English Vocabulary · Grade 5 Live Review Preview

5th Grade Vocabulary Words

Fifth-grade readers use increasingly precise vocabulary to compare sources, explain evidence, interpret literature, and learn independently across science, mathematics, and social studies. The curriculum emphasizes context clues, meaningful word parts, parts of speech, and language that strengthens both discussion and writing.

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. References calibrated level and coverage only; all learner-facing definitions and sample sentences are original KSSR copy.

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Complete text list

All 500 words are included below as ordinary HTML. This view does not require JavaScript.

Page 1: words 1–25

Vocabulary page 1
#	Word	Pattern / part of speech	Meaning	Sample sentence
1	accomplish	verbGrade 5 academic word	សម្រេច	Careful planning helped the volunteers accomplish their goal before sunset.
2	achievement	nounGrade 5 academic word	សមិទ្ធិផល	Finishing her first long novel was a proud achievement for Lena.
3	adapt	verbGrade 5 academic word	សម្រួល	Desert plants adapt to dry conditions by storing water.
4	adequate	adjectiveGrade 5 academic word	មធ្យម	The hikers carried an adequate supply of water for the afternoon.
5	allocate	verbGrade 5 academic word	បម្រុងទុក	The council will allocate part of the budget to playground repairs.
6	alternate	verbGrade 5 academic word	ជំនួស	We alternate between reading silently and discussing the chapter.
7	anticipate	verbGrade 5 academic word	ដឹងជាមុនពី	Farmers anticipate frost when the temperature drops sharply.
8	appeal	nounGrade 5 academic word	អំពាវនាវ	The mystery's unexpected ending added to its appeal.
9	assign	verbGrade 5 academic word	1. ផ្ដល់ 2. ផ្ដល់តម្លៃ	The director will assign each actor a role in the play.
10	category	nounGrade 5 academic word	1. ចំពូក 2. ប្រភេទ	Place each rock in a category based on how it formed.
11	combine	verbGrade 5 academic word	ផ្សំ	We combine flour and water to make the dough.
12	complex	adjectiveGrade 5 academic word	ល្បះផ្សំ/ប្រយោគផ្សំ	The complex machine uses dozens of gears to keep time.
13	concept	nounGrade 5 academic word	សមានញាណ	The model helped us understand the concept of gravity.
14	consequence	nounGrade 5 academic word	1. ផលវិបាក 2. វិបាក	One consequence of the drought was a smaller wheat harvest.
15	construct	verbGrade 5 academic word	កសាង	The engineers will construct a footbridge across the creek.
16	contrast	verbGrade 5 academic word	កម្រិតពណ៌	The essay will contrast life in a village with life in a large city.
17	deliberate	adjectiveGrade 5 academic word	ចេតនា	Her deliberate choice of strong evidence improved the argument.
18	dependable	adjectiveGrade 5 academic word	អាចទុកចិត្តបាន។	The dependable bus arrives at the same time each morning.
19	determine	verbGrade 5 academic word	ប្តេជ្ញានឹង	The test will determine whether the water is safe to drink.
20	distinguish	verbGrade 5 academic word	បែងចែក	The field guide helps readers distinguish hawks from falcons.
21	diverse	adjectiveGrade 5 academic word	1. ផ្សេងៗ 2. ដោយឡែក	A diverse forest contains plants of many sizes and species.
22	efficient	adjectiveGrade 5 academic word	មានប្រសិទ្ធភាព	The efficient oven uses less electricity while cooking food evenly.
23	elaborate	adjectiveGrade 5 academic word	ល្អិតល្អន់	The parade featured an elaborate float covered with paper flowers.
24	encounter	verbGrade 5 academic word	ជួបប្រទះ	Hikers may encounter deer near the meadow at dawn.
25	establish	verbGrade 5 academic word	1. បង្កើត 2. ស្ថាបនា 3. ចាក់គ្រឹះ	Residents hope to establish a weekly farmers' market.

Building a Rain Garden

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

English reading

The garden club studies the concept of collecting rainwater. Members construct a shallow basin beside the playground and plant grasses in it. If they accomplish their plan, less water will flood the path. That consequence will make their achievement useful to the whole school.

Khmer translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What concept does the club study?

The club studies collecting rainwater.

2. What do members construct?

They construct a shallow planted basin.

3. What consequence do they expect?

They expect less water to flood the path.

Cloze vocabulary quiz

1. The model helped us understand the ___ of gravity.

Answer: concept

2. Careful planning helped the volunteers ___ their goal before sunset.

Answer: accomplish

3. One ___ of the drought was a smaller wheat harvest.

Answer: consequence

4. Finishing her first long novel was a proud ___ for Lena.

Answer: achievement

5. The engineers will ___ a footbridge across the creek.

Answer: construct

Page 2: words 26–50

Vocabulary page 2
#	Word	Pattern / part of speech	Meaning	Sample sentence
26	evaluate	verbGrade 5 academic word	វាយតម្លៃ	The judges evaluate each design for strength and originality.
27	expand	verbGrade 5 academic word	ពង្រីក	The writer will expand the final paragraph with another example.
28	expectation	nounGrade 5 academic word	សង្ឈឹមគណិត	Our expectation of clear skies changed when thunder began.
29	factor	nounGrade 5 academic word	កត្តា	Daily sunlight is an important factor in plant growth.
30	function	nounGrade 5 academic word	1. មុខងារ 2. អនុគមន៍ 3. តួនាទី	The roots' main function is to absorb water and anchor the plant.
31	illustrate	verbGrade 5 academic word	គូររូប	The diagram will illustrate how water moves through the cycle.
32	infer	verbGrade 5 academic word	សន្និដ្ឋាន	From the wet paw prints, we infer that the dog entered through the kitchen.
33	interpret	verbGrade 5 academic word	បកប្រែ	Students interpret the graph by comparing the heights of its bars.
34	majority	nounGrade 5 academic word	1. ភាគច្រើន 2. ភាពច្រើន	A majority of the class voted for the outdoor activity.
35	motivate	verbGrade 5 academic word	លើកទឹកចិត្ត	A clear goal can motivate a team to keep practicing.
36	perspective	nounGrade 5 academic word	យថាទស្សន៍	The diary presents the voyage from a young sailor's perspective.
37	procedure	nounGrade 5 academic word	បែបបទ	Follow the safety procedure before starting the experiment.
38	reaction	nounGrade 5 academic word	ប្រតិកម្ម	Maya's surprised reaction showed that she had not expected the gift.
39	refer	verbGrade 5 academic word	នាំ	The directions refer readers to the map on the next page.
40	sequence	nounGrade 5 academic word	លំដាប់	Put the pictures in sequence from seed to flowering plant.
41	significant	adjectiveGrade 5 academic word	1. សំខាន់ 2. ជាក់លាក់ 3. ច្បាស់លាស់	The discovery was significant because it changed what scientists understood.
42	sufficient	adjectiveGrade 5 academic word	វេជ្ជសាស្ត្រ) គ្រប់គ្រាន់	One flashlight provided sufficient light for the small tent.
43	supportive	adjectiveGrade 5 academic word	គាំទ្រ	Her supportive teammates cheered after every attempt.
44	surroundings	nounGrade 5 academic word	ជុំវិញ	The owl's brown feathers blend with its woodland surroundings.
45	tendency	nounGrade 5 academic word	ទំនោរ	The river has a tendency to rise after several days of rain.
46	approximate	adjectiveGrade 5 academic word	ប្រហែល	The approximate distance to the lake is three kilometers.
47	confident	adjectiveGrade 5 academic word	ទំនុកចិត្ត	After rehearsing, Amir felt confident about giving his speech.
48	reliable	adjectiveGrade 5 academic word	អាចទុកចិត្តបាន	We used a reliable weather source before planning the trip.
49	require	verbGrade 5 academic word	ទាមទារ	The recipe will require two cups of chopped apples.
50	strategy	nounGrade 5 academic word	1. យុទ្ធសាស្ត្រ 2. ក្បួនសឹក 3. ក្បួនយុទ្ធសាស្ត្រ	Checking headings first is a useful reading strategy.

Page 2 vocabulary review

Review five selected words from page 2.

Cloze vocabulary quiz

1. Maya's surprised ___ showed that she had not expected the gift.

Answer: reaction

2. The judges ___ each design for strength and originality.

Answer: evaluate

3. The directions ___ readers to the map on the next page.

Answer: refer

4. The writer will ___ the final paragraph with another example.

Answer: expand

5. Put the pictures in ___ from seed to flowering plant.

Answer: sequence

Page 3: words 51–75

Vocabulary page 3
#	Word	Pattern / part of speech	Meaning	Sample sentence
51	abolish	verbGrade 5 academic word	លុបចោល	The town voted to abolish the outdated parking rule.
52	absurd	adjectiveGrade 5 academic word	1. ផ្ដាស 2. ព្រើល	The absurd rumor claimed that the tiny pond contained a whale.
53	access	nounGrade 5 academic word	1. ចូលដំណើរការ 2. ចូលដំណើរការ	A library card gives residents access to online books.
54	aggressive	adjectiveGrade 5 academic word	ដែលបំពាន	The aggressive goose hissed and charged toward the fence.
55	altitude	nounGrade 5 academic word	ឧព្វេធ	The air becomes thinner as altitude increases.
56	antagonist	nounGrade 5 academic word	គូបដិបក្ខ អ្នកប្រឆាំង	In the novel, the dishonest captain is the antagonist.
57	antonym	nounGrade 5 academic word	1. ន័យផ្ទុយ 2. បដិសព្ទ	The word “scarce” is an antonym of “abundant.”
58	anxious	adjectiveGrade 5 academic word	1. ចំពាក់ចិត្ត 2. កំពល់ 3. កង្វល់	Dev felt anxious while waiting for news about the missing dog.
59	aroma	nounGrade 5 academic word	ក្លិនក្រអូប	The warm bread filled the kitchen with a sweet aroma.
60	astound	verbGrade 5 academic word	ភ្ញាក់ផ្អើល	The magician's final illusion will astound the audience.
61	avalanche	nounGrade 5 academic word	ផ្ទាំងទឹកកក	The avalanche blocked the road through the mountain pass.
62	banquet	nounGrade 5 academic word	ពិធីជប់លៀង	The community held a banquet to honor the rescue workers.
63	beverage	nounGrade 5 academic word	1. គ្រឿងផឹក 2. ភេសជ្ជៈ	Tea was the warm beverage served after the winter walk.
64	bland	adjectiveGrade 5 academic word	ស្លូត	The soup tasted bland until we added herbs.
65	blizzard	nounGrade 5 academic word	ព្យុះព្រិល	The blizzard buried the road beneath deep snow.
66	bungle	verbGrade 5 academic word	បឹង	Rushing may cause us to bungle the final measurements.
67	cautiously	adverbGrade 5 academic word	ដោយប្រុងប្រយ័ត្ន	The fox stepped cautiously onto the frozen pond.
68	companion	nounGrade 5 academic word	1. ដៃគូ 2. សហការី 3. សហការី ដៃគូ គូកន	The guide's faithful dog was his companion on every hike.
69	compassion	nounGrade 5 academic word	1. មេត្តាធម៌ 2. មេត្តា 3. ចិត្តក្តុកក្តួល ចិត្តក្តួលអាណិត	Neighbors showed compassion by bringing meals to the injured family.
70	compensate	verbGrade 5 academic word	សម្របសម្រួល	The store will compensate customers for the damaged goods.
71	comply	verbGrade 5 academic word	អនុលោម	Cyclists must comply with the trail's safety signs.
72	compose	verbGrade 5 academic word	1. រៀបរៀង 2. តែង	Jada will compose a short melody for the school play.
73	convert	verbGrade 5 academic word	បម្លែង	Solar panels convert sunlight into electrical energy.
74	courteous	adjectiveGrade 5 academic word	គួរសម	The courteous visitor waited until the speaker finished.
75	debate	nounGrade 5 academic word	1. ជជែក 2. ពិភាក្សា	The class held a debate about protecting the empty lot.

Page 3 vocabulary review

Review five selected words from page 3.

Cloze vocabulary quiz

1. The town voted to ___ the outdated parking rule.

Answer: abolish

2. The soup tasted ___ until we added herbs.

Answer: bland

3. The ___ rumor claimed that the tiny pond contained a whale.

Answer: absurd

4. The ___ buried the road beneath deep snow.

Answer: blizzard

5. A library card gives residents ___ to online books.

Answer: access

Page 4: words 76–100

Vocabulary page 4
#	Word	Pattern / part of speech	Meaning	Sample sentence
76	decline	verbGrade 5 academic word	បដិសេធ	The frog population may decline if the pond dries up.
77	dedicate	verbGrade 5 academic word	ឧទ្ទិស ឆ្លង ប្រារព្ធពិធីឆ្លង	The volunteers dedicate each Saturday to restoring the trail.
78	deprive	verbGrade 5 academic word	កៀ	Clouds can deprive young plants of necessary sunlight.
79	detect	verbGrade 5 academic word	រកឃើញ	The alarm can detect smoke before flames appear.
80	dictate	verbGrade 5 academic word	បង្គាប់	The reporter will dictate notes to an assistant by phone.
81	document	verbGrade 5 academic word	ឯកសារ	Scientists document each bird sighting in a field journal.
82	duplicate	verbGrade 5 academic word	1. ស្ទួន 2. ច្បាប់ចម្លង	The printer can duplicate the photograph in seconds.
83	edible	adjectiveGrade 5 academic word	អាចបរិភោគបាន។	Only some of the berries in this forest are edible.
84	escalate	verbGrade 5 academic word	កើនឡើង	A small disagreement can escalate when no one listens.
85	evade	verbGrade 5 academic word	គេច	The quick rabbit tried to evade the circling hawk.
86	exasperate	verbGrade 5 academic word	ហួសចិត្ត	Repeated interruptions can exasperate a patient speaker.
87	excavate	verbGrade 5 academic word	ជីក	Archaeologists excavate the site with small tools and brushes.
88	exert	verbGrade 5 academic word	ប្រើប្រាស់	Climbers must exert extra force on the steep slope.
89	exhibit	verbGrade 5 academic word	1. បង្ហាញ 2. អេនុទស្សន៏	The museum will exhibit tools from the early settlement.
90	exult	verbGrade 5 academic word	រីករាយ	Fans began to exult when the final goal secured the victory.
91	feeble	adjectiveGrade 5 academic word	ខ្សោយ	A feeble beam of light shone through the dusty window.
92	frigid	adjectiveGrade 5 academic word	ត្រជាក់	Frigid air froze the puddles overnight.
93	gigantic	adjectiveGrade 5 academic word	1. សម្បើម 2. ចង្គ្រោង 3. អ៊ូង	A gigantic whale surfaced beside the research boat.
94	gorge	nounGrade 5 academic word	ជ្រលងភ្នំ	The river flows through a rocky gorge.
95	guardian	nounGrade 5 academic word	អាណាព្យាបាល	Her guardian signed the permission form for the trip.
96	hazy	adjectiveGrade 5 academic word	អ័ព្ទ	The distant hills looked hazy through the morning fog.
97	hearty	adjectiveGrade 5 academic word	ពិរោះ	The hikers ate a hearty stew after the long climb.
98	homonym	nounGrade 5 academic word	1. កល្បពាក្យ 2. សទិសសព្ទ	“Bat” is a homonym because it can name an animal or a piece of sports equipment.
99	identical	adjectiveGrade 5 academic word	1. ដូចបេះបិទ 2. ដូចគ្នាបេះបិទ	The two keys looked identical, but only one opened the door.
100	illuminate	verbGrade 5 academic word	បំភ្លឺ	A lantern will illuminate the dark path.

The Museum Exhibit

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

English reading

Volunteers dedicate a new exhibit to the town’s musicians. Ticket sales decline during a snowy week, but the curator refuses to deprive families of a final viewing day. The volunteers exult when the museum fills on Saturday.

Khmer translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. To whom is the exhibit dedicated?

The exhibit is dedicated to the town's musicians.

2. Why do ticket sales decline?

Snowy weather causes ticket sales to decline.

3. When do volunteers exult?

They exult when the museum fills.

Cloze vocabulary quiz

1. The frog population may ___ if the pond dries up.

Answer: decline

2. The museum will ___ tools from the early settlement.

Answer: exhibit

3. The volunteers ___ each Saturday to restoring the trail.

Answer: dedicate

4. Fans began to ___ when the final goal secured the victory.

Answer: exult

5. Clouds can ___ young plants of necessary sunlight.

Answer: deprive

Page 5: words 101–125

Vocabulary page 5
#	Word	Pattern / part of speech	Meaning	Sample sentence
101	independent	adjectiveGrade 5 language and literature word	ឯករាជ	The independent researcher planned and completed her own investigation.
102	industrious	adjectiveGrade 5 language and literature word	ខំប្រឹងធ្វើការ	The industrious ants carried food back to their nest.
103	intense	adjectiveGrade 5 language and literature word	ខ្លាំង	The intense heat forced the runners to shorten their practice.
104	intercept	verbGrade 5 language and literature word	ចំណុចប្រសព្វអ័ក្ស	The defender managed to intercept the pass.
105	jubilation	nounGrade 5 language and literature word	ភាពរីករាយ	Jubilation filled the stadium after the unexpected victory.
106	kin	nounGrade 5 language and literature word	ញាតិ	The young wolf remained close to its kin.
107	luxurious	adjectiveGrade 5 language and literature word	ប្រណិត	The hotel offered a luxurious room overlooking the harbor.
108	major	adjectiveGrade 5 language and literature word	ចម្បង	Repairing the bridge was a major project for the town.
109	miniature	adjectiveGrade 5 language and literature word	ខ្នាតតូច	The exhibit included a miniature model of the castle.
110	minor	adjectiveGrade 5 language and literature word	រង	A minor scratch did not affect how the machine worked.
111	mischief	nounGrade 5 language and literature word	ទុច្ចរិត	The puppy's mischief left muddy paw prints across the floor.
112	monarch	nounGrade 5 language and literature word	ព្រះមហាក្សត្រ	The monarch addressed the nation from the palace.
113	moral	nounGrade 5 language and literature word	ខាងសីលធម៌ នៃសីលធម៌	The fable's moral warns readers not to be greedy.
114	myth	nounGrade 5 language and literature word	1. ទេវកថា 2. រឿងព្រេង រឿងនិទានដែលទាក់ទងនឹងប្រពៃណីបុរាណ	The ancient myth tells how the stars reached the sky.
115	narrator	nounGrade 5 language and literature word	អ្នកនិទានរឿង	The narrator knows what every character is thinking.
116	navigate	verbGrade 5 language and literature word	រុករក	Sailors use charts and stars to navigate across the ocean.
117	negative	adjectiveGrade 5 language and literature word	អវិជ្ជមាន្ម	The critic gave a negative review of the confusing performance.
118	nonchalant	adjectiveGrade 5 language and literature word	មិនចេះខ្វល់ខ្វាយ	Ravi sounded nonchalant even though the contest result mattered to him.
119	obsolete	adjectiveGrade 5 language and literature word	លែងប្រើ	The old machine became obsolete after digital equipment arrived.
120	occasion	nounGrade 5 language and literature word	ឱកាស	The family saved the decorated dishes for a special occasion.
121	overthrow	verbGrade 5 language and literature word	ផ្ដួលរំលំ	The rebels hoped to overthrow the cruel ruler.
122	pardon	verbGrade 5 language and literature word	ការលើកលែងទោស ការអត់ទោស	The governor may pardon a prisoner after reviewing the case.
123	pasture	nounGrade 5 language and literature word	1. តិណភូមិ 2. វាលស្មៅ	The horses grazed peacefully in the pasture.
124	pedestrian	nounGrade 5 language and literature word	1. ចរក 2. ថ្មើរជើង	The driver stopped to let a pedestrian cross the street.
125	perish	verbGrade 5 language and literature word	វិនាស	Young seedlings may perish without water.

Page 5 vocabulary review

Review five selected words from page 5.

Cloze vocabulary quiz

1. The ancient ___ tells how the stars reached the sky.

Answer: myth

2. The ___ ants carried food back to their nest.

Answer: industrious

3. The ___ knows what every character is thinking.

Answer: narrator

4. The ___ heat forced the runners to shorten their practice.

Answer: intense

5. Sailors use charts and stars to ___ across the ocean.

Answer: navigate

Page 6: words 126–150

Vocabulary page 6
#	Word	Pattern / part of speech	Meaning	Sample sentence
126	petrify	verbGrade 5 language and literature word	Petrify	The sudden growl seemed to petrify the campers.
127	portable	adjectiveGrade 5 language and literature word	ចល័ត	We used a portable stove to cook at the campsite.
128	prefix	nounGrade 5 language and literature word	បុព្វបទ	The prefix “un-” changes “certain” to “uncertain.”
129	preserve	verbGrade 5 language and literature word	1. គាំពារ 2. អភិរក្ស	The archive works to preserve letters from the town's founders.
130	protagonist	nounGrade 5 language and literature word	តួឯក តួអង្គសំខាន់	The protagonist must choose between safety and helping a friend.
131	provide	verbGrade 5 language and literature word	ផ្ដល់	Tall trees provide shade beside the playground.
132	purchase	verbGrade 5 language and literature word	ទិញ	The club will purchase new art supplies with the fundraiser money.
133	realistic	adjectiveGrade 5 language and literature word	ប្រាកដនិយម	The artist painted a realistic portrait of the old fisherman.
134	reassure	verbGrade 5 language and literature word	ធ្វើអោយមានការទុកចិត្ដ	The guide tried to reassure us that the trail was safe.
135	reign	nounGrade 5 language and literature word	រជ្ជកាល	The palace was expanded during the queen's reign.
136	resemble	verbGrade 5 language and literature word	ស្រដៀង	The cloud seemed to resemble a sailing ship.
137	retain	verbGrade 5 language and literature word	ចាប់មកវិញ	Dark soil can retain water longer than sand.
138	retire	verbGrade 5 language and literature word	1. ចូលនិវត្តន៍ 2. រ៉ឺត្រែត	The librarian plans to retire after forty years of service.
139	revert	verbGrade 5 language and literature word	1. ត្រឡប់ដូចដើម 2. ត្រឡប់ទៅដើម	Without maintenance, the garden may revert to an overgrown field.
140	route	nounGrade 5 language and literature word	ផ្លូវ	The map shows the safest route across the mountains.
141	saunter	verbGrade 5 language and literature word	សូនទ័រ	We watched the peacock saunter across the courtyard.
142	seldom	adverbGrade 5 language and literature word	មិនសូវ	Snow seldom falls in this warm coastal town.
143	senseless	adjectiveGrade 5 language and literature word	គ្មានអារម្មណ៍	Damaging the new playground would be a senseless act.
144	sever	verbGrade 5 language and literature word	សឺវើរ	The storm may sever weak branches from the tree.
145	slither	verbGrade 5 language and literature word	រអិល	A green snake began to slither through the grass.
146	sluggish	adjectiveGrade 5 language and literature word	យឺត	The lizard seemed sluggish in the cool morning air.
147	soar	verbGrade 5 language and literature word	ហក់ឡើង	The eagle began to soar above the canyon.
148	solitary	adjectiveGrade 5 language and literature word	នៅលីវ	A solitary lighthouse stood on the rocky island.
149	solo	nounGrade 5 language and literature word	ទោល	Mina practiced her violin solo for the concert.
150	sparse	adjectiveGrade 5 language and literature word	ខ្ចាត់ខ្ចាយ	Only sparse grass grew on the dry hillside.

Page 6 vocabulary review

Review five selected words from page 6.

Cloze vocabulary quiz

1. Without maintenance, the garden may ___ to an overgrown field.

Answer: revert

2. We used a ___ stove to cook at the campsite.

Answer: portable

3. The map shows the safest ___ across the mountains.

Answer: route

4. The ___ “un-” changes “certain” to “uncertain.”

Answer: prefix

5. We watched the peacock ___ across the courtyard.

Answer: saunter

Page 7: words 151–175

Vocabulary page 7
#	Word	Pattern / part of speech	Meaning	Sample sentence
151	spurt	verbGrade 5 language and literature word	ផ្ទុះ	Water began to spurt from the cracked pipe.
152	suffix	nounGrade 5 language and literature word	បច្ច័យ	The suffix “-less” changes “hope” into “hopeless.”
153	suffocate	verbGrade 5 language and literature word	ថប់ដង្ហើម	Smoke can suffocate people inside a closed room.
154	summit	nounGrade 5 language and literature word	1. ចម 2. កំពូល 3. កោណន្ត	The climbers reached the summit before noon.
155	suspend	verbGrade 5 language and literature word	ផ្អាក	Workers suspend the bridge deck from thick steel cables.
156	synonym	nounGrade 5 language and literature word	1. ន័យដូច 2. វេវចនៈ 3. វេវចនសព្ទ	“Rapid” is a synonym for “quick.”
157	talon	nounGrade 5 language and literature word	តាឡុង	The hawk gripped the branch with each curved talon.
158	taunt	verbGrade 5 language and literature word	ការចំអក	It is unkind to taunt a player who misses a shot.
159	thrifty	adjectiveGrade 5 language and literature word	សន្សំសំចៃ	The thrifty cook turned leftover vegetables into soup.
160	translate	verbGrade 5 language and literature word	1. បកប្រែ 2. ប្រែ	Students will translate the short message from French into English.
161	tropical	adjectiveGrade 5 language and literature word	ត្រូពិច	Colorful parrots live in the tropical forest.
162	visible	adjectiveGrade 5 language and literature word	1. មើលឃើញ 2. អាចមើលឃើញ 3. អាចមើលឃើញ	The lighthouse became visible when the fog lifted.
163	visual	adjectiveGrade 5 language and literature word	នៃចក្ខុ	A visual chart made the instructions easier to follow.
164	vivid	adjectiveGrade 5 language and literature word	រស់រវើក	The author used vivid details to describe the storm.
165	wilderness	nounGrade 5 language and literature word	ទីរហោស្ថាន	The protected wilderness contains forests, rivers, and mountains.
166	withdraw	verbGrade 5 language and literature word	ការដកចេញ	The injured runner had to withdraw from the race.
167	crucial	adjectiveGrade 5 language and literature word	1. សំខាន់ 2. ចាំបាច់	Clean water is crucial to every community's health.
168	emerge	verbGrade 5 language and literature word	បំផុស	A butterfly will emerge from the chrysalis.
169	overcome	verbGrade 5 language and literature word	យកឈ្នះ	With practice, Jayla began to overcome her fear of speaking.
170	perplex	verbGrade 5 language and literature word	ឆ្ងល់	The puzzle's missing clue continued to perplex the detectives.
171	beckon	verbGrade 5 language and literature word	ប៊ីកខុន	The guide raised one hand to beckon us toward the entrance.
172	bestow	verbGrade 5 language and literature word	1. ជូន 2. ផ្តល់ជូន	The mayor will bestow a medal on the brave rescuer.
173	intently	adverbGrade 5 language and literature word	ដោយចេតនា	The fox watched intently as the mouse crossed the field.
174	solemn	adjectiveGrade 5 language and literature word	ដ៏ឧឡារិក	The crowd remained solemn during the memorial ceremony.
175	culture	nounGrade 5 language and literature word	វប្បធម៌	Music and food are important parts of a community's culture.

A Summit in the Wilderness

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

English reading

On a wilderness hike, Priya notices that the word fearless has a suffix. At the summit, smoke drifts from a distant fire. Because smoke can suffocate people, the guide decides to withdraw the group to a lower, clearer trail.

Khmer translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What word part does Priya notice?

Priya notices a suffix.

2. What appears near the summit?

Smoke from a distant fire appears.

3. Why does the guide withdraw the group?

The guide withdraws them because smoke can suffocate people.

Cloze vocabulary quiz

1. The ___ “-less” changes “hope” into “hopeless.”

Answer: suffix

2. The protected ___ contains forests, rivers, and mountains.

Answer: wilderness

3. Smoke can ___ people inside a closed room.

Answer: suffocate

4. The injured runner had to ___ from the race.

Answer: withdraw

5. The climbers reached the ___ before noon.

Answer: summit

Page 8: words 176–200

Vocabulary page 8
#	Word	Pattern / part of speech	Meaning	Sample sentence
176	infuriate	verbGrade 5 language and literature word	ខឹងសម្បារ	Cheating in the final match would infuriate the other players.
177	population	nounGrade 5 language and literature word	1. ប្រជាជន 2. ប្រជាគណន៍ 3. ប៉ូពុយឡាស្យ៉ុង	The island's seabird population increased after nesting areas were protected.
178	resource	nounGrade 5 language and literature word	ធនធាន	The encyclopedia is a valuable resource for the research project.
179	thrive	verbGrade 5 language and literature word	1. ឥតដាច់ 2. មករហូត កិ	Tomato plants thrive in warm sunlight.
180	assure	verbGrade 5 language and literature word	ធានា	The coach tried to assure the team that their preparation was strong.
181	comprehend	verbGrade 5 language and literature word	យល់	The timeline helped us comprehend the order of historical events.
182	exaggerate	verbGrade 5 language and literature word	បំផ្លើស	Do not exaggerate the size of the fish you caught.
183	ignorant	adjectiveGrade 5 language and literature word	ល្ងង់ខ្លៅ	We were ignorant of the trail closure until we saw the sign.
184	trial	nounGrade 5 language and literature word	1. បរីក្សា 2. ការសាកល្បង	Surviving three nights in the storm was a severe trial.
185	summon	verbGrade 5 language and literature word	1. កោះហៅ 2. និមន្ត	The captain will summon the crew when the ship is ready.
186	tolerate	verbGrade 5 language and literature word	អត់ធ្មត់	These plants can tolerate a few nights of cold weather.
187	vague	adjectiveGrade 5 language and literature word	មិនច្បាស់លាស់	The vague directions did not explain which road to take.
188	blurt	verbGrade 5 language and literature word	ព្រិលៗ	Nina tried not to blurt the surprise before the party.
189	criticize	verbGrade 5 language and literature word	រិះគន់	A helpful reviewer can criticize the argument without insulting the writer.
190	flimsy	adjectiveGrade 5 language and literature word	ទន់ខ្សោយ	The flimsy box collapsed under the heavy books.
191	favorable	adjectiveGrade 5 language and literature word	អំណោយផល	Favorable winds carried the sailboat toward the harbor.
192	mimic	verbGrade 5 language and literature word	ចំឡែកខាងធ្វើត្រាប់សម្ដី និងកិរិយានៃ	The parrot can mimic the sound of a ringing phone.
193	ridicule	verbGrade 5 language and literature word	ចំអក	No student should ridicule another person's accent.
194	trait	nounGrade 5 language and literature word	លក្ខណៈ	Patience is a useful trait for a careful scientist.
195	utter	verbGrade 5 language and literature word	1. ពោល 2. បន្លឺ	The startled child could barely utter a word.
196	adjust	verbGrade 5 language and literature word	1. លៃតម្រូវ 2. លៃតម្រូវ	Please adjust the microscope until the image is clear.
197	approve	verbGrade 5 language and literature word	យល់ព្រម	The committee must approve the plan before construction begins.
198	conduct	verbGrade 5 language and literature word	1. ប្រព្រឹត្តិទៅ 2. ធ្វើទៅ 3. កើតឡើង កិ	Researchers will conduct a survey about recycling habits.
199	conflict	nounGrade 5 language and literature word	1. ជម្លោះ 2. កលហ 3. ប៉ះទង្គិច	The characters resolve their conflict by speaking honestly.
200	equivalent	adjectiveGrade 5 language and literature word	សមមូល	Two quarters are equivalent to one half.

Page 8 vocabulary review

Review five selected words from page 8.

Cloze vocabulary quiz

1. The island's seabird ___ increased after nesting areas were protected.

Answer: population

2. The ___ box collapsed under the heavy books.

Answer: flimsy

3. The encyclopedia is a valuable ___ for the research project.

Answer: resource

4. ___ winds carried the sailboat toward the harbor.

Answer: favorable

5. Tomato plants ___ in warm sunlight.

Answer: thrive

Page 9: words 201–225

Vocabulary page 9
#	Word	Pattern / part of speech	Meaning	Sample sentence
201	likely	adjectiveGrade 5 language and literature word	1. ទំនង 2. ប្រហែលជា 3. ដូចជា	Dark clouds make rain likely this afternoon.
202	vital	adjectiveGrade 5 language and literature word	វីតាល់	Oxygen is vital for human survival.
203	claim	nounGrade 5 language and literature word	1. រាប់ 2. ចាត់ទុក	The writer supports each claim with facts from reliable sources.
204	context	nounGrade 5 language and literature word	បរិបទ	The context shows that “bank” refers to the side of a river.
205	debris	nounGrade 5 language and literature word	កំទេចកំទី	Workers cleared storm debris from the road.
206	eerie	adjectiveGrade 5 language and literature word	ស្រើបស្រាល	An eerie howl echoed through the empty valley.
207	graphic	adjectiveGrade 5 language and literature word	ក្រាហ្វិក	The graphic novel combines dialogue with illustrated panels.
208	investigate	verbGrade 5 language and literature word	1. ពិរុទ្ធ 2. តាមដាន	Detectives investigate the footprints beside the broken window.
209	irregular	adjectiveGrade 5 language and literature word	មិនទៀងទាត់	The stone has an irregular shape with five uneven sides.
210	rustle	verbGrade 5 language and literature word	ច្រែះ	A rabbit made the grass rustle beside the path.
211	scrawny	adjectiveGrade 5 language and literature word	ស្លេកស្លាំង	The scrawny kitten grew stronger after several weeks of care.
212	wage	nounGrade 5 language and literature word	1. ប្រាក់ខែ 2. បរិលាភ 3. ទិនិកា	The farm pays each worker an hourly wage.
213	affect	verbGrade 5 language and literature word	1. ជះឥទ្ធិពល 2. ប៉ះពាល់	A long drought can affect the price of vegetables.
214	despair	nounGrade 5 language and literature word	អស់សង្ឃឹម	The stranded sailors felt despair when the radio stopped working.
215	external	adjectiveGrade 5 language and literature word	ក្រៅ	The turtle's external shell protects its body.
216	gleam	verbGrade 5 language and literature word	រីករាយ	Wet stones gleam in the morning sun.
217	internal	adjectiveGrade 5 language and literature word	ខាងក្នុង	The mechanic inspected the engine's internal parts.
218	peril	nounGrade 5 language and literature word	គ្រោះថ្នាក់	The climbers faced peril when the ice began to crack.
219	restrict	verbGrade 5 language and literature word	ដាក់កម្រិត	Park rules restrict campfires during dry weather.
220	secure	verbGrade 5 language and literature word	1. មានសុវត្ថិភាព 2. ដែលមានសុវត្ថិភាព	Use strong rope to secure the canoe to the dock.
221	summary	nounGrade 5 language and literature word	1. សង្ខេប 2. សង្ខេបរឿង	Her summary included the article's central point and key evidence.
222	coax	verbGrade 5 language and literature word	លួងលោម	We used a treat to coax the frightened dog out from under the porch.
223	enhance	verbGrade 5 language and literature word	1. ធ្វើឲ្យប្រសើរឡើង 2. ធ្វើឲ្យប្រសើរ	A labeled map can enhance the report.
224	familiar	adjectiveGrade 5 language and literature word	ស្និទ្ធថ្នឹក គុ	The familiar song reminded him of summer camp.
225	ferocious	adjectiveGrade 5 language and literature word	សាហាវ	Ferocious winds tore branches from the trees.

Page 9 vocabulary review

Review five selected words from page 9.

Cloze vocabulary quiz

1. The turtle's ___ shell protects its body.

Answer: external

2. The writer supports each ___ with facts from reliable sources.

Answer: claim

3. Wet stones ___ in the morning sun.

Answer: gleam

4. The ___ shows that “bank” refers to the side of a river.

Answer: context

5. The mechanic inspected the engine's ___ parts.

Answer: internal

Page 10: words 226–250

Vocabulary page 10
#	Word	Pattern / part of speech	Meaning	Sample sentence
226	murky	adjectiveGrade 5 language and literature word	ល្អក់	The pond water became murky after the storm.
227	restrain	verbGrade 5 language and literature word	1. បញ្ឈប់ 2. បង្អង់	A leash helps restrain a dog near a busy road.
228	sorrowful	adjectiveGrade 5 language and literature word	ទុក្ខព្រួយ	The sorrowful ending left many readers in tears.
229	sympathy	nounGrade 5 language and literature word	សមានចិត្ត ការជួយរំលើកទុក្ខ	We expressed sympathy to the family after their loss.
230	grim	adjectiveGrade 5 language and literature word	ក្រៀមក្រំ	The rescue team faced grim conditions in the flooded valley.
231	erupt	verbGrade 5 language and literature word	ផ្ទុះ	A volcano may erupt after pressure builds below the surface.
232	insist	verbGrade 5 language and literature word	ទទូច	The guide will insist that everyone wear a helmet.
233	sneer	verbGrade 5 language and literature word	ស្រមោច	The villain began to sneer at the hero's simple plan.
234	tuft	nounGrade 5 language and literature word	ធូហ្វ	A white tuft of fur clung to the fence.
235	unravel	verbGrade 5 language and literature word	ស្រាយ	The detective used the diary to unravel the mystery.
236	envious	adjectiveGrade 5 language and literature word	ច្រណែន	Leo felt envious of his friend's new bicycle.
237	influence	nounGrade 5 language and literature word	1. ឥទ្ធិពល 2. ការជះឥទ្ធិពល	The coach's encouragement had a positive influence on the team.
238	prohibit	verbGrade 5 language and literature word	1. ដាក់បំរាម 2. ប្រាបប្រាម 3. ហាមប្រាម	The signs prohibit swimming near the waterfall.
239	pry	verbGrade 5 language and literature word	ព្រី	We used a flat tool to pry the lid from the paint can.
240	regret	verbGrade 5 language and literature word	1. ស្តាយគំនិត 2. នឹកស្តាយក្រោយ 3. ស្ដាយ	I regret leaving the seedlings outside during the frost.
241	wring	verbGrade 5 social-emotional word	1. ច្បាច់ 2. ពូត	Wring the wet cloth over the sink before hanging it.
242	confide	verbGrade 5 social-emotional word	ជឿជាក់	Mara chose to confide her worry to a close friend.
243	dread	verbGrade 5 social-emotional word	ខ្លាច	Some passengers dread flying during storms.
244	glimpse	nounGrade 5 social-emotional word	ក្រឡេកមើល	We caught a glimpse of the fox before it vanished.
245	glisten	verbGrade 5 social-emotional word	ភ្លឺ	Drops of rain glisten on the spiderweb.
246	isolate	verbGrade 5 social-emotional word	1. ដាច់ឆ្ងាយ 2. ដាច់ស្រយាល	Scientists isolate the sick plant to protect the healthy ones.
247	option	nounGrade 5 social-emotional word	1. ជំរើស 2. ជម្រើស	Taking the bus is an option when the road is icy.
248	smirk	verbGrade 5 social-emotional word	ញញឹម	The bully began to smirk after hiding the missing notebook.
249	affection	nounGrade 5 social-emotional word	សេចក្តីស្រលាញ់	The dog showed affection by resting its head on Mina's knee.
250	empathy	nounGrade 5 social-emotional word	ការយល់ចិត្ត	Reading the refugee's diary helped students develop empathy.

An Honest Apology

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

English reading

After spilling paint on a friend’s poster, Luis feels deep regret. He begins to wring the stained paper, but that only tears it. Looking sorrowful, he chooses to confide in his teacher. She shows sympathy and helps both students make a repair.

Khmer translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. Why does Luis feel regret?

Luis spilled paint on a friend's poster.

2. Why should he not wring the paper?

Wringing the paper tears it.

3. In whom does Luis confide?

Luis confides in his teacher.

Cloze vocabulary quiz

1. I ___ leaving the seedlings outside during the frost.

Answer: regret

2. The ___ ending left many readers in tears.

Answer: sorrowful

3. ___ the wet cloth over the sink before hanging it.

Answer: wring

4. We expressed ___ to the family after their loss.

Answer: sympathy

5. Mara chose to ___ her worry to a close friend.

Answer: confide

Page 11: words 251–275

Vocabulary page 11
#	Word	Pattern / part of speech	Meaning	Sample sentence
251	integrity	nounGrade 5 social-emotional word	បូរណភាព ភាពត្រឹមត្រូវ ភាពស្អាតស្អំ ភាពទៀងត្រង់ «ចិត្តស្មោះត្រង់ កូល៉ុស ៣:២២»	Returning the extra change showed Carlos's integrity.
252	patience	nounGrade 5 social-emotional word	ការអំណត់	Growing a garden requires patience because seeds develop slowly.
253	responsibility	nounGrade 5 social-emotional word	ការទទួលខុសត្រូវ	Feeding the class fish is Hana's responsibility this week.
254	cooperation	nounGrade 5 social-emotional word	សហប្រតិបត្តិ	The heavy table was moved safely through cooperation.
255	determination	nounGrade 5 social-emotional word	ការកំណត់	Her determination helped her finish the steep climb.
256	curiosity	nounGrade 5 social-emotional word	ការចង់ដឹងចង់ឃើញ	Curiosity led the children to examine the unusual shell.
257	fairness	nounGrade 5 social-emotional word	យុត្តិធម៌	The referee's fairness earned respect from both teams.
258	loyalty	nounGrade 5 social-emotional word	ភក្តីភាព ចិត្តស្មោះស័្មគ្រ	The guide praised the dog's loyalty to its owner.
259	gratitude	nounGrade 5 social-emotional word	កតញ្ញុតា	We wrote notes of gratitude to the volunteers.
260	tolerance	nounGrade 5 social-emotional word	ការយោគយល់ ការអធ្យាស្រ័យ	A respectful community practices tolerance toward different traditions.
261	perseverance	nounGrade 5 social-emotional word	អធ្យោគ ការស៊ូទ្រាំ សេចក្ដីខ្ជាប់ខ្ជួន	Solving the complicated puzzle required perseverance.
262	frustration	nounGrade 5 social-emotional word	ការខកចិត្ត	Repeated computer errors caused understandable frustration.
263	disappointment	nounGrade 5 social-emotional word	ការខកចិត្ត	The canceled trip brought disappointment to the campers.
264	enthusiasm	nounGrade 5 social-emotional word	ភាពរីករាយ	Her enthusiasm for astronomy inspired the whole club.
265	embarrassment	nounGrade 5 social-emotional word	អាម៉ាស់	He laughed at his embarrassment after realizing his shirt was backward.
266	hesitation	nounGrade 5 social-emotional word	ការស្ទាក់ស្ទើរ	After a moment of hesitation, Priya stepped onto the stage.
267	jealousy	nounGrade 5 social-emotional word	1. ប្រចណ្ឌ 2. ឥច្ឆា 3. ឥស្សា	Jealousy made the character ignore her friend's success.
268	loneliness	nounGrade 5 social-emotional word	ឯកា	Joining the club helped ease his loneliness.
269	relief	nounGrade 5 social-emotional word	ក្បាច់	We felt relief when the lost hikers returned safely.
270	resentment	nounGrade 5 social-emotional word	ការអាក់អន់ចិត្ត	Unequal chores created resentment between the roommates.
271	satisfaction	nounGrade 5 social-emotional word	ការស្កប់ព្រះហឫទ័យ ការគាប់ព្រះហឫទ័យ	Completing the mural gave the artists great satisfaction.
272	considerate	adjectiveGrade 5 social-emotional word	ពិចារណា	It was considerate of Mae to lower her voice near the sleeping baby.
273	courageous	adjectiveGrade 5 social-emotional word	ក្លាហាន	The courageous witness told the truth despite feeling afraid.
274	deceitful	adjectiveGrade 5 social-emotional word	បោកបញ្ឆោត	The deceitful merchant hid the crack beneath a label.
275	determined	adjectiveGrade 5 social-emotional word	កំណត់	The determined runner continued through the heavy rain.

Page 11 vocabulary review

Review five selected words from page 11.

Cloze vocabulary quiz

1. Feeding the class fish is Hana's ___ this week.

Answer: responsibility

2. After a moment of ___, Priya stepped onto the stage.

Answer: hesitation

3. The heavy table was moved safely through ___.

Answer: cooperation

4. ___ made the character ignore her friend's success.

Answer: jealousy

5. Her ___ helped her finish the steep climb.

Answer: determination

Page 12: words 276–300

Vocabulary page 12
#	Word	Pattern / part of speech	Meaning	Sample sentence
276	dishonest	adjectiveGrade 5 social-emotional word	ទុច្ចរិត	The dishonest player secretly changed the score.
277	enthusiastic	adjectiveGrade 5 social-emotional word	រីករាយ	The enthusiastic volunteers arrived early with extra supplies.
278	impatient	adjectiveGrade 5 social-emotional word	មិនចេះអត់ធ្មត់	The impatient customer kept checking the clock.
279	respectful	adjectiveGrade 5 social-emotional word	មានគារវៈ	A respectful listener does not interrupt.
280	selfish	adjectiveGrade 5 social-emotional word	អាត្មានិយម	The selfish character kept all the food for himself.
281	thoughtful	adjectiveGrade 5 social-emotional word	គិត	Her thoughtful question helped the speaker explain the issue.
282	cautious	adjectiveGrade 5 social-emotional word	ប្រយ័ត្ន	The cautious climber tested each handhold.
283	cooperative	adjectiveGrade 5 social-emotional word	សហករណ៍	The cooperative group divided the research tasks fairly.
284	decisive	adjectiveGrade 5 social-emotional word	សម្រេចចិត្ត	The decisive captain changed course before the storm arrived.
285	devoted	adjectiveGrade 5 social-emotional word	លះបង់	The devoted nurse checked on every patient.
286	embarrassed	adjectiveGrade 5 social-emotional word	អៀនខ្លួន	Kai felt embarrassed after calling the teacher by the wrong name.
287	encouraging	adjectiveGrade 5 social-emotional word	ការលើកទឹកចិត្ត	The coach's encouraging words helped the team recover.
288	forgiving	adjectiveGrade 5 social-emotional word	ការអភ័យទោស	Her forgiving response allowed the friends to begin again.
289	resourceful	adjectiveGrade 5 social-emotional word	មានធនធាន	The resourceful campers repaired the strap with cord and tape.
290	selfless	adjectiveGrade 5 social-emotional word	មិនគិតខ្លួនឯង	The selfless volunteer gave her seat to the tired passenger.
291	trustworthy	adjectiveGrade 5 social-emotional word	ជាពិត	A trustworthy guide admits when a route is uncertain.
292	polite	adjectiveGrade 5 social-emotional word	1. ចេះគួរសម 2. គួរសម	The polite guest thanked the host before leaving.
293	arrogant	adjectiveGrade 5 social-emotional word	1. កំអួក 2. ក្រអឺត	The arrogant champion refused to congratulate the other team.
294	compassionate	adjectiveGrade 5 social-emotional word	មេត្តា	The compassionate doctor listened carefully to the frightened child.
295	demanding	adjectiveGrade 5 social-emotional word	ទាមទារ	Training for the long race was demanding.
296	gloomy	adjectiveGrade 5 social-emotional word	1. ស្រអាប់ 2. អាប់រស្មី	The gray sky gave the empty street a gloomy appearance.
297	guilty	adjectiveGrade 5 social-emotional word	មានទោស	The guilty child admitted breaking the vase.
298	jealous	adjectiveGrade 5 social-emotional word	1. ប្រច័ណ្ឌ 2. ច្រណែន	Nia felt jealous when her friend won the solo.
299	miserable	adjectiveGrade 5 social-emotional word	វេទនា	The soaked hikers felt miserable in the cold wind.
300	optimistic	adjectiveGrade 5 social-emotional word	សុទិដ្ឋិនិយម	The optimistic gardener believed the damaged plants would recover.

Page 12 vocabulary review

Review five selected words from page 12.

Cloze vocabulary quiz

1. The ___ customer kept checking the clock.

Answer: impatient

2. A ___ guide admits when a route is uncertain.

Answer: trustworthy

3. A ___ listener does not interrupt.

Answer: respectful

4. The ___ guest thanked the host before leaving.

Answer: polite

5. The ___ character kept all the food for himself.

Answer: selfish

Page 13: words 301–325

Vocabulary page 13
#	Word	Pattern / part of speech	Meaning	Sample sentence
301	pessimistic	adjectiveGrade 5 social-emotional word	ទុទិដ្ឋិនិយម	The pessimistic sailor doubted that the wind would improve.
302	reluctant	adjectiveGrade 5 social-emotional word	1. រអាដៃ 2. អល់អែក	The reluctant puppy stopped at the edge of the water.
303	sincere	adjectiveGrade 5 social-emotional word	1. ស្មោះ 2. សច្ចំ	Her sincere apology helped repair the friendship.
304	adaptation	nounGrade 5 science word	1. ធម្មជាតិវិទ្យា) បន្ស៊ាំ (ការធ្វើអោយស៊ាំ 2. ការផ្ស៊ាំ 3. ការតំរូវ	A camel's ability to conserve water is an adaptation to desert life.
305	organism	nounGrade 5 science word	ភាវរស់	Every organism in the pond depends on water.
306	habitat	nounGrade 5 science word	ទីជម្រក	The marsh provides a habitat for frogs and herons.
307	ecosystem	nounGrade 5 science word	1. អាស្រយប្រព័ន្ធ 2. បរិស្ថានប្រព័ន្ធ	Removing one species can affect the entire ecosystem.
308	species	nounGrade 5 science word	ប្រភេទ	The island supports a rare species of lizard.
309	community	nounGrade 5 science word	1. សហគមន៍ 2. ជុំជន (សៀម	The reef community includes coral, fish, and algae.
310	consumer	nounGrade 5 science word	អ្នកប្រើប្រាស់	A rabbit is a consumer that feeds on plants.
311	decomposer	nounGrade 5 science word	អ្នកបំបែក	A mushroom acts as a decomposer on the forest floor.
312	producer	nounGrade 5 science word	ផលិតករ	Grass is a producer that uses sunlight to make food.
313	nutrient	nounGrade 5 science word	សារធាតុចិញ្ចឹម	Iron is a nutrient that helps blood carry oxygen.
314	photosynthesis	nounGrade 5 science word	រស្មីសំយោគ	During photosynthesis, leaves release oxygen.
315	respiration	nounGrade 5 science word	ការដកដង្ហើម	Cellular respiration provides energy for growth and movement.
316	germination	nounGrade 5 science word	ដំណុះ	Warm soil and water encourage germination.
317	pollination	nounGrade 5 science word	លំអង	Bees help with pollination as they visit flowers.
318	reproduction	nounGrade 5 science word	ការបន្តពូជ	Flowering plants use seeds for reproduction.
319	inherited	adjectiveGrade 5 science word	ទទួលមរតក	Eye color is an inherited trait.
320	instinct	nounGrade 5 science word	សភាវគតិ	Migration is an instinct in many bird species.
321	behavior	nounGrade 5 science word	1. ចរិយា 2. កិរិយា 3. ចរិត	The scientist recorded the penguin's feeding behavior.
322	cell	nounGrade 5 science word	1. កោសិកា 2. ក្រឡា	A microscope can reveal the structure of a plant cell.
323	tissue	nounGrade 5 science word	ជាលិកា	Muscle tissue contracts to move the body.
324	organ	nounGrade 5 science word	1. សរីរាង្គ 2. អង្គ	The heart is an organ that pumps blood.
325	system	nounGrade 5 science word	ប្រព័ន្ធ	The digestive system breaks food into usable nutrients.

A Reluctant Scientist

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

English reading

Mina is reluctant to present her beetle model because she feels pessimistic about it. Her partner gives sincere encouragement. Together they explain how each adaptation helps the organism survive in a dry habitat.

Khmer translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. Why is Mina reluctant to present?

Mina doubts the quality of her model.

2. What does her partner offer?

Her partner offers sincere encouragement.

3. What do the adaptations help the organism do?

They help the organism survive.

Page 14: words 326–350

Vocabulary page 14
#	Word	Pattern / part of speech	Meaning	Sample sentence
326	skeleton	nounGrade 5 science word	គ្រោងឆ្អឹង	A whale's skeleton contains bones shaped like those in other mammals.
327	muscle	nounGrade 5 science word	សាច់ដុំ	The heart is a powerful muscle.
328	circulation	nounGrade 5 science word	ឈាមរត់	Exercise can increase blood circulation.
329	digestion	nounGrade 5 science word	1. ការរំលាយអាហារ 2. ជីរណា	Digestion begins when food is chewed.
330	microorganism	nounGrade 5 science word	អតិសុខុមកាយ	Some kinds of microorganism help produce yogurt.
331	bacteria	nounGrade 5 science word	បាក់តេរី	Helpful bacteria live in healthy soil.
332	virus	nounGrade 5 science word	1. វីសាណូ 2. វីរុស 3. មេរោគ	A virus can spread through cough droplets.
333	fungus	nounGrade 5 science word	ផ្សិត	The damp log was covered by a pale fungus.
334	parasite	nounGrade 5 science word	1. បរាសិត 2. បញ្ញើក្អែក	A tick is a parasite that feeds on an animal's blood.
335	immunity	nounGrade 5 science word	អភ័យឯកសិទ្ធិ	Vaccination can help the body develop immunity.
336	vaccine	nounGrade 5 science word	វ៉ាក់សាំង	The vaccine reduced the spread of the illness.
337	infection	nounGrade 5 science word	ដំបៅក្លាយ	The doctor treated the cut to prevent infection.
338	symptom	nounGrade 5 science word	1. រោគសញ្ញា 2. សញ្ញា	A high fever can be a symptom of infection.
339	treatment	nounGrade 5 science word	ការព្យាបាល	Rest was part of the recommended treatment.
340	recover	verbGrade 5 science word	1. ជាសះស្បើយ 2. យកបានវិញ	The injured bird may recover after several weeks of care.
341	contagious	adjectiveGrade 5 science word	ឆ្លង	The contagious illness moved quickly through the crowded camp.
342	hygiene	nounGrade 5 science word	អនាម័យ	Good hand hygiene helps prevent infection.
343	molecule	nounGrade 5 science word	1. អណូ 2. ម៉ូលេគុល	A water molecule contains hydrogen and oxygen atoms.
344	atom	nounGrade 5 science word	1. បរមាណូ 2. អាតូម	An atom contains a nucleus surrounded by electrons.
345	element	nounGrade 5 science word	ធាតុ	Oxygen is an element found in air and water.
346	compound	nounGrade 5 science word	សមាសធាតុ	Water is a compound made from hydrogen and oxygen.
347	mixture	nounGrade 5 science word	ល្បាយ ន	Trail mix is a mixture whose ingredients remain separate.
348	dissolve	verbGrade 5 science word	រំលាយ	Salt will dissolve more quickly in warm water.
349	chemical	nounGrade 5 science word	គីមី	The label identifies each chemical in the cleaning solution.
350	mineral	nounGrade 5 science word	1. រ៉ែខនិជ 2. ខនិជ	Quartz is a common mineral in Earth's crust.

Page 15: words 351–375

Vocabulary page 15
#	Word	Pattern / part of speech	Meaning	Sample sentence
351	mass	nounGrade 5 science word	1. ម៉ាស 2. អភិបូជា (កាតូលិក)	The balance measures the rock's mass in grams.
352	volume	nounGrade 5 science word	1. មាឌ 2. កម្រិតសំឡេង 3. កម្រិតសម្លេង	We found the box's volume by multiplying its length, width, and height.
353	density	nounGrade 5 science word	ដង់ស៊ីតេ	Oil floats because its density is lower than water's.
354	energy	nounGrade 5 science word	ថាមពល	Food provides energy for the body.
355	force	nounGrade 5 science word	1. កម្លាំងទាញ 2. បង្ខំ	The force of the kick sent the ball across the field.
356	motion	nounGrade 5 science word	ចលនា	The camera recorded the cart's motion down the ramp.
357	friction	nounGrade 5 science word	ការរង្កៀសចិត្តគ្នា	Friction between the tires and road helps the bicycle stop.
358	magnetism	nounGrade 5 science word	មេដែក	Magnetism pulled the iron paper clips toward the bar.
359	electricity	nounGrade 5 science word	1. ភ្លើង 2. អគ្គិសនី 3. ហ្វៃហ្វា	The wind turbine generates electricity.
360	circuit	nounGrade 5 science word	សៀគ្វី	The bulb lights when the circuit is closed.
361	conductor	nounGrade 5 science word	អង្គធាតុចម្លង	Copper is a good conductor of electricity.
362	insulator	nounGrade 5 science word	អ៊ីសូឡង់	Rubber is an insulator used around electric wires.
363	reflection	nounGrade 5 science word	ការឆ្លុះបញ្ចាំង	The mirror formed an image through reflection.
364	refraction	nounGrade 5 science word	ចំណាំងបែរ	Refraction makes the straw appear bent in water.
365	vibration	nounGrade 5 science word	រំញ័រ	The string's vibration produces a musical sound.
366	frequency	nounGrade 5 science word	ប្រេកង់	A higher sound frequency produces a higher pitch.
367	wavelength	nounGrade 5 science word	1. ជំហានរលក 2. ប្រវែងរលក 3. ប្រវែងរលក	Red light has a longer wavelength than violet light.
368	spectrum	nounGrade 5 science word	វិសាលគម	A prism separates white light into a spectrum.
369	transparent	adjectiveGrade 5 science word	ថ្លា	The transparent glass revealed the fish inside the tank.
370	translucent	adjectiveGrade 5 science word	ល្អក់	The translucent curtain softened the sunlight.
371	opaque	adjectiveGrade 5 science word	ស្រអាប់	The opaque wall blocked all light from the next room.
372	solid	nounGrade 5 science word	1. អង្គធាតុរឹង 2. តាន់	Ice is the solid form of water.
373	liquid	nounGrade 5 science word	1. វត្ថុរាវ 2. សូរលំហូរ/សូរបង្ហូរ	A liquid takes the shape of its container.
374	state	nounGrade 5 science word	1. រដ្ឋ 2. ស្ថានភាព	Heating can change water from a liquid state to a gas.
375	evaporation	nounGrade 5 science word	រំហួតទឹក	Evaporation slowly dried the puddle.

Page 16: words 376–400

Vocabulary page 16
#	Word	Pattern / part of speech	Meaning	Sample sentence
376	condensation	nounGrade 5 science word	ការខាប់	Condensation formed droplets on the cold glass.
377	precipitation	nounGrade 5 science word	ទឹកភ្លៀង	The forecast predicts heavy precipitation overnight.
378	humidity	nounGrade 5 science word	1. សំណើម 2. សន្សើម	High humidity made the warm day feel uncomfortable.
379	atmosphere	nounGrade 5 science word	បរិយាកាស	Earth's atmosphere contains the oxygen people breathe.
380	weathering	nounGrade 5 science word	អាកាសធាតុ	Repeated freezing and thawing cause weathering.
381	erosion	nounGrade 5 science word	សំណឹក	Tree roots can slow erosion on a steep slope.
382	sediment	nounGrade 5 science word	ដីល្បាប់	The river left a layer of sediment along its banks.
383	fossil	nounGrade 5 science word	1. ហ្វូស៊ីល 2. បាសាណីភូត	The rock contained a fossil of a small shell.
384	glacier	nounGrade 5 science word	ផ្ទាំងទឹកកក	The glacier carved a wide valley as it moved.
385	earthquake	nounGrade 5 science word	រញ្ជួយផែនដី	The earthquake damaged buildings near the fault.
386	fault	nounGrade 5 science word	ទោស	Pressure built along the fault before the earthquake.
387	tectonic	adjectiveGrade 5 science word	1. ដែលរចិតវិវត្ត 2. នៃរចិតវិវត្តន៍	Tectonic plates move only a few centimeters each year.
388	volcano	nounGrade 5 science word	ភ្នំភ្លើង	The volcano released steam from its summit.
389	canyon	nounGrade 5 science word	អន្លង់	The river flows along the bottom of the canyon.
390	plateau	nounGrade 5 science word	ខ្ពង់រាប	The village sits on a plateau above the valley.
391	delta	nounGrade 5 science word	ដែលតា	The river formed a fertile delta beside the sea.
392	basin	nounGrade 5 science word	1. អាងទន្លេ 2. អាង	Rain from the entire basin flows toward the main river.
393	renewable	adjectiveGrade 5 science word	អាចបន្តបាន។	Sunlight is a renewable source of energy.
394	nonrenewable	adjectiveGrade 5 science word	មិនអាចកកើតឡើងវិញបាន។	Coal is a nonrenewable resource.
395	conservation	nounGrade 5 science word	ការអភិរក្ស	Water conservation becomes especially important during drought.
396	pollution	nounGrade 5 science word	ការបំពុល	Air pollution can make breathing difficult.
397	environment	nounGrade 5 science word	1. បរិស្ថាន 2. មជ្ឈដ្ឋាន 3. បរិយាការ	Plastic waste harms the ocean environment.
398	recycle	verbGrade 5 science word	កែច្នៃឡើងវិញ	The factory can recycle old glass into new bottles.
399	biodegradable	adjectiveGrade 5 science word	ដែលអាចបំបែកបាន	Leaves are biodegradable and can become compost.
400	sustainable	adjectiveGrade 5 science word	និរន្តរភាព	The farm uses sustainable methods to protect the soil.

Water in the Air

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

English reading

Warm water raises the humidity inside a sealed jar. Water vapor enters the cooler upper atmosphere of the jar, where condensation forms droplets. When the drops fall like precipitation, they strike a sugar cube and slowly model weathering.

Khmer translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What raises the humidity?

Warm water raises the humidity.

2. Where does condensation form?

Condensation forms near the cooler top of the jar.

3. What process does the sugar cube model?

The sugar cube models weathering.

Page 17: words 401–425

Vocabulary page 17
#	Word	Pattern / part of speech	Meaning	Sample sentence
401	agriculture	nounGrade 5 science word	កសិកម្ម	Agriculture provides food and materials for communities.
402	irrigation	nounGrade 5 science word	ប្រព័ន្ធធារាសាស្រ្ត	Drip irrigation carries water directly to plant roots.
403	fraction	nounGrade 5 mathematics word	ប្រភាគ	The shaded fraction of the circle is three fourths.
404	decimal	nounGrade 5 mathematics word	ទសភាគ	The decimal 0.5 represents one half.
405	percentage	nounGrade 5 mathematics word	ចំនួនភាគរយ	The percentage of blue marbles is sixty because sixty out of every hundred are blue.
406	ratio	nounGrade 5 mathematics word	សមាមាត្រ	The ratio of red beads to blue beads is two to three.
407	proportion	nounGrade 5 mathematics word	1. គណិតវិទ្យា 2. សេដ្ឋកិច្ច) សមាមាត្រ	We used a proportion to find the missing map distance.
408	numerator	nounGrade 5 mathematics word	1. ភាគយក 2. ភាគយក	In three fifths, three is the numerator.
409	denominator	nounGrade 5 mathematics word	1. ភាគបែង 2. ភាគបែង	In three fifths, five is the denominator.
410	product	nounGrade 5 mathematics word	ផលគុណ	The product of six and seven is forty-two.
411	quotient	nounGrade 5 mathematics word	ផលចែក	The quotient of forty and eight is five.
412	remainder	nounGrade 5 mathematics word	សំណល់	Seventeen divided by five has a remainder of two.
413	multiple	nounGrade 5 mathematics word	ច្រើន	Thirty is a multiple of both five and six.
414	prime	adjectiveGrade 5 mathematics word	ជីវវិទ្យា) ធ្វើបូរវកម្ម	Seven is a prime number because only one and seven divide it evenly.
415	composite	adjectiveGrade 5 mathematics word	1. ផ្សំ 2. សមាសធាតុ	Twelve is a composite number with several factor pairs.
416	divisible	adjectiveGrade 5 mathematics word	បែងចែក	Thirty-six is divisible by nine.
417	divisor	nounGrade 5 mathematics word	តួចែក	In twenty divided by four, four is the divisor.
418	exponent	nounGrade 5 mathematics word	និទស្សន្ត	In three squared, the exponent is two.
419	squared	adjectiveGrade 5 mathematics word	ការ៉េ	Five squared equals twenty-five.
420	cubed	adjectiveGrade 5 mathematics word	គូប	Two cubed equals eight.
421	operation	nounGrade 5 mathematics word	ប្រតិបត្តិការ	Choose the correct operation before solving the problem.
422	expression	nounGrade 5 mathematics word	1. សំនួន 2. កន្សោម 3. សំនួន/វិញ្ញត្តិ	The expression six plus four has a value of ten.
423	coordinate	nounGrade 5 mathematics word	កូអរដោនេ	The first coordinate tells how far to move horizontally.
424	axis	nounGrade 5 mathematics word	អ័ក្ស	The horizontal axis shows time in minutes.
425	graph	nounGrade 5 mathematics word	ក្រាហ្វ	The graph shows how temperature changed during the day.

Page 18: words 426–450

Vocabulary page 18
#	Word	Pattern / part of speech	Meaning	Sample sentence
426	ordered	adjectiveGrade 5 mathematics word	បានបញ្ជាទិញ	An ordered pair lists the horizontal coordinate first.
427	quadrant	nounGrade 5 mathematics word	បួនជ្រុង	The point is located in the first quadrant.
428	polygon	nounGrade 5 mathematics word	ពហុកោណ	A hexagon is a polygon with six sides.
429	angle	nounGrade 5 mathematics word	1. មុំ 2. មុម 3. ជ្រុង	A right angle measures ninety degrees.
430	vertex	nounGrade 5 mathematics word	Vertex	The top vertex joins the triangle's two sloping sides.
431	parallel	adjectiveGrade 5 mathematics word	ប៉ារ៉ាឡែល	Opposite sides of a rectangle are parallel.
432	perpendicular	adjectiveGrade 5 mathematics word	កាត់កែង	The vertical post is perpendicular to the ground.
433	triangle	nounGrade 5 mathematics word	ត្រីកោណ	The triangle has one right angle.
434	rectangle	nounGrade 5 mathematics word	ចតុកោណកែង	The classroom floor forms a rectangle.
435	rhombus	nounGrade 5 mathematics word	ចតុកោណស្មើ	The tilted tile is a rhombus rather than a square.
436	trapezoid	nounGrade 5 mathematics word	រាងចតុកោណ	The bridge support forms a trapezoid.
437	circumference	nounGrade 5 mathematics word	រង្វង់	We wrapped string around the lid to measure its circumference.
438	diameter	nounGrade 5 mathematics word	1. អង្កត់ផ្ចិត 2. ទំហំ	The plate's diameter is twice its radius.
439	radius	nounGrade 5 mathematics word	កាំ	The compass was set to a radius of five centimeters.
440	area	nounGrade 5 mathematics word	1. ទំហំ 2. ផ្ទៃ	Multiply length by width to find a rectangle's area.
441	perimeter	nounGrade 5 mathematics word	បរិវេណ	Add all four side lengths to find the garden's perimeter.
442	symmetry	nounGrade 5 mathematics word	ស៊ីមេទ្រី	The butterfly's wings show approximate symmetry.
443	median	nounGrade 5 mathematics word	1. មេដ្យាន 2. សមឌ្ឍរេខា	The median of three, five, and nine is five.
444	mode	nounGrade 5 mathematics word	របៀប	The mode of two, three, three, and five is three.
445	range	nounGrade 5 mathematics word	ជួរ	The range of four, seven, and twelve is eight.
446	data	nounGrade 5 mathematics word	ទិន្នន័យ	We recorded the rainfall data in a table.
447	sample	nounGrade 5 mathematics word	គំរូ	The survey used a sample of fifty residents.
448	probability	nounGrade 5 mathematics word	ប្រូបាប៊ីលីតេ	The probability of rolling an even number is one half.
449	possible	adjectiveGrade 5 mathematics word	1. អាច 2. អាចធ្វើបាន	Rolling a six is possible with a standard number cube.
450	impossible	adjectiveGrade 5 mathematics word	1. មិនអាចទៅរួច 2. ការមិនអាចទៅរួច	It is impossible to roll a seven on a standard six-sided number cube.

Page 19: words 451–475

Vocabulary page 19
#	Word	Pattern / part of speech	Meaning	Sample sentence
451	event	nounGrade 5 mathematics word	ព្រឹត្តិការណ៍	Drawing a red marble is the event we are studying.
452	estimate	nounGrade 5 mathematics word	វោលោកនៈ	Our estimate placed the crowd at about five hundred people.
453	government	nounGrade 5 social studies word	រដ្ឋាភិបាល	The local government maintains roads and parks.
454	democracy	nounGrade 5 social studies word	ប្រជាធិបតេយ្យ	In a democracy, citizens vote in elections.
455	republic	nounGrade 5 social studies word	1. សាធារណរដ្ឋ 2. គណរាជ្យ(ក្លិង្គ	The constitution established the nation as a republic.
456	constitution	nounGrade 5 social studies word	រដ្ឋធម្មនុញ្ញ	The constitution describes the powers of each branch.
457	citizen	nounGrade 5 social studies word	ពលរដ្ឋ	Every citizen may contact elected representatives.
458	citizenship	nounGrade 5 social studies word	សញ្ជាតិ	Responsible citizenship includes learning about public issues.
459	rights	nounGrade 5 social studies word	សិទ្ធិ	The law protects the rights of every voter.
460	duty	nounGrade 5 social studies word	1. ពន្ធគយ 2. គយ ន	Serving on a jury can be a citizen's duty.
461	justice	nounGrade 5 social studies word	យុត្តិធម៌	The court seeks justice by examining evidence carefully.
462	authority	nounGrade 5 social studies word	អំណាច	The city council has authority over local zoning.
463	legislature	nounGrade 5 social studies word	នីតិបញ្ញត្តិ	The state legislature debated the education bill.
464	executive	adjectiveGrade 5 social studies word	1. នីតិប្រតិបត្តិ 2. ដែលប្រតិបត្តិ	The executive branch enforces federal laws.
465	judicial	adjectiveGrade 5 social studies word	តុលាការ	The judicial branch decides how laws apply to cases.
466	congress	nounGrade 5 social studies word	រដ្ឋសភា	Congress considered a bill about national parks.
467	court	nounGrade 5 social studies word	តុលាការ	The court listened to witnesses before reaching a decision.
468	amendment	nounGrade 5 social studies word	វិសោធនកម្ម (ច្បាប់) (សទ្ទានុក្រមសេដ្ឋកិច្ច វិទ្យាស្ថានបណ្ដុះបណ្ដាល និង ស្រាវជ្រាវដើម្បីអភិវឌ្ឍន៍កម្ពុជា បោះពុម្ពនៅខែតុលា ២០០៦	The amendment added a new protection to the constitution.
469	federal	adjectiveGrade 5 social studies word	សហព័ន្ធ	Federal law applies throughout the country.
470	regional	adjectiveGrade 5 social studies word	តំបន់	The regional train connects several nearby cities.
471	municipal	adjectiveGrade 5 social studies word	ក្រុង	The municipal library is funded by the city.
472	policy	nounGrade 5 social studies word	គោលនយោបាយ	The school adopted a policy for reducing food waste.
473	economy	nounGrade 5 social studies word	សេដ្ឋកិច្ច	Tourism supports the island's economy.
474	economic	adjectiveGrade 5 social studies word	សេដ្ឋកិច្ច	The new harbor created economic opportunities.
475	trade	nounGrade 5 social studies word	1. ពាណិជ្ជកម្ម 2. វិស័យពាណិជ្ជកម្ម 3. ការជួញដូរ	River routes allowed trade between distant communities.

Estimating an Election

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

English reading

A mock election is the final event in civics week. Students estimate the turnout before voting for representatives. The activity shows how democracy works in a republic, where citizens choose people to serve in government.

Khmer translation

A reviewed translation is not available for this passage yet.

Reading comprehension

1. What event ends civics week?

A mock election ends civics week.

2. What do students estimate?

They estimate voter turnout.

3. How are democracy and a republic connected?

Citizens in the republic elect representatives to government.

Page 20: words 476–500

Vocabulary page 20
#	Word	Pattern / part of speech	Meaning	Sample sentence
476	commerce	nounGrade 5 social studies word	1. ពាណិជ្ជកម្ម 2. វណិជ្ជា 3. ពាណិជ្ជ	The port became a center of international commerce.
477	import	verbGrade 5 social studies word	នាំចូល	The country must import fruit during the cold season.
478	export	verbGrade 5 social studies word	នាំចេញ	Local farms export coffee to markets overseas.
479	supply	nounGrade 5 social studies word	1. ការផ្គត់ផ្គង់ 2. ផ្គត់ផ្គង់	Heavy rain increased the city's water supply.
480	demand	nounGrade 5 social studies word	តម្រូវការ	Demand for warm coats rises in winter.
481	scarcity	nounGrade 5 social studies word	ភាពខ្វះខាត	Water scarcity forced the town to limit outdoor use.
482	budget	nounGrade 5 social studies word	ថវិកា	The club created a budget before ordering supplies.
483	income	nounGrade 5 social studies word	1. បដិលាភ 2. ចំណូល	Part of her summer income went into savings.
484	expense	nounGrade 5 social studies word	ប្រាក់ចំណាយ	Rent was the family's largest monthly expense.
485	profit	nounGrade 5 social studies word	ផលចំណេញ	The bakery used its profit to buy a larger oven.
486	goods	nounGrade 5 social studies word	1. ទំនិញ 2. អីវ៉ាន់	The train carried goods from inland factories to the port.
487	service	nounGrade 5 social studies word	1. សេវា 2. ការបម្រើ 3. សេវាកម្ម	Bus transportation is a public service.
488	currency	nounGrade 5 social studies word	1. រូបិយវត្ថុ 2. រូបិយប័ណ្ណ	Travelers exchanged their currency before the trip.
489	tax	nounGrade 5 social studies word	1. ពន្ធ 2. តាក់ 3. ភាស៊ី	The sales tax helps fund local services.
490	labor	nounGrade 5 social studies word	ពលកម្ម	Building the stone wall required many hours of labor.
491	industry	nounGrade 5 social studies word	ឧស្សាហកម្ម	Fishing is an important industry in the coastal region.
492	entrepreneur	nounGrade 5 social studies word	សហគ្រិន	The young entrepreneur opened a bicycle repair shop.
493	colony	nounGrade 5 social studies word	អាណានិគម	The distant colony sent raw materials to the ruling nation.
494	colonist	nounGrade 5 social studies word	អាណានិគម	Each colonist had to build shelter before winter.
495	settlement	nounGrade 5 social studies word	1. ការតាំងទីលំនៅ 2. ទូទាត់	The settlement grew beside a reliable water source.
496	independence	nounGrade 5 social studies word	ឯករាជ្យ ន	The nation declared independence after years of conflict.
497	revolution	nounGrade 5 social studies word	ការបដិវត្តន៍	The revolution ended the monarch's rule.
498	treaty	nounGrade 5 social studies word	1. សន្ធិសញ្ញា 2. កតិកាសញ្ញា 3. កតិកា	The treaty established a peaceful border.
499	alliance	nounGrade 5 social studies word	សម្ព័ន្ធមិត្ត ន	The two nations formed an alliance for mutual defense.
500	territory	nounGrade 5 social studies word	1. កន្លែង 2. ទឹកដី	The map shows the territory governed by the northern kingdom.

Sources and curriculum references

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