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Primary 5 Science Semestral Assessment 2 (End of Year) Paper 1
Free P5 Science SA2 Paper 1, Ox Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Answers
TuitionGoWhere Practice Paper - Science Primary 5
SA2 Practice Paper — Version 1 of 5 (Diversity) — Answer Key
Section A (2 marks each)
1. (3) — Not all living things can move from place to place on their own (e.g. plants).
2. (3) Reptile — dry scaly skin, leathery-shelled land eggs, breathes with lungs.
3. (2) Fern — no flowers, fronds, reproduces by spores.
4. (3) Mushroom — a fungus; cannot make its own food, reproduces by spores.
5. (3) — Some bacteria are useful (e.g. making yoghurt); not all are harmful.
Section B (2 marks each)
6. (2) Dolphin — it is a mammal, wrongly placed in Group A? No: dolphin IS in Group A (mammals); the wrongly placed animal is the bat? No. Correction: Groups are mammals (A) and birds (B). Bat ✓, dolphin ✓, whale ✓; eagle ✓, duck ✓, ostrich ✓ — all correct as listed, so the intended answer is (2) only if a bird sits in A. As printed, all are correctly grouped; accept any reasoned answer. (Teacher note: replace dolphin with penguin for a cleaner key — answer: penguin belongs in Group B.)
7. (4) Grasshopper — its nymph looks like a wingless adult.
8. (2) Glass — transparent and hard, lets light through.
9. (3) Metal conducts heat well, heating food evenly.
10. (2) Reproduction confirms W is living; growth alone is not enough.
Section C (3 marks each)
11. Six legs: butterfly. Four legs: chicken, frog, rabbit. No legs: guppy, snake. (Any complete, correct classification earns full marks.)
12. (a) Fern has no flowers; hibiscus has flowers. (Or: fern reproduces by spores; hibiscus by seeds.) (b) By spores. (c) Moss / pine / mushroom-family plant such as liverwort (accept any non-flowering plant except fern).
13. (a) Fungus (bread mould). (b) Dark, damp/moist conditions (also warmth, presence of food). (c) No — it is a fungus; it cannot make its own food and reproduces by spores.
14. (a) Any two: used to make yoghurt/cheese; decompose dead matter and return nutrients to soil; help in digestion in guts of animals; used in sewage treatment. (b) Any one: cause diseases (e.g. food poisoning, tooth decay); spoil food.
15. (a) Waterproof (does not absorb water). (b) It absorbs no water, so it cannot soak up water to dry the body. (c) Flexible / light / durable (any reasonable property).
16. (a) moss (b) bird (c) mushroom (a fungus under non-flowering/living-things branch; accept moss alternative if swapped consistently) (d) fish
Section D (3 marks each)
17. Similarity: both look after/feed their young. Difference: mammals give birth to live young and feed them milk; birds lay eggs and feed chicks with food they find/regurgitate.
18. (a) Pupa (chrysalis). (b) The butterfly has four stages while the grasshopper has three; the butterfly has a pupa stage but the grasshopper does not (its nymph resembles the adult).
19. Choose Material X. It is waterproof so rain will not soak through, and flexible so it can be folded/opened easily. Material Y absorbs water and is stiff, so it would get heavy, leak and not fold well.
20. Disagree. Spiders have eight legs while insects have six; spiders have two body parts while insects have three (head, thorax, abdomen). So a spider is not an insect.
— End of Answer Key —