Primary 6 PSLE Science Semestral Assessment 2 (End of Year) Paper 5

TuitionGoWhere Exam Practice (AI) — Science Primary 6 PSLE

SA2 Practice Paper — Version 5 of 5

School: TuitionGoWhere Exam Practice (AI)
Subject: Science
Level: Primary 6 (PSLE)
Paper: SA2 Practice Paper (Version 5)
Duration: 60 minutes
Total Marks: 60
Name: ______________________
Class: ______
Date: ____________

Instructions:

• This paper contains 20 questions on the topic of Diversity.
• Section A: 10 multiple-choice questions (1 mark each).
• Section B: 6 short-answer questions (2–3 marks each).
• Section C: 4 structured questions (3–5 marks each).
• Write your answers clearly in the spaces provided.
• Marks allocated are shown at the end of each question.

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Section A (10 marks)

Answer all questions. Each question carries 1 mark.

1. Which of the following is a correct example of diversity among living things?
A. A cat that changes colour
B. Different breeds of dogs with different fur lengths
C. A plant growing taller
D. A fish swimming faster

2. Which group of organisms can make their own food?
A. Consumers
B. Decomposers
C. Producers
D. Predators

3. A habitat is best described as:
A. A type of animal
B. The place where an organism lives
C. A kind of food chain
D. A group of populations

4. Which of these is NOT a reason why organisms are diverse?
A. Different habitats
B. Different food sources
C. All organisms having the same DNA
D. Different adaptations

5. Mangrove swamps are home to many different organisms. This shows:
A. Low diversity
B. High diversity
C. No diversity
D. Only plant diversity

6. Which term means a group of the same kind of organisms living together?
A. Community
B. Population
C. Habitat
D. Ecosystem

7. A cactus stores water in its stem. This is an example of:
A. Behavioural adaptation
B. Structural adaptation
C. Habitat loss
D. Decomposer role

8. Which of the following increases diversity in a garden?
A. Planting only one type of flower
B. Removing all insects
C. Planting different flowers, shrubs, and trees
D. Paving the whole garden

9. Birds migrating to warmer places in winter is an example of:
A. Structural adaptation
B. Behavioural adaptation
C. Producers
D. Population

10. Decomposers help the environment by:
A. Eating producers
B. Breaking down dead organisms
C. Hunting prey
D. Making food from sunlight

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Section B (14 marks)

Answer all questions. Marks shown at end.

11. List two ways in which animals in a pond may be diverse. (2 marks)

12. Explain why a forest usually has higher diversity than a bare field. (2 marks)

13. A student saw a lizard with a long tail and a frog with smooth skin in the same habitat. Are they part of the same population? Explain. (2 marks)

14. Give one structural adaptation and one behavioural adaptation of a desert animal. (2 marks)

15. Why is it important to have many different producers in a habitat? (3 marks)

16. Man cuts down a mangrove forest to build a port. State two negative impacts on diversity. (3 marks)

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Section C (36 marks)

Answer all questions. Marks shown at end.

17. The diagram below shows a small garden with different organisms.

Generated diagram for Q17.

(a) Name one producer and one decomposer shown. (2 marks)
(b) Explain how diversity is shown in this garden. (3 marks)

18. A class recorded the number of different organisms in a pond and a roadside drain.

Habitat	Number of species
Pond	15
Drain	4

(a) Which habitat has higher diversity? (1 mark)
(b) Give two reasons why the pond has more diversity. (2 marks)
(c) Suggest one way to increase diversity in the drain. (2 marks)

19. Read the passage.

Octopuses can change colour to hide from predators. Penguins have thick fat to keep warm in cold seas. Both live in the ocean but are very different.

(a) What type of adaptation does the octopus show? (1 mark)
(b) Explain how the penguin's adaptation helps it survive. (2 marks)
(c) Why do you think the ocean can support such diverse animals? (2 marks)

20. A farmer uses only one type of rice plant in his field every year.

(a) State one problem this may cause for diversity. (1 mark)
(b) Explain how planting different crops at different times can help. (2 marks)
(c) Design a simple plan to make the field more diverse. (2 marks)

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End of Paper