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Primary 6 PSLE Science Practice Paper 1

Free P6 PSLE Science Practice Paper 1, HY3 AI version, with questions, answers, and PSLE-focused practice for Singapore students.

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Primary 6 PSLE Science AI Generated Generated by Tencent HY3 Free Updated 2026-08-17

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Questions

TuitionGoWhere Practice Paper - Science Primary 6 PSLE

TuitionGoWhere Practice Paper (AI) — Version 1 of 5

Subject: Science
Level: Primary 6 PSLE
Paper: Practice Paper (Topic: Diversity)
Duration: 45 minutes
Total Marks: 40
Name: ______________________
Class: _________
Date: ____________

Instructions:

This practice paper has 20 questions on the topic of Diversity.
Section A: 10 multiple-choice questions (1 mark each).
Section B: 6 short-answer questions (2 marks each).
Section C: 4 structured questions (total 8 marks).
Answer all questions in the spaces provided.
Marks for each question are shown in brackets [ ].

Section A (10 marks)

Choose the correct answer for each question.

1. Which of the following best describes "diversity" among living things? [1]
A) All animals look the same
B) There are many different types of living things with different characteristics
C) Only plants can be classified
D) Diversity means things are exactly alike

2. Which group of organisms can make their own food using light energy? [1]
A) Consumers
B) Decomposers
C) Producers
D) Predators

3. A population is best described as: [1]
A) One rabbit living alone
B) All the grasshoppers of the same kind living in a field
C) A pond and all living things in it
D) Different animals living in a forest

4. Which of the following is an example of a habitat? [1]
A) A single ant
B) A mangrove swamp
C) A food chain
D) A community

5. A cactus has spines instead of broad leaves. This is an example of: [1]
A) A behavioural adaptation
B) A structural adaptation
C) A decomposer role
D) A population change

6. Which of these is a consumer? [1]
A) Grass
B) Mushroom
C) Rabbit
D) Tree

7. In a food chain, energy flows from: [1]
A) Consumer → Producer → Sun
B) Sun → Producer → Consumer
C) Decomposer → Producer → Sun
D) Sun → Consumer → Producer

8. Which of the following is a negative impact of man on the environment? [1]
A) Planting trees
B) Building a nature reserve
C) Deforestation
D) Cleaning a river

9. A community is made up of: [1]
A) Only one type of plant
B) Many populations living together
C) Only decomposers
D) Non-living things only

10. Birds migrating to warmer places in winter is an example of: [1]
A) Structural adaptation
B) Behavioural adaptation
C) A producer's role
D) A decomposer's job

Section B (12 marks)

Answer each question in the space provided.

11. Name two physical characteristics of the environment that can affect whether an organism survives. [2]

12. State the role of decomposers in a food chain and give one example. [2]

13. Explain why a fish has gills instead of lungs. Use the idea of adaptation in your answer. [2]

14. List two positive impacts that man can have on the environment. [2]

15. The diagram below shows a simple food chain. Write the correct labels for P, Q and R.

Diagram for 15 (P6 Science)

Generated diagram for 15.

P: __________ Q: __________ R: __________ [2]

16. Give one structural adaptation and one behavioural adaptation of a lion. [2]

Section C (8 marks)

Answer all parts.

17. A pond habitat has the following organisms: water lilies (plants), tadpoles, frogs, dragonfly larvae, and bacteria.
(a) Which organism is the producer? [1]
(b) Name one consumer in this habitat. [1]
(c) What would happen to the frog population if all the water lilies died? Explain your answer. [2]

18. Study the food web below.

Diagram for 18 (P6 Science)

Generated diagram for 18.

(a) Name two organisms that eat Grass. [1]
(b) If the Snake is removed, explain one possible effect on the Grasshopper population. [2]

19. A student says: "All organisms in a forest are a population." Is she correct? Explain your answer using the correct terms. [2]

20. A new factory pours warm water into a river, making the water warmer than before.
(a) State one way this change may make the environment unfavourable for fish. [1]
(b) Name one action man can take to reduce this negative impact. [1]

End of Paper

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Answers

TuitionGoWhere Practice Paper — Answer Key (Version 1 of 5)

Subject: Science
Level: Primary 6 PSLE
Topic: Diversity
Total Marks: 40

Section A (10 marks)

1. B [1]
Teaching note: Diversity means there are many different living things with different characteristics (e.g., different shapes, sizes, habitats). A, C, D are wrong because they say things are alike or only one group can be classified.

2. C [1]
Teaching note: Producers (usually plants) make their own food using sunlight in photosynthesis. Consumers eat others; decomposers break down dead matter; predators hunt.

3. B [1]
Teaching note: A population is a group of the same kind of organisms living and reproducing together in a place (e.g., all grasshoppers in a field). A is one organism; C is a habitat; D is a community.

4. B [1]
Teaching note: A habitat is the natural home of organisms (e.g., mangrove swamp, pond). A is an organism; C is a feeding relationship; D is a community.

5. B [1]
Teaching note: Spines are a body feature → structural adaptation that reduces water loss in dry places.

6. C [1]
Teaching note: Rabbit eats plants → consumer. Grass and tree are producers; mushroom is decomposer.

7. B [1]
Teaching note: Energy flows Sun → Producer (plant) → Consumer (animal). Arrows show direction of energy transfer.

8. C [1]
Teaching note: Deforestation destroys habitats (negative). A, B, D are positive actions.

9. B [1]
Teaching note: Community = many populations of different species living together in a place.

10. B [1]
Teaching note: Moving to warmer places is an action → behavioural adaptation.

Section B (12 marks)

11. [2]
Accept any two of: temperature, light, water availability, availability of food, presence of other organisms.
(1 mark each, max 2)
Teaching note: These are physical or biological factors from syllabus that affect survival.

12. [2]
Role: Break down dead organisms and waste, returning nutrients to the environment. [1]
Example: fungus / bacteria / mushroom. [1]
Teaching note: Decomposers are not producers or consumers; they recycle matter.

13. [2]
Fish live in water, so gills are a structural adaptation that allow them to take in oxygen dissolved in water. [1] Lungs would not work underwater. [1]
Teaching note: Link structure (gills) to function (breathing in water) via adaptation.

14. [2]
Any two: conservation, reforestation, building nature reserves, cleaning rivers, reducing pollution. (1 mark each)
Teaching note: Positive impacts help the environment.

15. [2]
P: Producer [1] Q: Consumer [1] R: Decomposer (or higher consumer if web; for chain: decomposer or top consumer acceptable with reason)
Expected visual: three boxes left→right P→Q→R. Standard PSLE chain: P=Producer (e.g., plant), Q=Primary consumer (e.g., grasshopper), R=Secondary consumer or decomposer. For strict chain we accept P=Producer, Q=Consumer, R=Decomposer.
Teaching note: Energy flows left to right; producers first.

16. [2]
Structural: sharp claws / strong legs / camouflage fur. [1]
Behavioural: hunting in groups / resting in shade. [1]
Teaching note: Structural = body part; behavioural = action.

Section C (8 marks)

17. [4 total: 1+1+2]
(a) Water lilies [1]
(b) Tadpoles / frogs / dragonfly larvae (any one) [1]
(c) Frog population would decrease [1] because frogs depend on water lilies for food or shelter / tadpoles lose habitat. [1]
Teaching note: Producers support consumers; removing them breaks the chain.

18. [3 total: 1+2]
(a) Grasshopper and Frog [1] (both eat Grass)
(b) Grasshopper population may increase [1] because Frog (a predator of Grasshopper) may have less food if Snake gone? Actually Snake eats Frog, so removing Snake → more Frogs → more Frogs eat Grasshoppers → Grasshopper population decreases. [1] Clear link: Snake removed → frog population rises → more grasshoppers eaten → grasshopper numbers fall.
Teaching note: Food web shows interconnections; removing one affects others.

19. [2]
No, she is not correct. [1] A population is one species; a forest has many populations which form a community. [1]
Teaching note: Use terms: organism, population, community.

20. [2 total: 1+1]
(a) Warmer water may hold less oxygen / fish may not survive the temperature change. [1]
(b) Cool the water before release / treat factory water / reduce warm discharge. [1]
Teaching note: Man's impact can be reduced by better practices.

End of Answer Key