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Primary 3 Science Diversity Quiz
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Primary 3 Science Quiz - Diversity: Answer Key
Version: 1 of 5 Total Marks: 50
Teaching notes are written for students new to the topic.
Answer 1.
(b) a bird's nest fern [2]
Teaching notes: Living things need water, food and air, and they can grow, respond to changes and reproduce. A fern is a plant, so it carries out all these life processes. A stool, window and ball are made by people from materials; they never grow, feed or reproduce on their own.
Common mistake: Thinking anything that can move is living.
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# Primary 3 Science Quiz - Diversity: Answer Key
**Version:** 1 of 5 **Total Marks:** 50
*Teaching notes are written for students new to the topic.*
## Answer 1.
**(b) a bird's nest fern** [2]
Teaching notes: Living things need water, food and air, and they can grow, respond to changes and reproduce. A fern is a plant, so it carries out all these life processes. A stool, window and ball are made by people from materials; they never grow, feed or reproduce on their own.
Common mistake: Thinking anything that can move is living.
## Answer 2.
**(c) bird** [2]
Teaching notes: Feathers, two wings and a beak are features of birds. Fish have wet scales and fins; insects have six legs; mammals have hair or fur.
## Answer 3.
**(b) does not let water pass through** [2]
Teaching notes: A bag carrying wet items must be waterproof so water does not leak out. Plastic and rubber are waterproof materials.
## Answer 4.
**(a) mushroom** [2]
Teaching notes: Mushrooms are fungi. They are not plants because they do not make their own food. Hibiscus is a plant; a grasshopper is an animal.
## Answer 5.
**(b) It grows bigger and drinks milk every day.** [2]
Teaching notes: Growing and taking in food show life processes. Having legs, fur or a kennel does not prove something is living.
## Answer 6.
Any ONE of: **water**, **food**, **air**. [1]
## Answer 7.
The snail can move by itself (and respond to changes around it), while the empty shell cannot move or respond on its own. [2]
Award 1 mark for each correct comparison point.
## Answer 8.
| Plant | Flowering plant | Non-flowering plant |
|---|---|---|
| Orchid | ✓ | |
| Fern | | ✓ |
| Banana plant | ✓ | |
| Moss | | ✓ |
[2] — 1 mark for every two correct ticks.
## Answer 9.
Goldfish: **fish**. Rabbit: **mammal**. [2]
## Answer 10.
Aiman is **not correct**. Bacteria are living things even though they are too small to see without a microscope. They grow, reproduce and need food and air, so they carry out life processes. [2]
## Answer 11.
Property 1: Metal **conducts heat well**, so the pot heats food quickly.
Property 2: Metal is **strong and hard**; it does not break easily when heated or knocked. [2]
(Also accept: metal is waterproof.)
## Answer 12.
Property: **flexible** (it can bend without breaking).
Example of material: **rubber** (also accept plastic). [2]
## Answer 13.
Living things: bread mould, yeast, potted fern.
Non-living things: wooden ruler, glass marble, toy robot. [2]
(1 mark for each fully correct group.)
## Answer 14.
Window pane: **B** (glass). Bath towel: **C** (cotton fabric). Car tyre: **A** (rubber). [2]
## Answer 15.
(a) The **table tennis ball** and the **wooden block** float. [1]
(b) He could use **wood** (or plastic). Wood floated in the tank, so a boat made of wood will stay on the surface of the water instead of sinking. [2]
## Answer 16.
I **do not agree** with Jia Wen.
Reason 1: The toy dog does not **grow**, and it does not need food, water or air.
Reason 2: The toy dog cannot **reproduce** (produce young); it only moves and barks when a button is pressed, not on its own. [3]
(1 mark for the decision plus 2 marks for the reasons.)
## Answer 17.
| Animal | One feature observed | Animal group |
|---|---|---|
| A | has feathers, two wings and a beak | bird |
| B | has dry scaly skin | reptile |
| C | has smooth, moist skin; lives in water and on land | amphibian |
| D | has six legs, two antennae and wings | insect |
[4] — 1 mark per row; the feature and group must match.
## Answer 18.
(a) **Material P** (the plastic sheet) is waterproof. [1]
(b) To make it a **fair test**: identical cups and the same amount of water mean that only the material is different, so any difference in the results is caused by the material being tested. [2]
(c) She should use **Material P** because it is waterproof and keeps water out. [1]
## Answer 19.
Plants: rose plant. Animals: dolphin. Fungi: mushroom. Bacteria: bacteria found in yoghurt. [4] — 1 mark each.
## Answer 20.
(a) **Wood** should NOT be used. It blocks light, so sunlight cannot reach the seedlings, and it absorbs water, so rain would soak through. [1]
(b) The **clear plastic sheet** is the BEST choice. [1]
(c) Property 1: It lets most light pass through, so the seedlings receive sunlight.
Property 2: It keeps rain out and is strong — it bends without breaking. [2]
(d) Handle the panel carefully and keep it away from fire or heat; smooth any sharp edges before use. (Accept any sensible precaution.) [1]