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Primary 3 Science Semestral Assessment 2 (End of Year) Paper 3

Free P3 Science SA2 Paper 3, GLM5.3 Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 3 Science From Real Exams Generated by GLM 5.3 Flash Updated 2026-08-27
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Answers

TuitionGoWhere Practice Paper - Science Primary 3

SA2 Practice Paper - Diversity (Version 3) - Answer Key

Total Marks: 50

Section A: Multiple Choice (10 marks)

Q1 (2) Bird — feathers, two wings, a beak, hatches from eggs.

Q2 (3) It does not need food, water and air to stay alive.

Q3 (3) Plastic sheet — does not absorb water and bends easily.

Q4 (3) Mould is a fungus, and it is a living thing.

Q5 Row (1): Animal P = Fish; Animal Q = Reptile.

Section B: Short Answer (10 marks)

Q6 (a) rabbit — living ✓; (b) wooden chair — non-living ✓; (c) mushroom — living ✓; (d) toy robot — non-living ✓; (e) raindrop — non-living ✓.

Q7 1. Grows → B; 2. Reproduces → A; 3. Responds to changes → D; 4. Needs food, water and air → C.

Q8 (a) Food, water and air. (b) Any one: they grow; they reproduce; they respond to changes around them; they move by themselves.

Q9 Rubber band: bend easily — Yes; absorb water — No. Glass mirror: bend easily — No; absorb water — No. Cotton towel: bend easily — Yes; absorb water — Yes.

Q10 Natural materials: cotton, wool. Man-made materials: plastic, glass.

Section C: Application (15 marks)

Q11 (a) Animal W: mammal. (b) Animal X: amphibian. (c) Animal Y: fish.

Q12 Flowering plants: hibiscus, orchid. Non-flowering plants: fern. Not a plant: mould.

Q13 Fabric Q. It does not absorb water, so the wearer stays dry in the rain, and it bends easily, so the raincoat is comfortable and easy to move in.

Q14 No, I do not agree. The robot is non-living because it cannot grow and cannot reproduce, and it does not need food, water and air to stay alive. It only moves and responds when a person presses its buttons, not on its own. (Any two valid reasons.)

Q15 Box P: Flowering plants. Box Q: Fungi. Box R: Animals.

Section D: Open-Ended (15 marks)

Q16 (a) False — some bacteria are useful/harmless. (b) False — a mushroom is a fungus. (c) True.

Q17 (a) Material B — it held the most marbles (20) before snapping. (b) No, I do not agree. Material A held only 5 marbles while Material C held 12 marbles, so Material C is stronger than Material A. (c) Any one: strips were of the same size and thickness; the same container was used; identical marbles were added one at a time.

Q18 (a) Mushroom — it is a fungus, not a plant. (b) Ferns reproduce by spores.

Q19 Glass. It is transparent, so Kumar can see the fish clearly, and it does not absorb water (waterproof) and is stiff, so it does not bend easily. Rubber is not see-through and bends easily.

Q20 The snail shows that living things respond to changes around them. When the weather became hot, the snail hid inside its shell under a damp leaf to stop itself from drying out, and came out to crawl when it was cooler.

End of Answer Key