes caused prices at the market to fall.
64	grapple	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: grapple is the dictionary headword; compare its inflected or derived forms in context.	1. Móc 2. bằng 3. móc sắt	City planners grapple with how to add housing without removing parks.
65	grope	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: grope is the dictionary headword; compare its inflected or derived forms in context.	1. Sờ soạng 2. tìm	In the dark tent, Leo had to grope for the flashlight.
66	gullible	adjective Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ible means capable of, suitable for, or able to be affected.	cả tin	A gullible reader may trust the fake advertisement.
67	haggard	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: haggard is the dictionary headword; compare its inflected or derived forms in context.	xanh xao	The haggard rescue workers finally rested after the overnight search.
68	haven	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: haven is the dictionary headword; compare its inflected or derived forms in context.	1. Bến tàu 2. cảng	The sheltered bay became a haven for boats during the storm.
69	heritage	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: heritage is the dictionary headword; compare its inflected or derived forms in context.	1. di sản 2. 遺產 3. Tài sản	The festival celebrates the region's musical heritage.
70	hindrance	noun Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	1. vật cản 2. cản trở	A broken compass became a serious hindrance in the fog.
71	humane	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: humane is the dictionary headword; compare its inflected or derived forms in context.	nhân đạo	The shelter follows humane practices when caring for injured wildlife.
72	incense	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: incense is the dictionary headword; compare its inflected or derived forms in context.	1. Đốt 2. cúng 3. thắp	The decision to close the clinic will incense many residents.
73	infinite	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: infinite is the dictionary headword; compare its inflected or derived forms in context.	1. vô hạn 2. bất tận	A mathematical line extends an infinite distance in both directions.
74	instill	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: instill is the dictionary headword; compare its inflected or derived forms in context.	1. Truyền đạt 2. thấm nhuần 3. dần	Daily practice can instill confidence in a new musician.
75	institute	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: institute is the dictionary headword; compare its inflected or derived forms in context.	1. Thành lập 2. lập 3. nên	The school will institute a recycling policy next term.

Page 3 vocabulary review

Review five selected words from page 3.

Cloze vocabulary quiz

1. The runner stopped when an ___ pain spread through his ankle.

Answer: excruciating

2. City planners ___ with how to add housing without removing parks.

Answer: grapple

3. The ___ conservator removed dust from the painting one grain at a time.

Answer: fastidious

4. In the dark tent, Leo had to ___ for the flashlight.

Answer: grope

5. Thick bark helps the tree ___ off insects.

Answer: fend

Page 4: words 76–100

Vocabulary page 4
#	Word	Details	Meaning	Sample sentence
76	intervene	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: intervene is the dictionary headword; compare its inflected or derived forms in context.	1. vào 2. can thiệp	A mediator may intervene before the disagreement becomes violent.
77	languish	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: languish is the dictionary headword; compare its inflected or derived forms in context.	1. Ốm yếu 2. tiều 3. tuỵ	The unfinished bill may languish in committee for months.
78	legendary	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: legendary is the dictionary headword; compare its inflected or derived forms in context.	1. Truyện 2. cổ tích 3. truyền thuyết	The goalkeeper's legendary save is still discussed decades later.
79	luminous	adjective Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	sáng	Luminous paint marks the emergency exit in darkness.
80	mien	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: mien is the dictionary headword; compare its inflected or derived forms in context.	1. Dáng 2. phong cách	Despite the tense hearing, the witness maintained a calm mien.
81	millennium	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: millennium is the dictionary headword; compare its inflected or derived forms in context.	1. thiên niên kỷ 2. nghìn năm 3. mười	The temple has stood for nearly a millennium.
82	minimize	verb Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ize commonly forms a verb meaning to make, become, or apply.	1. Giảm 2. đến mức 3. tối thiểu	Protective covers minimize damage from dust and sunlight.
83	muster	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: muster is the dictionary headword; compare its inflected or derived forms in context.	1. Tập 2. họp 3. tập trung	The exhausted climber had to muster enough strength for the final ascent.
84	onslaught	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: onslaught is the dictionary headword; compare its inflected or derived forms in context.	1. công kích 2. dữ dội 3. tấn công	The seawall absorbed the first onslaught of storm waves.
85	ornate	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: ornate is the dictionary headword; compare its inflected or derived forms in context.	văn hoa	An ornate border of vines surrounds the manuscript.
86	ovation	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: ovation is the dictionary headword; compare its inflected or derived forms in context.	1. pháo tay 2. Sự 3. hoan hô	The orchestra received a standing ovation after the final movement.
87	overt	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: overt is the dictionary headword; compare its inflected or derived forms in context.	công khai	The policy faced overt resistance from several council members.
88	panorama	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: panorama is the dictionary headword; compare its inflected or derived forms in context.	1. toàn cảnh 2. Bức tranh 3. cuộn	From the summit, hikers saw a panorama of lakes and forests.
89	phenomenon	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: phenomenon is the dictionary headword; compare its inflected or derived forms in context.	hiện tượng	Bioluminescence is a natural phenomenon in which organisms produce light.
90	pioneer	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: pioneer is the dictionary headword; compare its inflected or derived forms in context.	1. Đội 2. tiên phong 3. mở đường	The engineer became a pioneer in low-cost water purification.
91	pivotal	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: pivotal is the dictionary headword; compare its inflected or derived forms in context.	then chốt	The witness's photograph played a pivotal role in the investigation.
92	plunder	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: plunder is the dictionary headword; compare its inflected or derived forms in context.	1. Cướp bóc 2. tước đoạt 3. cưỡng đoạt	Invading soldiers tried to plunder the town's stores.
93	porous	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: porous is the dictionary headword; compare its inflected or derived forms in context.	xốp	Porous rock absorbs water more readily than solid granite.
94	preposterous	adjective Study Field: Grade 8 precise high-utility word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	vô lý	The rumor that the moon had disappeared was preposterous.
95	prodigy	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: prodigy is the dictionary headword; compare its inflected or derived forms in context.	1. Người 2. thần kỳ 3. vật	The piano prodigy composed her first concerto at age twelve.
96	proficient	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: proficient is the dictionary headword; compare its inflected or derived forms in context.	thành thạo	A proficient coder can identify the source of the error quickly.
97	pseudonym	noun Study Field: Grade 8 precise high-utility word Word study: Base-form focus: pseudonym is the dictionary headword; compare its inflected or derived forms in context.	1. biệt hiệu 2. 別號 3. bút danh	The novelist published the mystery under a pseudonym.
98	pungent	adjective Study Field: Grade 8 precise high-utility word Word study: Base-form focus: pungent is the dictionary headword; compare its inflected or derived forms in context.	1. hăng 2. gắt	The pungent smoke from the burning rubber made our eyes water.
99	rankle	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: rankle is the dictionary headword; compare its inflected or derived forms in context.	1. Viêm 2. sưng tấy	The unfair accusation continued to rankle him years later.
100	rebuke	verb Study Field: Grade 8 precise high-utility word Word study: Base-form focus: rebuke is the dictionary headword; compare its inflected or derived forms in context.	1. Khiển trách 2. quở trách	The judge will rebuke any lawyer who ignores the court's rules.

The Legendary Wetland

Reading practice for pages 4–6. Five relevant words are highlighted.

English reading

A pioneer ecologist records a rare migration phenomenon in a wetland that later begins to languish. Her legendary notebooks show where birds once nested. Conservationists intervene by restoring water flow and native plants.

Vietnamese translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What did the pioneer record?

She recorded a migration phenomenon.

2. What happens to the wetland?

The wetland begins to languish.

3. How do conservationists intervene?

They restore water flow and native plants.

Cloze vocabulary quiz

1. A mediator may ___ before the disagreement becomes violent.

Answer: intervene

2. Bioluminescence is a natural ___ in which organisms produce light.

Answer: phenomenon

3. The unfinished bill may ___ in committee for months.

Answer: languish

4. The engineer became a ___ in low-cost water purification.

Answer: pioneer

5. The goalkeeper's ___ save is still discussed decades later.

Answer: legendary

Page 5: words 101–125

Vocabulary page 5
#	Word	Details	Meaning	Sample sentence
101	argumentation	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	Luận chứng	Effective argumentation connects each reason to reliable evidence.
102	substantiation	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	chứng minh	The editor requested substantiation for the article's surprising statistic.
103	interpretive	adjective Study Field: Grade 8 language and literature word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	diễn giải	Her interpretive essay examines how the storm symbolizes fear.
104	analytical	adjective Study Field: Grade 8 language and literature word Word study: Base-form focus: analytical is the dictionary headword; compare its inflected or derived forms in context.	phân tích	An analytical reader compares the author's claim with the supporting data.
105	intertextuality	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	tính liên văn bản	The novel's allusion to an ancient myth creates intertextuality.
106	apostrophe	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: apostrophe is the dictionary headword; compare its inflected or derived forms in context.	Hô ngữ	The poet uses apostrophe when she speaks directly to the moon.
107	metonymy	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: metonymy is the dictionary headword; compare its inflected or derived forms in context.	hoán dụ	In the phrase “the crown announced,” crown is metonymy for the monarch.
108	synecdoche	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: synecdoche is the dictionary headword; compare its inflected or derived forms in context.	1. cải dung 2. phép	Calling workers “hired hands” uses synecdoche because hands represent people.
109	foreshadowing	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: foreshadowing is the dictionary headword; compare its inflected or derived forms in context.	điềm báo	The cracked compass provides foreshadowing of the travelers' coming trouble.
110	foil	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: foil is the dictionary headword; compare its inflected or derived forms in context.	Lá	The cautious brother serves as a foil to the reckless hero.
111	revision	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	1. Sự 2. lại 3. xét lại	During revision, Lila moved her strongest evidence closer to the claim.
112	editing	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: editing is the dictionary headword; compare its inflected or derived forms in context.	1. sửa đổi 2. chỉnh sửa 3. biên soạn	Careful editing removed three sentence fragments from the report.
113	colloquialism	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. Lối 2. nói 3. thông tục	The dialogue includes the colloquialism “no big deal” to sound natural.
114	morphology	noun Study Field: Grade 8 language and literature word Word study: Root and suffix focus: -logy means the study of a subject.	1. hình thái học 2. Hình 3. thái	Morphology helps readers connect predict, prediction, and predictable.
115	semantics	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: semantics is the dictionary headword; compare its inflected or derived forms in context.	1. ngữ nghĩa học 2. 語義學	A lesson in semantics showed how context changes the meaning of light.
116	phonology	noun Study Field: Grade 8 language and literature word Word study: Root and suffix focus: -logy means the study of a subject.	1. âm vị học 2. vị 3. học	Phonology explains why certain sound combinations are common in English.
117	lexicography	noun Study Field: Grade 8 language and literature word Word study: Root and suffix focus: -graphy relates to writing, recording, or describing.	1. từ điển học 2. 詞典學	Modern lexicography uses large language collections to track word usage.
118	homophone	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: homophone is the dictionary headword; compare its inflected or derived forms in context.	1. từ đồng âm 2. Từ 3. phát	Flour is a homophone of flower.
119	homograph	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: homograph is the dictionary headword; compare its inflected or derived forms in context.	1. Từ 2. chữ	The word bow is a homograph because it can name a ribbon or an act of bending.
120	inflection	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. Chỗ 2. góc	Adding -ed is an inflection that marks past tense in walked.
121	derivation	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. Sự 2. bắt 3. nguồn	The derivation of happiness adds a suffix to happy.
122	repetition	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ition commonly forms a noun naming an action, process, or result.	1. nhắc lại 2. lặp lại 3. điều	The speech uses repetition to make its central promise memorable.
123	inversion	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	1. lộn ngược 2. ngược	The line “Bright was the moon” uses inversion.
124	rhetorical-question	noun Study Field: Grade 8 language and literature word Word study: Term structure: rhetorical + question. Study the complete expression as one field-specific unit.	câu hỏi tu từ	“Who would choose polluted water?” is a rhetorical-question that challenges the audience.
125	call-to-action	noun Study Field: Grade 8 language and literature word Word study: Term structure: call + to + action. Study the complete expression as one field-specific unit.	kêu gọi hành động	The final paragraph includes a call-to-action asking readers to conserve water.

Page 5 vocabulary review

Review five selected words from page 5.

Cloze vocabulary quiz

1. ___ helps readers connect predict, prediction, and predictable.

Answer: morphology

2. The editor requested ___ for the article's surprising statistic.

Answer: substantiation

3. A lesson in ___ showed how context changes the meaning of light.

Answer: semantics

4. Her ___ essay examines how the storm symbolizes fear.

Answer: interpretive

5. ___ explains why certain sound combinations are common in English.

Answer: phonology

Page 6: words 126–150

Vocabulary page 6
#	Word	Details	Meaning	Sample sentence
126	audience	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.	1. khán giả 2. quý vị 3. Những	The writer defines technical terms because the audience includes beginners.
127	purpose	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: purpose is the dictionary headword; compare its inflected or derived forms in context.	1. Mục đích 2. ý định	The article's purpose is to explain how vaccines train the immune system.
128	format	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: format is the dictionary headword; compare its inflected or derived forms in context.	Định dạng của tài liệu	A timeline is an effective format for showing a sequence of events.
129	structure	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: structure is the dictionary headword; compare its inflected or derived forms in context.	1. kết cấu 2. cấu trúc	The essay's compare-and-contrast structure makes the differences easy to follow.
130	organization	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	1. tổ chức 2. cấu tạo	Clear organization guides readers from the problem to the proposed solution.
131	classification	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. sự phân loại 2. Sự 3. phân loại	The classification of rocks depends on how they formed.
132	counterargument	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	phản biện	The essay answers the counterargument that the project costs too much.
133	warrant	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: warrant is the dictionary headword; compare its inflected or derived forms in context.	1. cho phép 2. giấy phép	The writer's warrant connects lower emissions with improved public health.
134	relevance	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	1. Sự 2. thích đáng 3. thích hợp	The judge questioned the relevance of testimony about an unrelated event.
135	publication	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	công bố	The scientific publication requires every study to describe its methods.
136	manuscript	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: manuscript is the dictionary headword; compare its inflected or derived forms in context.	thủ bản	The author sent the completed manuscript to her editor.
137	editorial	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: editorial is the dictionary headword; compare its inflected or derived forms in context.	1. bài xã luận 2. xã luận	The newspaper's editorial argues for safer bicycle lanes.
138	anthology	noun Study Field: Grade 8 language and literature word Word study: Root and suffix focus: -logy means the study of a subject.	1. văn tuyển 2. Hợp tuyển	Our anthology includes folktales from twelve regions.
139	précis	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: précis is the dictionary headword; compare its inflected or derived forms in context.	chính xác	His précis reduces the lengthy report to one accurate paragraph.
140	synopsis	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: synopsis is the dictionary headword; compare its inflected or derived forms in context.	1. tóm tắt 2. Bảng 3. toát yếu	The program provides a synopsis of the play before the performance.
141	bildungsroman	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: bildungsroman is the dictionary headword; compare its inflected or derived forms in context.	1. bildungsroman 2. tiểu thuyết 3. theo dõi	The bildungsroman traces how its young narrator develops courage and judgment.
142	epistolary	adjective Study Field: Grade 8 language and literature word Word study: Base-form focus: epistolary is the dictionary headword; compare its inflected or derived forms in context.	biên thơ	The epistolary novel reveals the mystery through a series of emails.
143	historical-fiction	noun Study Field: Grade 8 language and literature word Word study: Term structure: historical + fiction. Study the complete expression as one field-specific unit.	tiểu thuyết lịch sử	The historical-fiction novel places its heroine in a wartime hospital.
144	speculative-fiction	noun Study Field: Grade 8 language and literature word Word study: Term structure: speculative + fiction. Study the complete expression as one field-specific unit.	tiểu thuyết suy đoán	The speculative-fiction story asks what might happen if memories could be traded.
145	magical-realism	noun Study Field: Grade 8 language and literature word Word study: Term structure: magical + realism. Study the complete expression as one field-specific unit.	chủ nghĩa hiện thực huyền ảo	In the magical-realism tale, the family accepts a floating house without surprise.
146	stream-of-consciousness	noun Study Field: Grade 8 language and literature word Word study: Term structure: stream + of + consciousness. Study the complete expression as one field-specific unit.	dòng ý thức	The stream-of-consciousness passage shifts rapidly among memories, sounds, and worries.
147	interior-monologue	noun Study Field: Grade 8 language and literature word Word study: Term structure: interior + monologue. Study the complete expression as one field-specific unit.	độc thoại nội tâm	The interior-monologue reveals doubts that the character never speaks aloud.
148	free-verse	noun Study Field: Grade 8 language and literature word Word study: Term structure: free + verse. Study the complete expression as one field-specific unit.	thơ tự do	The free-verse poem varies its line lengths to imitate ocean waves.
149	blank-verse	noun Study Field: Grade 8 language and literature word Word study: Term structure: blank + verse. Study the complete expression as one field-specific unit.	thơ trống	The dramatist uses blank-verse for the ruler's serious speech.
150	sonnet	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: sonnet is the dictionary headword; compare its inflected or derived forms in context.	1. Bài thơ 2. xonê 3. câu	The sonnet turns from loss to hope in its final lines.

Page 6 vocabulary review

Review five selected words from page 6.

Cloze vocabulary quiz

1. His ___ reduces the lengthy report to one accurate paragraph.

Answer: précis

2. The article's ___ is to explain how vaccines train the immune system.

Answer: purpose

3. The program provides a ___ of the play before the performance.

Answer: synopsis

4. A timeline is an effective ___ for showing a sequence of events.

Answer: format

5. The ___ traces how its young narrator develops courage and judgment.

Answer: bildungsroman

Page 7: words 151–175

Vocabulary page 7
#	Word	Details	Meaning	Sample sentence
151	ode	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: ode is the dictionary headword; compare its inflected or derived forms in context.	Thơ ca ngợi	The poet wrote an ode celebrating the endurance of an old oak tree.
152	elegy	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: elegy is the dictionary headword; compare its inflected or derived forms in context.	1. Khúc 2. bi thương	The elegy remembers the fisher and the coast he loved.
153	ballad	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: ballad is the dictionary headword; compare its inflected or derived forms in context.	1. dân ca 2. 民歌 3. Khúc	The traditional ballad recounts a sailor's dangerous voyage.
154	haiku	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: haiku is the dictionary headword; compare its inflected or derived forms in context.	1. Bài thơ 2. ngắn 3. người	Her haiku describes one raindrop trembling on a leaf.
155	limerick	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: limerick is the dictionary headword; compare its inflected or derived forms in context.	1. Bài thơ 2. hài hước 3. năm	The limerick ends with a playful rhyme about a confused chef.
156	lyric	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: lyric is the dictionary headword; compare its inflected or derived forms in context.	1. Bài thơ 2. trữ tình	The lyric explores the speaker's longing for home.
157	narrative-poem	noun Study Field: Grade 8 language and literature word Word study: Term structure: narrative + poem. Study the complete expression as one field-specific unit.	thơ kể chuyện	The narrative-poem follows a messenger across a frozen mountain.
158	dramatic-monologue	noun Study Field: Grade 8 language and literature word Word study: Term structure: dramatic + monologue. Study the complete expression as one field-specific unit.	độc thoại kịch tính	The dramatic-monologue exposes the mayor's pride through his own words.
159	persona	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: persona is the dictionary headword; compare its inflected or derived forms in context.	Người	The poet creates a curious child's persona to describe the museum.
160	enjambment	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	1. Câu thơ 2. vắt dòng	The poet uses enjambment to pull the reader quickly into the next line.
161	caesura	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: caesura is the dictionary headword; compare its inflected or derived forms in context.	1. ngắt 2. giọng	A dash creates a caesura that interrupts the speaker's confident rhythm.
162	scansion	noun Study Field: Grade 8 language and literature word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	1. Sự 2. đọc 3. thử	Through scansion, the students identified the line's repeating beat.
163	iamb	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: iamb is the dictionary headword; compare its inflected or derived forms in context.	1. Nhịp 2. thơ 3. iambơ	The word awake can illustrate an iamb.
164	trochee	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: trochee is the dictionary headword; compare its inflected or derived forms in context.	1. Thơ 2. corê	The word garden can illustrate a trochee.
165	anapest	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: anapest is the dictionary headword; compare its inflected or derived forms in context.	như) anapaest	The phrase in the dark can form an anapest when read with the final word stressed.
166	dactyl	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: dactyl is the dictionary headword; compare its inflected or derived forms in context.	Đactin (thể thơ gồm một âm tiết dài và âm tiết ngắn	The word merrily begins with the pattern of a dactyl.
167	pentameter	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: pentameter is the dictionary headword; compare its inflected or derived forms in context.	1. Thơ 2. năm 3. âm tiết	Many of the play's speeches are written in iambic pentameter.
168	rhyme-scheme	noun Study Field: Grade 8 language and literature word Word study: Term structure: rhyme + scheme. Study the complete expression as one field-specific unit.	sơ đồ vần điệu	The stanza's rhyme-scheme is ABAB.
169	cacophony	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: cacophony is the dictionary headword; compare its inflected or derived forms in context.	1. Tiếng 2. lộn xộn 3. chối tai	Clashing consonants create a cacophony during the battle scene.
170	euphony	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: euphony is the dictionary headword; compare its inflected or derived forms in context.	1. Tiếng 2. êm tai	Long vowels and gentle consonants give the lullaby its euphony.
171	plotline	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: plotline is the dictionary headword; compare its inflected or derived forms in context.	cốt truyện	The missing map begins the adventure plotline.
172	internal-conflict	noun Study Field: Grade 8 language and literature word Word study: Term structure: internal + conflict. Study the complete expression as one field-specific unit.	xung đột nội bộ	Her internal-conflict grows as she must choose between loyalty and honesty.
173	external-conflict	noun Study Field: Grade 8 language and literature word Word study: Term structure: external + conflict. Study the complete expression as one field-specific unit.	xung đột bên ngoài	The climber's external-conflict is the approaching blizzard.
174	rising-action	noun Study Field: Grade 8 language and literature word Word study: Term structure: rising + action. Study the complete expression as one field-specific unit.	hành động tăng cao	During the rising-action, each clue brings the detective closer to danger.
175	falling-action	noun Study Field: Grade 8 language and literature word Word study: Term structure: falling + action. Study the complete expression as one field-specific unit.	hành động rơi	The falling-action explains how the village rebuilds after the flood.

Rhythm in a Ballad

Reading practice for pages 7–9. Five relevant words are highlighted.

English reading

The poetry club compares a narrative ballad with a brief haiku and a mournful elegy. Students clap an anapest, which rises toward its stressed syllable, then a dactyl, which begins with one. Hearing both patterns clarifies how meter shapes mood.

Vietnamese translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. Which poem tells a narrative?

The ballad tells a narrative.

2. Which poem is mournful?

The elegy is mournful.

3. Why do students clap the meters?

Clapping helps them hear the rhythmic patterns.

Cloze vocabulary quiz

1. The ___ remembers the fisher and the coast he loved.

Answer: elegy

2. The phrase in the dark can form an ___ when read with the final word stressed.

Answer: anapest

3. The traditional ___ recounts a sailor's dangerous voyage.

Answer: ballad

4. The word merrily begins with the pattern of a ___.

Answer: dactyl

5. Her ___ describes one raindrop trembling on a leaf.

Answer: haiku

Page 8: words 176–200

Vocabulary page 8
#	Word	Details	Meaning	Sample sentence
176	inciting-incident	noun Study Field: Grade 8 language and literature word Word study: Term structure: inciting + incident. Study the complete expression as one field-specific unit.	sự việc xúi giục	The theft of the compass is the inciting-incident that starts the search.
177	antihero	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: antihero is the dictionary headword; compare its inflected or derived forms in context.	1. phản anh hùng 2. 反英雄	The reluctant smuggler is an antihero who sometimes acts selfishly.
178	round-character	noun Study Field: Grade 8 language and literature word Word study: Term structure: round + character. Study the complete expression as one field-specific unit.	ký tự tròn	The captain is a round-character whose courage exists beside pride and fear.
179	flat-character	noun Study Field: Grade 8 language and literature word Word study: Term structure: flat + character. Study the complete expression as one field-specific unit.	ký tự phẳng	The boastful guard remains a flat-character with little inner development.
180	dynamic-character	noun Study Field: Grade 8 language and literature word Word study: Term structure: dynamic + character. Study the complete expression as one field-specific unit.	nhân vật động	The selfish prince becomes a dynamic-character when he learns to serve others.
181	static-character	noun Study Field: Grade 8 language and literature word Word study: Term structure: static + character. Study the complete expression as one field-specific unit.	ký tự tĩnh	The loyal gardener is a static-character whose values stay steady.
182	tragic-hero	noun Study Field: Grade 8 language and literature word Word study: Term structure: tragic + hero. Study the complete expression as one field-specific unit.	anh hùng bi kịch	The general becomes a tragic-hero when ambition destroys his judgment.
183	comic-relief	noun Study Field: Grade 8 language and literature word Word study: Term structure: comic + relief. Study the complete expression as one field-specific unit.	truyện tranh nhẹ nhõm	The nervous cook provides comic-relief before the final battle.
184	allegorical	adjective Study Field: Grade 8 language and literature word Word study: Base-form focus: allegorical is the dictionary headword; compare its inflected or derived forms in context.	ngụ ngôn	The allegorical journey represents a society's struggle for justice.
185	narrative-arc	noun Study Field: Grade 8 language and literature word Word study: Term structure: narrative + arc. Study the complete expression as one field-specific unit.	arc kể chuyện	The narrative-arc moves from isolation to friendship.
186	frame-story	noun Study Field: Grade 8 language and literature word Word study: Term structure: frame + story. Study the complete expression as one field-specific unit.	câu chuyện khung	In the frame-story, travelers exchange tales during a storm.
187	unreliable-narrator	noun Study Field: Grade 8 language and literature word Word study: Term structure: unreliable + narrator. Study the complete expression as one field-specific unit.	người kể chuyện không đáng tin cậy	Contradictory details reveal that the speaker is an unreliable-narrator.
188	dramatic-irony	noun Study Field: Grade 8 language and literature word Word study: Term structure: dramatic + irony. Study the complete expression as one field-specific unit.	kịch tính-trớ trêu	Dramatic-irony builds tension because viewers see the hidden key before the hero does.
189	situational-irony	noun Study Field: Grade 8 language and literature word Word study: Term structure: situational + irony. Study the complete expression as one field-specific unit.	tình huống trớ trêu	The fire station flooding during a drought creates situational-irony.
190	verbal-irony	noun Study Field: Grade 8 language and literature word Word study: Term structure: verbal + irony. Study the complete expression as one field-specific unit.	lời nói mỉa mai	Saying “perfect timing” after missing the bus is verbal-irony.
191	stock-character	noun Study Field: Grade 8 language and literature word Word study: Term structure: stock + character. Study the complete expression as one field-specific unit.	ký tự chứng khoán	The boastful rival begins as a stock-character but later gains complexity.
192	quest-narrative	noun Study Field: Grade 8 language and literature word Word study: Term structure: quest + narrative. Study the complete expression as one field-specific unit.	câu chuyện nhiệm vụ	The quest-narrative sends three friends in search of a healing spring.
193	coming-of-age	adjective Study Field: Grade 8 language and literature word Word study: Term structure: coming + of + age. Study the complete expression as one field-specific unit.	sắp đến tuổi	The coming-of-age novel follows a teenager learning to accept responsibility.
194	epigraph	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: epigraph is the dictionary headword; compare its inflected or derived forms in context.	1. Chữ 2. khắc	The chapter's epigraph hints that freedom will be its central concern.
195	epilogue	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: epilogue is the dictionary headword; compare its inflected or derived forms in context.	1. Phần 2. kết 3. lời bạt	The epilogue shows the characters ten years after the voyage.
196	prologue	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: prologue is the dictionary headword; compare its inflected or derived forms in context.	mở	The prologue recounts the legend that motivates the hero.
197	stage-direction	noun Study Field: Grade 8 language and literature word Word study: Term structure: stage + direction. Study the complete expression as one field-specific unit.	hướng sân khấu	The stage-direction tells the actor to whisper from behind the door.
198	screenplay	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: screenplay is the dictionary headword; compare its inflected or derived forms in context.	kịch bản	The screenplay indicates each scene's setting and camera-visible action.
199	tableau	noun Study Field: Grade 8 language and literature word Word study: Base-form focus: tableau is the dictionary headword; compare its inflected or derived forms in context.	Hoạt cảnh	The actors formed a tableau of the signing ceremony.
200	archetypal	adjective Study Field: Grade 8 language and literature word Word study: Base-form focus: archetypal is the dictionary headword; compare its inflected or derived forms in context.	nguyên mẫu	The mentor's guidance is an archetypal feature of many hero stories.

Page 8 vocabulary review

Review five selected words from page 8.

Cloze vocabulary quiz

1. The reluctant smuggler is an ___ who sometimes acts selfishly.

Answer: antihero

2. Saying “perfect timing” after missing the bus is ___.

Answer: verbal-irony

3. The captain is a ___ whose courage exists beside pride and fear.

Answer: round-character

4. The boastful rival begins as a ___ but later gains complexity.

Answer: stock-character

5. The boastful guard remains a ___ with little inner development.

Answer: flat-character

Page 9: words 201–225

Vocabulary page 9
#	Word	Details	Meaning	Sample sentence
201	kinetic-energy	noun Study Field: Grade 8 science and technology word Word study: Term structure: kinetic + energy. Study the complete expression as one field-specific unit.	động năng	The rolling ball gains kinetic-energy as it speeds down the ramp.
202	protein-synthesis	noun Study Field: Grade 8 science and technology word Word study: Term structure: protein + synthesis. Study the complete expression as one field-specific unit.	tổng hợp protein	During protein-synthesis, ribosomes join amino acids in a specified order.
203	thermal-energy	noun Study Field: Grade 8 science and technology word Word study: Term structure: thermal + energy. Study the complete expression as one field-specific unit.	năng lượng nhiệt	Heating the water increases its thermal-energy.
204	mechanical-energy	noun Study Field: Grade 8 science and technology word Word study: Term structure: mechanical + energy. Study the complete expression as one field-specific unit.	năng lượng cơ học	At the top of its swing, the pendulum's mechanical-energy is mostly stored.
205	chemical-energy	noun Study Field: Grade 8 science and technology word Word study: Term structure: chemical + energy. Study the complete expression as one field-specific unit.	năng lượng hóa học	A battery converts chemical-energy into electrical energy.
206	electrical-energy	noun Study Field: Grade 8 science and technology word Word study: Term structure: electrical + energy. Study the complete expression as one field-specific unit.	năng lượng điện	The solar panels supply electrical-energy to the building.
207	electromagnetic	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: electromagnetic is the dictionary headword; compare its inflected or derived forms in context.	điện từ	Visible light is one type of electromagnetic radiation.
208	diffraction	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. nhiễu xạ 2. Sự	Diffraction causes water waves to fan out after passing through a narrow gap.
209	interference	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.	1. gây 2. trở ngại 3. quấy rầy	Interference creates alternating bright and dark bands on the screen.
210	resonance	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	1. Tiếng 2. dội	Resonance made the tuning fork vibrate more intensely.
211	photon	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: photon is the dictionary headword; compare its inflected or derived forms in context.	1. quang tử 2. 光子	A photon of visible light can be absorbed by a plant pigment.
212	centripetal	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: centripetal is the dictionary headword; compare its inflected or derived forms in context.	hướng tâm	Centripetal force keeps the ball moving in a circle on its string.
213	centrifugal	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: centrifugal is the dictionary headword; compare its inflected or derived forms in context.	ly tâm	Passengers sense a centrifugal effect when a car turns sharply.
214	torque	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: torque is the dictionary headword; compare its inflected or derived forms in context.	Vòng cổ	A longer wrench can produce more torque on a tight bolt.
215	conductivity	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	1. Tính 2. dẫn	Copper's high conductivity makes it useful in electrical wiring.
216	series-circuit	noun Study Field: Grade 8 science and technology word Word study: Term structure: series + circuit. Study the complete expression as one field-specific unit.	mạch nối tiếp	One broken bulb can interrupt an entire series-circuit.
217	parallel-circuit	noun Study Field: Grade 8 science and technology word Word study: Term structure: parallel + circuit. Study the complete expression as one field-specific unit.	mạch song song	In a parallel-circuit, one lamp can stay lit when another fails.
218	ion	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: ion is the dictionary headword; compare its inflected or derived forms in context.	1. ion 2. ly tử	A sodium atom becomes a positive ion after losing an electron.
219	proton	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: proton is the dictionary headword; compare its inflected or derived forms in context.	1. proton 2. hạt tổ hợp 3. hạt nhân	The proton count determines which element an atom is.
220	neutron	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: neutron is the dictionary headword; compare its inflected or derived forms in context.	nơtron	A neutron adds mass to an atom without adding electric charge.
221	electron	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: electron is the dictionary headword; compare its inflected or derived forms in context.	1. ê-léc-trông 2. điện tử 3. nguyên tử	An electron may move to a higher energy level after absorbing energy.
222	valence	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: valence is the dictionary headword; compare its inflected or derived forms in context.	1. hóa trị 2. Hoá trị	Carbon's valence allows it to form four covalent bonds.
223	covalent	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: covalent is the dictionary headword; compare its inflected or derived forms in context.	cộng hóa trị	Two hydrogen atoms form a covalent bond by sharing electrons.
224	ionic	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: ionic is the dictionary headword; compare its inflected or derived forms in context.	ion	Table salt is an ionic compound made from sodium and chloride ions.
225	acidity	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	Tính	A pH test can compare the acidity of lemon juice and water.

Page 9 vocabulary review

Review five selected words from page 9.

Cloze vocabulary quiz

1. Copper's high ___ makes it useful in electrical wiring.

Answer: conductivity

2. Heating the water increases its ___.

Answer: thermal-energy

3. One broken bulb can interrupt an entire ___.

Answer: series-circuit

4. At the top of its swing, the pendulum's ___ is mostly stored.

Answer: mechanical-energy

5. In a ___, one lamp can stay lit when another fails.

Answer: parallel-circuit

Page 10: words 226–250

Vocabulary page 10
#	Word	Details	Meaning	Sample sentence
226	alkalinity	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	1. tính 2. kiềm	Limestone can increase a lake's alkalinity.
227	oxidation	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. Sự 2. hoá	Rust forms through oxidation of iron.
228	reduction	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. thu nhỏ 2. giảm bớt	During reduction, copper ions gain electrons and become copper atoms.
229	combustion	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. Sự 2. đốt cháy 3. cháy	Complete combustion of the fuel produces carbon dioxide and water.
230	endothermic	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: endothermic is the dictionary headword; compare its inflected or derived forms in context.	thu nhiệt	The endothermic reaction made the container feel cold.
231	exothermic	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: exothermic is the dictionary headword; compare its inflected or derived forms in context.	toả nhiệt	The exothermic reaction warmed the solution.
232	cell-membrane	noun Study Field: Grade 8 science and technology word Word study: Term structure: cell + membrane. Study the complete expression as one field-specific unit.	màng tế bào	The cell-membrane allows some substances to pass while blocking others.
233	mitochondrion	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: mitochondrion is the dictionary headword; compare its inflected or derived forms in context.	1. ti thể 2. 司體	A muscle cell contains many mitochondria, and each mitochondrion helps supply energy.
234	chloroplast	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: chloroplast is the dictionary headword; compare its inflected or derived forms in context.	1. Lạp 2. lục	Chlorophyll inside each chloroplast absorbs light.
235	ribosome	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: ribosome is the dictionary headword; compare its inflected or derived forms in context.	ribôxôm	A ribosome links amino acids in the order specified by genetic instructions.
236	genotype	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: genotype is the dictionary headword; compare its inflected or derived forms in context.	1. Kiểu 2. di truyền	The plant's genotype includes one allele for tall growth and one for short growth.
237	phenotype	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: phenotype is the dictionary headword; compare its inflected or derived forms in context.	1. kiểu hình 2. 矯形	Sunlight can influence the color phenotype of some plants.
238	meiosis	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: meiosis is the dictionary headword; compare its inflected or derived forms in context.	1. giảm phân 2. Cách 3. nói	Meiosis creates genetic variation in eggs and sperm.
239	mitosis	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: mitosis is the dictionary headword; compare its inflected or derived forms in context.	1. nguyên phân 2. Sự 3. phân bào	Skin cells multiply through mitosis as a cut heals.
240	natural-selection	noun Study Field: Grade 8 science and technology word Word study: Term structure: natural + selection. Study the complete expression as one field-specific unit.	chọn lọc tự nhiên	Natural-selection favored moths whose coloring hid them from predators.
241	speciation	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. hình 2. loài	Long isolation on separate islands can lead to speciation.
242	transcription	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. chép 2. bản sao	During transcription, a cell produces an RNA copy of a gene.
243	succession	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	1. kế tiếp 2. liên tiếp	After the lava cools, ecological succession begins with lichens.
244	hormone	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: hormone is the dictionary headword; compare its inflected or derived forms in context.	nội tiết tố	The hormone insulin helps regulate blood glucose.
245	antibiotic	noun Study Field: Grade 8 science and technology word Word study: Prefix focus: anti- means against or opposed to.	1. kháng sinh 2. trụ sinh	A doctor may prescribe an antibiotic for a confirmed bacterial infection.
246	tectonic-plate	noun Study Field: Grade 8 science and technology word Word study: Term structure: tectonic + plate. Study the complete expression as one field-specific unit.	mảng kiến tạo	The Pacific tectonic-plate meets several other plates along active boundaries.
247	codon	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: codon is the dictionary headword; compare its inflected or derived forms in context.	1. Côđon 2. thể 3. chuông	Each codon in messenger RNA directs one step in protein assembly.
248	subduction	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. Sự 2. giảm 3. rút	Subduction can produce deep ocean trenches and volcanic arcs.
249	convection-current	noun Study Field: Grade 8 science and technology word Word study: Term structure: convection + current. Study the complete expression as one field-specific unit.	dòng đối lưu	A convection-current forms in the heated water.
250	fault-line	noun Study Field: Grade 8 science and technology word Word study: Term structure: fault + line. Study the complete expression as one field-specific unit.	đường đứt gãy	The earthquake began near a mapped fault-line.

Evidence of Change

Reading practice for pages 10–12. Five relevant words are highlighted.

English reading

During transcription, a cell copies genetic information into RNA. Over generations, natural-selection can favor useful variations, and isolated populations may undergo speciation. These biological processes differ from combustion, a chemical reaction involving oxygen, and from a simple reduction in population size.

Vietnamese translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What happens during transcription?

Genetic information is copied into RNA.

2. What may happen to isolated populations?

They may undergo speciation.

3. Is combustion a biological process?

No, combustion is a chemical reaction.

Cloze vocabulary quiz

1. ___ favored moths whose coloring hid them from predators.

Answer: natural-selection

2. During ___, copper ions gain electrons and become copper atoms.

Answer: reduction

3. Long isolation on separate islands can lead to ___.

Answer: speciation

4. Complete ___ of the fuel produces carbon dioxide and water.

Answer: combustion

5. During ___, a cell produces an RNA copy of a gene.

Answer: transcription

Page 11: words 251–275

Vocabulary page 11
#	Word	Details	Meaning	Sample sentence
251	seismic-wave	noun Study Field: Grade 8 science and technology word Word study: Term structure: seismic + wave. Study the complete expression as one field-specific unit.	sóng địa chấn	A seismic-wave reached the distant station several minutes after the quake.
252	rock-cycle	noun Study Field: Grade 8 science and technology word Word study: Term structure: rock + cycle. Study the complete expression as one field-specific unit.	chu kỳ đá	Melting, cooling, erosion, and pressure drive the rock-cycle.
253	greenhouse-effect	noun Study Field: Grade 8 science and technology word Word study: Term structure: greenhouse + effect. Study the complete expression as one field-specific unit.	hiệu ứng nhà kính	Without the natural greenhouse-effect, Earth's average temperature would be much lower.
254	carbon-cycle	noun Study Field: Grade 8 science and technology word Word study: Term structure: carbon + cycle. Study the complete expression as one field-specific unit.	chu trình cacbon	Photosynthesis removes carbon dioxide from the air as part of the carbon-cycle.
255	ocean-current	noun Study Field: Grade 8 science and technology word Word study: Term structure: ocean + current. Study the complete expression as one field-specific unit.	dòng hải lưu	A warm ocean-current can raise winter temperatures along a coast.
256	programming	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: programming is the dictionary headword; compare its inflected or derived forms in context.	lập trình	Programming the robot required a loop that repeated the movement.
257	bandwidth	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: bandwidth is the dictionary headword; compare its inflected or derived forms in context.	1. Dải 2. thông 3. bề rộng	Streaming several videos at once uses considerable bandwidth.
258	binary	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: binary is the dictionary headword; compare its inflected or derived forms in context.	nhị phân	Computers store many kinds of information in binary form using zeros and ones.
259	nanotechnology	noun Study Field: Grade 8 science and technology word Word study: Root and suffix focus: -logy means the study of a subject.	công nghệ nano	Nanotechnology can create coatings that resist water and stains.
260	telemetry	noun Study Field: Grade 8 science and technology word Word study: Root and suffix focus: -metry relates to measuring.	1. viễn trắc 2. Phép đo 3. từ	Satellite telemetry reported the spacecraft's temperature and speed.
261	microprocessor	noun Study Field: Grade 8 science and technology word Word study: Prefix focus: micro- means small.	xử lý	The washing machine's microprocessor controls each cycle.
262	hardware	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: hardware is the dictionary headword; compare its inflected or derived forms in context.	1. cương liệu 2. phần cứng 3. phần máy	The keyboard and monitor are computer hardware.
263	concave	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: concave is the dictionary headword; compare its inflected or derived forms in context.	lõm	A concave mirror can focus parallel light rays.
264	convex	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: convex is the dictionary headword; compare its inflected or derived forms in context.	lồi	A convex lens can bring light rays together.
265	focal-point	noun Study Field: Grade 8 science and technology word Word study: Term structure: focal + point. Study the complete expression as one field-specific unit.	tiêu điểm	The paper began to warm when sunlight converged at the focal-point.
266	lens	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: lens is the dictionary headword; compare its inflected or derived forms in context.	thấu kính	The microscope's objective lens magnifies the specimen.
267	polarization	noun Study Field: Grade 8 science and technology word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	1. Sự 2. phân cực	Polarization helps sunglasses reduce reflected glare.
268	ultraviolet	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: ultraviolet is the dictionary headword; compare its inflected or derived forms in context.	1. cực tím 2. tử ngoại	Ultraviolet radiation can damage unprotected skin.
269	infrared	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: infrared is the dictionary headword; compare its inflected or derived forms in context.	1. hồng ngoại 2. 紅外	A thermal camera detects infrared radiation from warm objects.
270	x-ray	noun Study Field: Grade 8 science and technology word Word study: Term structure: x + ray. Study the complete expression as one field-specific unit.	Rơngen	An x-ray revealed a small fracture in the bone.
271	gamma-ray	noun Study Field: Grade 8 science and technology word Word study: Term structure: gamma + ray. Study the complete expression as one field-specific unit.	tia gamma	A gamma-ray can pass through materials that block visible light.
272	radio-wave	noun Study Field: Grade 8 science and technology word Word study: Term structure: radio + wave. Study the complete expression as one field-specific unit.	sóng vô tuyến	The antenna transmits a radio-wave carrying the audio signal.
273	microwave	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: microwave is the dictionary headword; compare its inflected or derived forms in context.	1. vi ba 2. 微波 3. vi sóng	A microwave in radar can reflect from an approaching storm.
274	visible-light	noun Study Field: Grade 8 science and technology word Word study: Term structure: visible + light. Study the complete expression as one field-specific unit.	ánh sáng nhìn thấy được	A prism separates visible-light into a band of colors.
275	sound-wave	noun Study Field: Grade 8 science and technology word Word study: Term structure: sound + wave. Study the complete expression as one field-specific unit.	Sóng	The sound-wave traveled through air from the speaker to the microphone.

Page 11 vocabulary review

Review five selected words from page 11.

Cloze vocabulary quiz

1. Without the natural ___, Earth's average temperature would be much lower.

Answer: greenhouse-effect

2. The microscope's objective ___ magnifies the specimen.

Answer: lens

3. Photosynthesis removes carbon dioxide from the air as part of the ___.

Answer: carbon-cycle

4. ___ helps sunglasses reduce reflected glare.

Answer: polarization

5. A warm ___ can raise winter temperatures along a coast.

Answer: ocean-current

Page 12: words 276–300

Vocabulary page 12
#	Word	Details	Meaning	Sample sentence
276	pitch	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: pitch is the dictionary headword; compare its inflected or derived forms in context.	Hắc	A faster vibration produces a higher pitch.
277	decibel	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: decibel is the dictionary headword; compare its inflected or derived forms in context.	Đêxiben (dB	A whisper has a much lower decibel level than a siren.
278	echo	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: echo is the dictionary headword; compare its inflected or derived forms in context.	1. tiếng dội 2. tiếng vang	The shout returned as an echo from the canyon wall.
279	gear-ratio	noun Study Field: Grade 8 science and technology word Word study: Term structure: gear + ratio. Study the complete expression as one field-specific unit.	1. Số 2. truyền	Changing the gear-ratio increased the bicycle wheel's turning force.
280	power	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: power is the dictionary headword; compare its inflected or derived forms in context.	1. Khả năng 2. tài năng 3. năng lực	The motor's power tells how quickly it can perform work.
281	horsepower	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: horsepower is the dictionary headword; compare its inflected or derived forms in context.	1. Sức 2. ngựa 3. mã lực	The larger engine produces greater horsepower.
282	periodic-table	noun Study Field: Grade 8 science and technology word Word study: Term structure: periodic + table. Study the complete expression as one field-specific unit.	bảng tuần hoàn	The periodic-table places elements with similar behaviors in the same column.
283	atomic-number	noun Study Field: Grade 8 science and technology word Word study: Term structure: atomic + number. Study the complete expression as one field-specific unit.	số nguyên tử	Oxygen has an atomic-number of eight.
284	atomic-mass	noun Study Field: Grade 8 science and technology word Word study: Term structure: atomic + mass. Study the complete expression as one field-specific unit.	khối lượng nguyên tử	The periodic table lists chlorine's atomic-mass as about 35.45.
285	chemical-symbol	noun Study Field: Grade 8 science and technology word Word study: Term structure: chemical + symbol. Study the complete expression as one field-specific unit.	ký hiệu hóa học	Fe is the chemical-symbol for iron.
286	electron-shell	noun Study Field: Grade 8 science and technology word Word study: Term structure: electron + shell. Study the complete expression as one field-specific unit.	vỏ điện tử	The first electron-shell can hold two electrons.
287	aqueous	adjective Study Field: Grade 8 science and technology word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	nước	The label aq indicates that the substance is in an aqueous solution.
288	colloid	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: colloid is the dictionary headword; compare its inflected or derived forms in context.	Chất keo	Fog is a colloid of liquid droplets dispersed in air.
289	saturated	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: saturated is the dictionary headword; compare its inflected or derived forms in context.	bão hòa	No more sugar dissolved once the solution became saturated.
290	unsaturated	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: unsaturated is the dictionary headword; compare its inflected or derived forms in context.	chưa bão hòa	The unsaturated solution accepted another spoonful of salt.
291	supersaturated	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: supersaturated is the dictionary headword; compare its inflected or derived forms in context.	siêu bão hòa	A seed crystal caused the supersaturated solution to crystallize rapidly.
292	dominant	adjective Study Field: Grade 8 science and technology word Word study: Base-form focus: dominant is the dictionary headword; compare its inflected or derived forms in context.	trội	A dominant allele can mask the effect of a recessive allele.
293	recessive	adjective Study Field: Grade 8 science and technology word Word study: Suffix focus: -ive commonly forms an adjective meaning having a quality or tendency.	lặn	A recessive trait may appear when an organism inherits two recessive alleles.
294	homozygous	adjective Study Field: Grade 8 science and technology word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	đồng hợp tử	A homozygous plant carries two matching alleles for seed color.
295	heterozygous	adjective Study Field: Grade 8 science and technology word Word study: Suffix focus: -ous commonly forms an adjective meaning full of or characterized by.	dị hợp tử	A heterozygous organism can pass either allele to its offspring.
296	sex-linked	adjective Study Field: Grade 8 science and technology word Word study: Term structure: sex + linked. Study the complete expression as one field-specific unit.	liên kết với giới tính	Red-green color blindness is often taught as a sex-linked trait.
297	pedigree	noun Study Field: Grade 8 science and technology word Word study: Base-form focus: pedigree is the dictionary headword; compare its inflected or derived forms in context.	Phả hệ	The pedigree suggests that the trait is recessive.
298	genetic-code	noun Study Field: Grade 8 science and technology word Word study: Term structure: genetic + code. Study the complete expression as one field-specific unit.	mã di truyền	Nearly all organisms use the same basic genetic-code.
299	DNA	noun Study Field: Grade 8 science and technology word Word study: Capitalization focus: DNA is an abbreviation or initialism; preserve its capital letters.	1. Phân tử 2. thông tin 3. di truyền	A DNA sequence contains information that cells can copy.
300	RNA	noun Study Field: Grade 8 science and technology word Word study: Capitalization focus: RNA is an abbreviation or initialism; preserve its capital letters.	ARN	Messenger RNA carries a gene's instructions to a ribosome.

Page 12 vocabulary review

Review five selected words from page 12.

Cloze vocabulary quiz

1. The shout returned as an ___ from the canyon wall.

Answer: echo

2. A seed crystal caused the ___ solution to crystallize rapidly.

Answer: supersaturated

3. Changing the ___ increased the bicycle wheel's turning force.

Answer: gear-ratio

4. A ___ allele can mask the effect of a recessive allele.

Answer: dominant

5. The motor's ___ tells how quickly it can perform work.

Answer: power

Page 13: words 301–325

Vocabulary page 13
#	Word	Details	Meaning	Sample sentence
301	linear-equation	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: linear + equation. Study the complete expression as one field-specific unit.	phương trình tuyến tính	The linear-equation y = 3x + 2 has a slope of three.
302	y-intercept	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: y + intercept. Study the complete expression as one field-specific unit.	chặn y	The line's y-intercept is (0, 4).
303	x-intercept	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: x + intercept. Study the complete expression as one field-specific unit.	chặn x	The graph has an x-intercept at (-2, 0).
304	fixed-cost	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: fixed + cost. Study the complete expression as one field-specific unit.	chi phí cố định	Monthly rent remains a fixed-cost whether the bakery sells ten loaves or a thousand.
305	variable-cost	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: variable + cost. Study the complete expression as one field-specific unit.	chi phí biến đổi	Flour is a variable-cost because the bakery buys more when it makes more bread.
306	line-of-best-fit	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: line + of + best + fit. Study the complete expression as one field-specific unit.	dòng phù hợp nhất	The line-of-best-fit shows that study time and test scores generally rise together.
307	association	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. kết hợp 2. liên hợp 3. liên kết	The scatter plot suggests a positive association between temperature and ice-cream sales.
308	sales-tax	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: sales + tax. Study the complete expression as one field-specific unit.	thuế bán hàng	The receipt lists sales-tax separately from the item's price.
309	direct-variation	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: direct + variation. Study the complete expression as one field-specific unit.	biến thiên trực tiếp	The distance traveled shows direct-variation with time when speed remains constant.
310	inverse-variation	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: inverse + variation. Study the complete expression as one field-specific unit.	biến thiên nghịch đảo	For a fixed distance, travel time shows inverse-variation with speed.
311	rate-of-change	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: rate + of + change. Study the complete expression as one field-specific unit.	tỷ lệ thay đổi	The graph's rate-of-change is five kilometers per hour.
312	property-tax	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: property + tax. Study the complete expression as one field-specific unit.	1. Thuế 2. tài sản 3. hiện	The town uses property-tax revenue to support schools and fire services.
313	scientific-notation	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: scientific + notation. Study the complete expression as one field-specific unit.	ký hiệu khoa học	The distance 150,000,000 kilometers is 1.5 × 10⁸ in scientific-notation.
314	square-root	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: square + root. Study the complete expression as one field-specific unit.	1. Căn 2. bậc	The principal square-root of 81 is 9.
315	cube-root	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: cube + root. Study the complete expression as one field-specific unit.	căn bậc ba	The cube-root of 125 is 5.
316	irrational-number	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: irrational + number. Study the complete expression as one field-specific unit.	số vô tỷ	The number π is an irrational-number with a nonrepeating decimal.
317	rational-number	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: rational + number. Study the complete expression as one field-specific unit.	số hữu tỉ	The decimal 0.75 is a rational-number because it equals 3/4.
318	payroll-tax	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: payroll + tax. Study the complete expression as one field-specific unit.	thuế tiền lương	The pay stub shows the payroll-tax withheld from the worker's earnings.
319	pythagorean-theorem	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: pythagorean + theorem. Study the complete expression as one field-specific unit.	định lý pythagore	The pythagorean-theorem confirms that a triangle with sides 3, 4, and 5 is right.
320	hypotenuse	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: hypotenuse is the dictionary headword; compare its inflected or derived forms in context.	cạnh huyền	The hypotenuse is the longest side of a right triangle.
321	congruence	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ence commonly forms a noun naming an action, quality, or state.	1. thích hợp 2. phù hợp	A sequence of rigid motions can demonstrate the triangles' congruence.
322	transformation	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. thay đổi 2. sự biến	A rotation is a transformation that turns a figure around a fixed point.
323	alternate-interior-angles	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: alternate + interior + angles. Study the complete expression as one field-specific unit.	góc-nội thất thay thế	When parallel lines are cut by a transversal, alternate-interior-angles are congruent.
324	corresponding-angles	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: corresponding + angles. Study the complete expression as one field-specific unit.	góc tương ứng	Equal corresponding-angles indicate that the two lines are parallel.
325	vertical-angles	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: vertical + angles. Study the complete expression as one field-specific unit.	góc đứng	Vertical-angles always have equal measures.

The Theater's Costs

Reading practice for pages 13–15. Five relevant words are highlighted.

English reading

A theater models ticket sales with a linear-equation. Its fixed-cost includes the stage rental, while each printed program adds a variable-cost. On the graph, the y-intercept represents the starting expense, and the x-intercept shows when revenue finally balances cost.

Vietnamese translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What is one fixed cost?

The stage rental is a fixed cost.

2. What adds a variable cost?

Each printed program adds a variable cost.

3. What does the x-intercept show?

It shows when revenue balances cost.

Page 14: words 326–350

Vocabulary page 14
#	Word	Details	Meaning	Sample sentence
326	frequency-table	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: frequency + table. Study the complete expression as one field-specific unit.	bảng tần số	The frequency-table shows that blue was selected eight times.
327	box-plot	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: box + plot. Study the complete expression as one field-specific unit.	hộp âm mưu	The box-plot makes the two classes' medians easy to compare.
328	interquartile-range	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: interquartile + range. Study the complete expression as one field-specific unit.	phạm vi liên vùng	The interquartile-range measures the spread of the middle half of the data.
329	sample-space	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: sample + space. Study the complete expression as one field-specific unit.	không gian mẫu	A coin toss has the sample-space {heads, tails}.
330	independent-event	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: independent + event. Study the complete expression as one field-specific unit.	sự kiện độc lập	Rolling a die is an independent-event from flipping a coin.
331	dependent-event	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: dependent + event. Study the complete expression as one field-specific unit.	sự kiện phụ thuộc	Drawing a second card without replacement is a dependent-event.
332	compound-event	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: compound + event. Study the complete expression as one field-specific unit.	sự kiện ghép	Rolling an even number and then a six is a compound-event.
333	random-sample	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: random + sample. Study the complete expression as one field-specific unit.	mẫu ngẫu nhiên	The researcher used a random-sample to reduce selection bias.
334	biased-sample	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: biased + sample. Study the complete expression as one field-specific unit.	mẫu thiên vị	Surveying only basketball players creates a biased-sample of student sports preferences.
335	opportunity-cost	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: opportunity + cost. Study the complete expression as one field-specific unit.	chi phí cơ hội	The opportunity-cost of attending the concert is the shift Maya cannot work.
336	price	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: price is the dictionary headword; compare its inflected or derived forms in context.	1. giá 2. giá cả 3. trả	A shortage of oranges caused the price of juice to rise.
337	services	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: services is the dictionary headword; compare its inflected or derived forms in context.	1. Các 2. dịch vụ	Haircuts and legal advice are services.
338	productivity	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ity commonly forms a noun naming a quality, state, or condition.	1. Sức 2. sản xuất 3. năng suất	New equipment increased the factory's productivity without extending work hours.
339	monopoly	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: monopoly is the dictionary headword; compare its inflected or derived forms in context.	1. Độc quyền 2. vật 3. độc chiếm	Regulators investigated whether the merger would create a monopoly.
340	gross-domestic-product	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: gross + domestic + product. Study the complete expression as one field-specific unit.	tổng sản phẩm quốc nội	Economists use gross-domestic-product to estimate the size of a national economy.
341	quota	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: quota is the dictionary headword; compare its inflected or derived forms in context.	Phần	The fishing quota protects the population from excessive harvesting.
342	exchange-rate	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: exchange + rate. Study the complete expression as one field-specific unit.	tỷ giá hối đoái	A changing exchange-rate altered the cost of imported bicycles.
343	loss	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: loss is the dictionary headword; compare its inflected or derived forms in context.	mất	The shop reported a loss after repairs cost more than monthly sales.
344	subsidy	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: subsidy is the dictionary headword; compare its inflected or derived forms in context.	1. trợ cấp 2. Tiền 3. cấp	A transit subsidy reduced fares for low-income riders.
345	banking	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: banking is the dictionary headword; compare its inflected or derived forms in context.	1. Công việc 2. ngân hàng	Online banking allows customers to transfer funds without visiting a branch.
346	stock	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: stock is the dictionary headword; compare its inflected or derived forms in context.	1. cổ phiếu 2. dữ 3. trữ	Buying one stock gives an investor a small ownership stake in the company.
347	bond	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: bond is the dictionary headword; compare its inflected or derived forms in context.	1. Dây 2. đai 3. buộc	The city issued a bond to finance a new water system.
348	salary	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: salary is the dictionary headword; compare its inflected or derived forms in context.	1. lương 2. Tiền lương	The job offer includes an annual salary and health benefits.
349	insurance	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ance commonly forms a noun naming an action, quality, or state.	bảo hiểm	Home insurance helped pay for repairs after the storm.
350	mortgage	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: mortgage is the dictionary headword; compare its inflected or derived forms in context.	1. quyền cầm cố 2. Văn tự 3. thế chấp	The family compared interest rates before choosing a mortgage.

Page 15: words 351–375

Vocabulary page 15
#	Word	Details	Meaning	Sample sentence
351	lease	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: lease is the dictionary headword; compare its inflected or derived forms in context.	1. Hợp 2. cho thuê	The apartment lease lasts twelve months.
352	collateral	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: collateral is the dictionary headword; compare its inflected or derived forms in context.	tài sản thế chấp	The farmer used equipment as collateral for the business loan.
353	bankruptcy	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: bankruptcy is the dictionary headword; compare its inflected or derived forms in context.	1. Sự 2. vỡ nợ 3. phá sản	Bankruptcy allowed the company to reorganize what it owed.
354	system-of-equations	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: system + of + equations. Study the complete expression as one field-specific unit.	hệ phương trình	The system-of-equations intersects at the point that satisfies both equations.
355	elimination	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. loại 2. loại trừ	Using elimination, Rae added the equations to remove y.
356	substitution	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. Sự thế 2. thay thế	Through substitution, we replaced y with 2x + 1.
357	solution-set	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: solution + set. Study the complete expression as one field-specific unit.	bộ giải pháp	The inequality x > 4 has a solution-set containing every number greater than four.
358	linear-model	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: linear + model. Study the complete expression as one field-specific unit.	mô hình tuyến tính	The scientist used a linear-model to estimate future water use.
359	polynomial	noun Study Field: Grade 8 mathematics and economics word Word study: Prefix focus: poly- means many.	đa thức	The expression 3x² – 2x + 7 is a polynomial.
360	monomial	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: monomial is the dictionary headword; compare its inflected or derived forms in context.	đơn thức	The expression 6x³ is a monomial.
361	binomial	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: binomial is the dictionary headword; compare its inflected or derived forms in context.	Nhị thức	The expression x + 5 is a binomial.
362	trinomial	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: trinomial is the dictionary headword; compare its inflected or derived forms in context.	tam thức	The expression x² + 4x + 4 is a trinomial.
363	degree	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: degree is the dictionary headword; compare its inflected or derived forms in context.	1. bậc 2. Mức độ 3. trình độ	The polynomial 2x⁴ – x has degree four.
364	like-terms	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: like + terms. Study the complete expression as one field-specific unit.	điều khoản tương tự	The like-terms 3x and 8x combine to make 11x.
365	business-cycle	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: business + cycle. Study the complete expression as one field-specific unit.	chu kỳ kinh doanh	Employment often rises during the expansion phase of a business-cycle.
366	commutative-property	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: commutative + property. Study the complete expression as one field-specific unit.	tính chất giao hoán	The commutative-property shows that 7 + 2 equals 2 + 7.
367	associative-property	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: associative + property. Study the complete expression as one field-specific unit.	tài sản kết hợp	The associative-property allows (2 × 3) × 5 to be regrouped as 2 × (3 × 5).
368	zero-product-property	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: zero + product + property. Study the complete expression as one field-specific unit.	tài sản không có sản phẩm	The zero-product-property solves (x – 2)(x + 4) = 0.
369	angle-bisector	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: angle + bisector. Study the complete expression as one field-specific unit.	phân giác của góc	The angle-bisector divides the 60-degree angle into two 30-degree angles.
370	perpendicular-bisector	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: perpendicular + bisector. Study the complete expression as one field-specific unit.	đường phân giác vuông góc	Every point on the perpendicular-bisector is equally distant from the segment's endpoints.
371	midpoint	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: midpoint is the dictionary headword; compare its inflected or derived forms in context.	Trung điểm	The midpoint of the segment from (0, 0) to (6, 4) is (3, 2).
372	distance-formula	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: distance + formula. Study the complete expression as one field-specific unit.	công thức khoảng cách	The distance-formula is based on the Pythagorean theorem.
373	pythagorean-triple	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: pythagorean + triple. Study the complete expression as one field-specific unit.	pythagore-bộ ba	The numbers 5, 12, and 13 form a pythagorean-triple.
374	scale-factor	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: scale + factor. Study the complete expression as one field-specific unit.	hệ số quy mô	A scale-factor of two doubles every side length.
375	rigid-motion	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: rigid + motion. Study the complete expression as one field-specific unit.	chuyển động cứng nhắc	A reflection is a rigid-motion because the image remains congruent to the original.

Page 16: words 376–400

Vocabulary page 16
#	Word	Details	Meaning	Sample sentence
376	preimage	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: preimage is the dictionary headword; compare its inflected or derived forms in context.	hình ảnh trước	Triangle ABC is the preimage of the translated triangle A′B′C′.
377	orientation	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	hướng	A reflection reverses a polygon's orientation.
378	two-way-table	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: two + way + table. Study the complete expression as one field-specific unit.	bàn hai chiều	The two-way-table compares transportation choice with grade level.
379	relative-frequency	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: relative + frequency. Study the complete expression as one field-specific unit.	tần số tương đối	Dividing each count by the total gives its relative-frequency.
380	bivariate-data	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: bivariate + data. Study the complete expression as one field-specific unit.	dữ liệu hai biến	The bivariate-data record each student's height and arm span.
381	univariate-data	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: univariate + data. Study the complete expression as one field-specific unit.	dữ liệu đơn biến	The list of daily temperatures is univariate-data.
382	cluster	noun Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: cluster is the dictionary headword; compare its inflected or derived forms in context.	1. Đám 2. bó 3. cụm	A cluster near the upper right appears in the scatter plot.
383	skewed	adjective Study Field: Grade 8 mathematics and economics word Word study: Base-form focus: skewed is the dictionary headword; compare its inflected or derived forms in context.	lệch	Household-income data are often skewed toward higher values.
384	variability	noun Study Field: Grade 8 mathematics and economics word Word study: Suffix focus: -ability forms a noun for the capacity to have a quality or perform an action.	1. Tính 2. thay đổi 3. biến	A larger spread in scores indicates greater variability.
385	standard-deviation	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: standard + deviation. Study the complete expression as one field-specific unit.	độ lệch chuẩn	The consistent measurements have a small standard-deviation.
386	sampling-error	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: sampling + error. Study the complete expression as one field-specific unit.	lỗi lấy mẫu	A larger random sample can reduce sampling-error.
387	margin-of-error	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: margin + of + error. Study the complete expression as one field-specific unit.	biên độ lỗi	The poll reports a margin-of-error of three percentage points.
388	economic-system	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: economic + system. Study the complete expression as one field-specific unit.	hệ thống kinh tế	An economic-system determines who makes major production decisions.
389	command-economy	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: command + economy. Study the complete expression as one field-specific unit.	nền kinh tế chỉ huy	In a command-economy, the government sets many output targets.
390	mixed-economy	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: mixed + economy. Study the complete expression as one field-specific unit.	nền kinh tế hỗn hợp	A mixed-economy allows private firms while regulating public utilities.
391	market-economy	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: market + economy. Study the complete expression as one field-specific unit.	kinh tế thị trường	Competition influences what companies produce in a market-economy.
392	traditional-economy	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: traditional + economy. Study the complete expression as one field-specific unit.	kinh tế truyền thống	Fishing methods may pass through generations in a traditional-economy.
393	fiscal-policy	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: fiscal + policy. Study the complete expression as one field-specific unit.	chính sách tài chính	The legislature changed fiscal-policy by increasing infrastructure spending.
394	monetary-policy	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: monetary + policy. Study the complete expression as one field-specific unit.	chính sách tiền tệ	The central bank tightened monetary-policy to slow inflation.
395	central-bank	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: central + bank. Study the complete expression as one field-specific unit.	ngân hàng trung ương	The central-bank raised its benchmark interest rate.
396	commercial-bank	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: commercial + bank. Study the complete expression as one field-specific unit.	ngân hàng thương mại	The commercial-bank approved a loan for the bakery.
397	interest-rate	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: interest + rate. Study the complete expression as one field-specific unit.	lãi suất	A lower interest-rate reduces the monthly cost of a loan.
398	compound-interest	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: compound + interest. Study the complete expression as one field-specific unit.	lãi kép	Compound-interest causes long-term savings to grow more quickly.
399	simple-interest	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: simple + interest. Study the complete expression as one field-specific unit.	lãi suất đơn giản	The loan uses simple-interest based on its starting principal.
400	net-worth	noun Study Field: Grade 8 mathematics and economics word Word study: Term structure: net + worth. Study the complete expression as one field-specific unit.	giá trị ròng	Subtracting liabilities from assets gives net-worth.

Turning a Figure

Reading practice for pages 16–18. Five relevant words are highlighted.

English reading

In geometry, Elena rotates a preimage and checks the new figure’s orientation. Later, she studies bivariate-data about study time and quiz scores. A two-way-table organizes the categories, while relative-frequency helps her compare groups of different sizes.

Vietnamese translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What does Elena rotate?

Elena rotates a preimage.

2. What data does she study?

She studies study time and quiz scores.

3. Why does she use relative frequency?

It helps compare groups of different sizes.

Page 17: words 401–425

Vocabulary page 17
#	Word	Details	Meaning	Sample sentence
401	mercantilism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. chủ nghĩa trọng thương 2. Tính 3. hám	European mercantilism encouraged colonies to supply raw materials to the ruling country.
402	triangular-trade	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: triangular + trade. Study the complete expression as one field-specific unit.	buôn bán tam giác	The triangular-trade carried manufactured goods, enslaved people, and colonial products along different routes.
403	transatlantic	adjective Study Field: Grade 8 history, civics, and social science word Word study: Prefix focus: trans- means across, through, or beyond.	xuyên Đại Tây Dương	The transatlantic voyage took several weeks under sail.
404	declaration	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. tuyên bố 2. lời	The delegates issued a declaration explaining their decision to seek independence.
405	federalism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. Chế độ 2. liên bang	Under federalism, national and state governments exercise different powers.
406	separation-of-powers	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: separation + of + powers. Study the complete expression as one field-specific unit.	sự phân chia quyền lực	Separation-of-powers prevents one branch from performing every government function.
407	checks-and-balances	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: checks + and + balances. Study the complete expression as one field-specific unit.	kiểm tra và cân bằng	A presidential veto is part of the checks-and-balances system.
408	ratification	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. thông qua 2. phê chuẩn	The treaty required ratification by the legislature.
409	tyranny	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: tyranny is the dictionary headword; compare its inflected or derived forms in context.	1. sự bạo ngược 2. sự chuyên chế 3. chế độ chuyên chế	The pamphlet warned that unchecked authority could become tyranny.
410	judicial-review	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: judicial + review. Study the complete expression as one field-specific unit.	xét xử tư pháp	Through judicial-review, a court may invalidate an unconstitutional law.
411	due-process	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: due + process. Study the complete expression as one field-specific unit.	đúng thủ tục	Due-process requires notice and a meaningful opportunity to be heard.
412	equal-protection	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: equal + protection. Study the complete expression as one field-specific unit.	bảo vệ bình đẳng	The plaintiffs argued that the policy violated equal-protection.
413	civil-liberty	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: civil + liberty. Study the complete expression as one field-specific unit.	tự do dân sự	Freedom of speech is a civil-liberty.
414	civil-right	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: civil + right. Study the complete expression as one field-specific unit.	quyền công dân	The right to vote without racial discrimination is a civil-right.
415	abolitionism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. Chủ nghĩa 2. bãi 3. nô	Abolitionism grew through speeches, newspapers, petitions, and resistance.
416	Manifest Destiny	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Manifest + Destiny. Study the complete expression as one field-specific unit.	Định mệnh rõ ràng	Supporters used Manifest Destiny to defend westward territorial expansion.
417	westward-expansion	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: westward + expansion. Study the complete expression as one field-specific unit.	mở rộng về phía tây	Westward-expansion displaced many Indigenous communities.
418	annexation	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	phụ	The annexation of the region intensified a national dispute.
419	homestead	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: homestead is the dictionary headword; compare its inflected or derived forms in context.	1. Nhà cửa 2. vườn tược	The family built a cabin on its prairie homestead.
420	reservation	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. Sự 2. hạn chế 3. điều kiện	Federal policy forced many Native communities onto a reservation.
421	removal	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: removal is the dictionary headword; compare its inflected or derived forms in context.	1. Việc 2. dời 3. di chuyển	The removal of Indigenous nations caused widespread suffering and death.
422	secession	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -sion commonly forms a noun naming an action, process, or result.	khỏi	The state's secession deepened the constitutional crisis.
423	union	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: union is the dictionary headword; compare its inflected or derived forms in context.	1. liên minh 2. 聯盟 3. liên bang	Leaders debated how to preserve the union.
424	confederacy	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: confederacy is the dictionary headword; compare its inflected or derived forms in context.	Liên minh	The southern confederacy formed after several states seceded.
425	colonialism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. chủ nghĩa thực dân 2. 主義殖民 3. Chủ nghĩa	Colonialism redirected local resources toward the ruling empire.

Page 18: words 426–450

Vocabulary page 18
#	Word	Details	Meaning	Sample sentence
426	militarism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. Chủ nghĩa 2. quân phiệt	European militarism increased tension before the war.
427	role	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: role is the dictionary headword; compare its inflected or derived forms in context.	vai trò	A person's social role can change between home, school, and work.
428	socialization	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ization forms a noun for a process of making or becoming.	1. xã hội 2. hoá	Family and peers both influence socialization.
429	birth-rate	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: birth + rate. Study the complete expression as one field-specific unit.	Tỷ lệ	Improved education and health access can affect a country's birth-rate.
430	death-rate	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: death + rate. Study the complete expression as one field-specific unit.	1. Tỷ lệ 2. người 3. chết	A clean-water program lowered the community's death-rate from disease.
431	fertility-rate	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: fertility + rate. Study the complete expression as one field-specific unit.	tỷ lệ sinh sản	Demographers use the fertility-rate to project future population change.
432	life-expectancy	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: life + expectancy. Study the complete expression as one field-specific unit.	tuổi thọ	Vaccination and sanitation helped increase life-expectancy.
433	ethnocentrism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. chủng 2. thuyết 3. dân tộc	Ethnocentrism can cause people to misunderstand unfamiliar customs.
434	cultural-relativism	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: cultural + relativism. Study the complete expression as one field-specific unit.	thuyết tương đối về văn hóa	Cultural-relativism asks researchers to understand a ritual before judging it.
435	bureaucracy	noun Study Field: Grade 8 history, civics, and social science word Word study: Root and suffix focus: -cracy relates to rule or a system of government.	1. bọn quan liêu 2. bộ máy quan liêu 3. Quan lại	The agency's bureaucracy requires applications to pass through several departments.
436	public-policy	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: public + policy. Study the complete expression as one field-specific unit.	chính sách công	The city changed public-policy to reduce lead in drinking water.
437	lobbyist	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ist often names a person associated with a field, belief, or practice.	1. Người 2. vận động 3. hành lang	The environmental lobbyist urged lawmakers to protect the wetland.
438	interest-group	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: interest + group. Study the complete expression as one field-specific unit.	nhóm lợi ích	A consumer interest-group supported stronger product-safety rules.
439	political-party	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: political + party. Study the complete expression as one field-specific unit.	đảng phái chính trị	The political-party published its priorities before the election.
440	platform	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: platform is the dictionary headword; compare its inflected or derived forms in context.	1. Nền 2. bục 3. bệ	The candidate's platform includes proposals on housing and transportation.
441	moderate	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: moderate is the dictionary headword; compare its inflected or derived forms in context.	1. vừa phải 2. phải chăng	The moderate sought a compromise acceptable to both sides.
442	radical	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: radical is the dictionary headword; compare its inflected or derived forms in context.	cấp tiến	The radical argued that reform was insufficient and demanded a new system.
443	statute	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: statute is the dictionary headword; compare its inflected or derived forms in context.	luật	The statute requires factories to report hazardous spills.
444	plaintiff	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: plaintiff is the dictionary headword; compare its inflected or derived forms in context.	1. nguyên cáo 2. nguyên đơn 3. người	The plaintiff sought payment for damage to her property.
445	defendant	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: defendant is the dictionary headword; compare its inflected or derived forms in context.	1. bị cáo 2. bị đơn 3. Người	The defendant entered a plea at the hearing.
446	prosecution	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -tion commonly forms a noun naming an action, process, or result.	1. Sự 2. theo đuổi 3. tiếp tục	The prosecution introduced evidence connecting the suspect to the theft.
447	defense	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: defense is the dictionary headword; compare its inflected or derived forms in context.	1. phòng thủ 2. 防守 3. phòng ngự	The defense questioned whether the witness could see clearly.
448	jury	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: jury is the dictionary headword; compare its inflected or derived forms in context.	1. bồi thẩm đoàn 2. hội thẩm 3. bồi thẩm	The jury examined the evidence before reaching a verdict.
449	subpoena	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: subpoena is the dictionary headword; compare its inflected or derived forms in context.	1. trát tòa 2. Trát 3. hầu	The court issued a subpoena for the missing financial records.
450	civic-duty	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: civic + duty. Study the complete expression as one field-specific unit.	nghĩa vụ công dân	Serving on a jury is a civic-duty.

Page 19: words 451–475

Vocabulary page 19
#	Word	Details	Meaning	Sample sentence
451	common-good	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: common + good. Study the complete expression as one field-specific unit.	lợi ích chung	The council argued that clean public parks serve the common-good.
452	rule-of-law	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: rule + of + law. Study the complete expression as one field-specific unit.	pháp quyền	An independent court helps protect the rule-of-law.
453	natural-rights	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: natural + rights. Study the complete expression as one field-specific unit.	quyền tự nhiên	Enlightenment thinkers described life and liberty as natural-rights.
454	popular-sovereignty	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: popular + sovereignty. Study the complete expression as one field-specific unit.	chủ quyền nhân dân	Elections are one way citizens exercise popular-sovereignty.
455	limited-government	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: limited + government. Study the complete expression as one field-specific unit.	chính phủ hạn chế	A bill of rights supports limited-government by protecting individual freedoms.
456	representative-government	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: representative + government. Study the complete expression as one field-specific unit.	chính phủ đại diện	In a representative-government, citizens hold elected officials accountable.
457	direct-democracy	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: direct + democracy. Study the complete expression as one field-specific unit.	dân chủ trực tiếp	A local referendum is an example of direct-democracy.
458	constitutional-monarchy	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: constitutional + monarchy. Study the complete expression as one field-specific unit.	chế độ quân chủ lập hiến	In a constitutional-monarchy, the monarch does not govern with unlimited authority.
459	autocracy	noun Study Field: Grade 8 history, civics, and social science word Word study: Root and suffix focus: -cracy relates to rule or a system of government.	1. Chế độ 2. chuyên 3. quyền	The autocracy censored newspapers that criticized the ruler.
460	charter	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: charter is the dictionary headword; compare its inflected or derived forms in context.	hiến chương	The royal charter authorized the colony's government.
461	covenant	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: covenant is the dictionary headword; compare its inflected or derived forms in context.	1. Hiệp 2. thoả 3. khoản	The communities signed a covenant promising to share water during droughts.
462	commonwealth	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: commonwealth is the dictionary headword; compare its inflected or derived forms in context.	1. Toàn thể 2. nhân dân	The constitution described the state as a commonwealth.
463	confederation	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. bang liên 2. 邦聯 3. Liên minh	The early confederation struggled to collect national revenue.
464	federation	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. Sự 2. thành lập 3. liên đoàn	The provinces joined a federation while retaining local legislatures.
465	bicameral	adjective Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: bicameral is the dictionary headword; compare its inflected or derived forms in context.	lưỡng viện	The national parliament is bicameral, with an upper and a lower house.
466	unicameral	adjective Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: unicameral is the dictionary headword; compare its inflected or derived forms in context.	đơn viện	The region uses a unicameral legislature.
467	veto	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: veto is the dictionary headword; compare its inflected or derived forms in context.	1. Quyền 2. phủ quyết 3. bác bỏ	The governor used a veto to block the bill.
468	override	verb Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: override is the dictionary headword; compare its inflected or derived forms in context.	1. Cưỡi 2. ngựa 3. kiệt lực	A sufficient legislative majority can override the veto.
469	impeachment	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	1. việc luận tội 2. cuộc luận tội 3. việc đàn hặc	The constitution assigns the lower chamber responsibility for impeachment.
470	agency	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: agency is the dictionary headword; compare its inflected or derived forms in context.	1. Tác dụng 2. lực	The environmental agency monitors air pollution.
471	department	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	1. tỉnh 2. Cục 3. sở	The health department opened a vaccination clinic.
472	administration	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. hành chính 2. trông nom 3. quản lý	The administration proposed a revised national budget.
473	Electoral College	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Electoral + College. Study the complete expression as one field-specific unit.	cử tri đoàn	Each state receives a number of votes in the Electoral College.
474	primary-election	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: primary + election. Study the complete expression as one field-specific unit.	bầu cử sơ bộ	Voters selected the nominee during the primary-election.
475	general-election	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: general + election. Study the complete expression as one field-specific unit.	tổng tuyển cử	The winning candidate took office after the general-election.

Designing a Fair Charter

Reading practice for pages 19–20. Five relevant words are highlighted.

English reading

Students draft a town charter based on popular-sovereignty, so authority begins with the people. The charter protects natural-rights and establishes limited-government. It also supports the rule-of-law, requiring leaders and citizens alike to follow rules created for the common-good.

Vietnamese translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. Where does authority begin?

Under popular sovereignty, authority begins with the people.

2. What limits the leaders?

Limited government and the rule of law limit leaders.

3. What should the rules promote?

The rules should promote the common good.

Page 20: words 476–500

Vocabulary page 20
#	Word	Details	Meaning	Sample sentence
476	caucus	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: caucus is the dictionary headword; compare its inflected or derived forms in context.	cuộc họp kín	Local party members debated their priorities at the caucus.
477	precinct	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: precinct is the dictionary headword; compare its inflected or derived forms in context.	1. Khoảng 2. rào 3. đất	The school gym served as the polling place for our precinct.
478	apportionment	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ment commonly forms a noun for an action, process, state, or result.	1. Sự 2. từng 3. phần	The census provides population totals used for apportionment.
479	redistricting	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: redistricting is the dictionary headword; compare its inflected or derived forms in context.	tái phân chia khu vực	Population shifts led the state to begin redistricting.
480	gerrymandering	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: gerrymandering is the dictionary headword; compare its inflected or derived forms in context.	1. sắp xếp 2. gian lận 3. bầu cử	The oddly shaped map raised concerns about gerrymandering.
481	Columbian Exchange	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Columbian + Exchange. Study the complete expression as one field-specific unit.	Sàn giao dịch Columbia	The Columbian Exchange brought potatoes to Europe and horses to the Americas.
482	encomienda	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: encomienda is the dictionary headword; compare its inflected or derived forms in context.	1. chế độ encomienda 2. encomienda	The encomienda exploited Indigenous communities for colonial production.
483	indentured-servitude	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: indentured + servitude. Study the complete expression as one field-specific unit.	khế ước-nô lệ	Through indentured-servitude, some migrants exchanged years of labor for transportation.
484	Middle Passage	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Middle + Passage. Study the complete expression as one field-specific unit.	Đoạn giữa	Captive people endured brutal conditions during the Middle Passage.
485	abolitionist	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ist often names a person associated with a field, belief, or practice.	1. Người 2. chủ nghĩa 3. bãi	The abolitionist published eyewitness accounts to build opposition to slavery.
486	Underground Railroad	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Underground + Railroad. Study the complete expression as one field-specific unit.	Đường sắt ngầm	Conductors in the Underground Railroad provided shelter and directions.
487	nullification	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. Sự 2. huỷ bỏ 3. làm	The nullification crisis tested the balance between state and federal power.
488	states' rights	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: states' + rights. Study the complete expression as one field-specific unit.	quyền của các bang	The debate over states' rights shaped arguments about federal authority.
489	cotton-gin	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: cotton + gin. Study the complete expression as one field-specific unit.	hạt bông	The cotton-gin increased the speed of cotton processing.
490	plantation	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ation commonly forms a noun naming an action, process, or result.	1. đồn điền 2. Vườn ươm	The plantation produced sugar for overseas markets.
491	sharecropping	noun Study Field: Grade 8 history, civics, and social science word Word study: Base-form focus: sharecropping is the dictionary headword; compare its inflected or derived forms in context.	sự chia sẻ	Sharecropping often trapped families in cycles of debt.
492	tenant-farming	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: tenant + farming. Study the complete expression as one field-specific unit.	tá điền	Under tenant-farming, the family paid cash rent for its fields.
493	Jim Crow	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Jim + Crow. Study the complete expression as one field-specific unit.	1. chế độ Jim Crow 2. hệ thống phân biệt chủng tộc Jim Crow	Jim Crow denied Black citizens equal access to public facilities.
494	Black Codes	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Black + Codes. Study the complete expression as one field-specific unit.	Mã đen	Black Codes limited movement, work, and civil rights.
495	Freedmen's Bureau	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Freedmen's + Bureau. Study the complete expression as one field-specific unit.	Văn phòng của những người được giải phóng	The Freedmen's Bureau supported schools and helped negotiate labor contracts.
496	transcontinental-railroad	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: transcontinental + railroad. Study the complete expression as one field-specific unit.	đường sắt xuyên lục địa	The transcontinental-railroad reduced travel time across the United States.
497	Gold Rush	proper noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: Gold + Rush. Study the complete expression as one field-specific unit.	Cơn sốt vàng	The Gold Rush transformed small settlements into crowded towns.
498	manorialism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. Chế độ 2. thái	Under manorialism, the manor produced much of what its residents used.
499	absolutism	noun Study Field: Grade 8 history, civics, and social science word Word study: Suffix focus: -ism often names a belief, system, movement, or practice.	1. Sự 2. chuyên chế 3. chính thể	Royal absolutism weakened representative institutions.
500	divine right	noun Study Field: Grade 8 history, civics, and social science word Word study: Term structure: divine + right. Study the complete expression as one field-specific unit.	quyền thiêng liêng	Supporters of divine right argued that subjects should not challenge the king.

Sources and curriculum references

These references guide selection and calibration. Definitions, sample sentences, readings, questions, and teaching notes are independently written and reviewed.