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Primary 4 Science Diversity Quiz
Free P4 Science Diversity quiz, Ox AI version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Answers
Primary 4 Science Quiz - Diversity: Answer Key
Total Marks: 40
Answer 1.
(2) Mammals — dolphins breathe with lungs, are warm-blooded and feed their young with milk.
Answer 2.
(3) Wooden stool — wood comes from trees, which are living things.
Answer 3.
(3) They respond to changes around them.
Answer 4.
(3) Crocodile
Answer 5.
(2) Glass — it is transparent, allowing light to pass through so she can see clearly.
Answer 6.
(4) Fern
Answer 7.
(1) Snake
Answer 8.
(2) Cotton T-shirt — cotton comes from the cotton plant.
Answer 9.
(2) It cannot produce young. Reproduction is a life process that all living things show, but a flame cannot reproduce.
Answer 10.
(3) Birds
Answer 11.
Any two, e.g.:
- Living things need food, water and air; non-living things do not.
- Living things grow and respond to changes; non-living things do not.
- Living things can reproduce; non-living things cannot.
Answer 12.
(a) Group A: Mammals. Group B: Birds. (b) The dolphin breathes with lungs, gives birth to live young and feeds its young with milk, so it is a mammal even though it lives in water.
Answer 13.
Rubber property: Rubber is flexible/elastic and strong, so it grips the road and does not break easily. Why glass is not suitable: Glass is brittle and shatters easily on impact, so it would crack under the weight and bumps of a car.
Answer 14.
| Type of plant | Plants |
|---|---|
| Flowering plants | orchid, ixora |
| Non-flowering plants | fern, moss |
Answer 15.
Choice: Plastic sheet. Property and explanation: Plastic is waterproof — it does not allow rain to pass through, so Siti stays dry. Cotton absorbs water, so the wearer would get wet.
Answer 16.
(a) Guppy. (b) Penguin. (c) All four are animals (living things that can move about on their own). (d) A key uses clear, step-by-step features to identify and name unknown organisms accurately, helping scientists sort and classify the great variety of living things.
Answer 17.
Conclusion: X is a plant. Evidence 1: X makes its own food, which plants do but animals cannot. Evidence 2: X grew taller over three weeks, showing growth, a characteristic of living plants. (Its green colour also shows it contains chlorophyll for making food.)
Answer 18.
Choice: Bag A. Reason 1: Thick, woven canvas is strong, so it can carry heavy items such as bottles and shells without tearing. Reason 2: Canvas is tough and durable, and it stays usable even when it gets wet. Why another bag is not suitable: Bag C (paper) tears easily and becomes weak and soggy when wet, so it cannot hold heavy, wet items.
Answer 19.
(a) Difference 1: Animal P has scales and fins; Animal Q has fur and legs. Difference 2: Animal P lives in water; Animal Q lives on land. (b) Animal P is a fish. (c) Animal Q is a mammal. (d) Animal Q has a body covered with fur/hair and feeds its young with milk (gives birth to live young), which are features of mammals.
Answer 20.
(a) Y is a living thing because it grew larger and spread over more of the bread each day, showing growth. (b) Y is not a plant because it does not make its own food, while plants make their own food. (c) Fungi (Y is bread mould). (d) Mushroom (or toadstool).