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Primary 3 Science Practice Paper 4
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Questions
TuitionGoWhere Practice Paper - Science Primary 3
TuitionGoWhere Practice Paper (AI)
Subject: Science
Level: Primary 3
Paper: Practice Paper 4 (Diversity Theme)
Duration: 1 hour 15 minutes
Total Marks: 50
Name: ________________________
Class: Primary 3 _______
Date: ________________________
INSTRUCTIONS TO CANDIDATES
- Do not turn over this page until you are told to do so.
- Follow all instructions carefully.
- Answer all questions.
- The number of marks is given in brackets [ ] at the end of each question or part question.
- The total marks for this paper is 50.
- Write your answers in the spaces provided.
SECTION A: Multiple-Choice Questions (20 marks)
For each question from 1 to 10, four options are given. Choose the correct answer and write its number (1, 2, 3 or 4) in the bracket provided.
1. Which of the following is a non-living thing? [1]
(1) Mushroom growing on a log
(2) Moss on a rock
(3) Water in a river
(4) Fern in the forest
( )
2. Study the classification table below.
| Group X | Group Y |
|---|---|
| Cat | Rose plant |
| Eagle | Mango tree |
| Whale | Moss |
Which of the following headings best represents Group X and Group Y? [1]
(1) Animals | Plants
(2) Mammals | Flowering plants
(3) Living things | Non-living things
(4) Vertebrates | Non-flowering plants
( )
3. A student observes a mystery organism. It is green, grows in damp places, and does not produce flowers or seeds. It reproduces by spores. Which group does it most likely belong to? [1]
(1) Bacteria
(2) Fungi
(3) Non-flowering plants
(4) Flowering plants
( )
4. Which of the following statements about bacteria is correct? [1]
(1) All bacteria are harmful to humans.
(2) Bacteria can be seen with the naked eye.
(3) Bacteria reproduce by dividing into two.
(4) Bacteria are a type of plant.
( )
5. Four pupils made the following statements about living things:
- Ali: All living things can move from place to place.
- Bala: All living things need air, water and food.
- Cindy: All living things reproduce by laying eggs.
- Devi: All living things have legs.
Who made the correct statement? [1]
(1) Ali
(2) Bala
(3) Cindy
(4) Devi
( )
6. The diagram below shows a young plant and an adult plant of the same species.
<image_placeholder> id: Q6-fig1 type: diagram linked_question: Q6 description: Two diagrams side by side showing a young bean plant (with two small leaves) and an adult bean plant (taller, with many leaves, flowers and bean pods). Both are labelled with height measurements: young plant 5 cm, adult plant 45 cm. labels: Young plant (5 cm), Adult plant (45 cm), leaves, stem, roots, flowers, bean pods values: Heights: 5 cm and 45 cm must_show: Clear size difference, presence of flowers and pods only on adult plant, root system on both </image_placeholder>
Which characteristic of living things is best shown by the diagrams? [1]
(1) Living things reproduce.
(2) Living things grow.
(3) Living things respond to changes.
(4) Living things need air, water and food.
( )
7. Which of the following organisms is classified as a mammal? [1]
(1) Penguin
(2) Bat
(3) Crocodile
(4) Salmon
( )
8. Study the flowchart below.
<image_placeholder> id: Q8-fig1 type: diagram linked_question: Q8 description: Flowchart for classifying animals. Start: Does it have feathers? Yes -> Bird. No -> Does it have hair/fur? Yes -> Mammal. No -> Does it have scales and live in water? Yes -> Fish. No -> Does it have moist skin and live on land and water? Yes -> Amphibian. No -> Does it have dry scales and lay eggs on land? Yes -> Reptile. No -> Insect (6 legs, 3 body parts). labels: Feathers, Hair/fur, Scales (water), Moist skin, Dry scales, 6 legs/3 body parts values: None must_show: Clear decision diamonds, yes/no branches, final classification boxes </image_placeholder>
An animal has dry scales, lays eggs on land, and breathes with lungs. Which group does it belong to? [1]
(1) Amphibian
(2) Reptile
(3) Fish
(4) Mammal
( )
9. A piece of bread was left in a sealed bag in a warm place. After a few days, black patches appeared on the bread. What are these black patches? [1]
(1) Bacteria
(2) Mould (a type of fungi)
(3) Yeast (a type of fungi)
(4) Seeds
( )
10. Which of the following shows the correct order of classification from the broadest group to the most specific? [1]
(1) Animal → Mammal → Dog → Poodle
(2) Poodle → Dog → Mammal → Animal
(3) Mammal → Animal → Dog → Poodle
(4) Dog → Poodle → Mammal → Animal
( )
SECTION B: Structured Questions (30 marks)
Answer all questions in the spaces provided.
11. The table below shows four things found in a school garden. Complete the table by putting a tick (✓) in the correct columns. [4]
| Thing | Living | Non-living | Reason (choose one: grows / reproduces / needs air, water, food / responds to changes / moves by itself) |
|---|---|---|---|
| Grasshopper | |||
| Metal bench | |||
| Hibiscus plant | |||
| Rainwater in a puddle |
12. (a) State two characteristics of living things. [2]
(b) A crystal grows bigger when placed in a saturated solution. Explain why the crystal is not considered a living thing even though it grows. [2]
13. The diagram below shows three organisms: a mushroom, a fern, and a bacterium (magnified).
<image_placeholder> id: Q13-fig1 type: diagram linked_question: Q13 description: Three labelled diagrams. Left: Mushroom with cap, gills, stalk. Middle: Fern with fronds, rhizome, roots, and sporangia on underside of leaves. Right: Rod-shaped bacterium with cell wall, cytoplasm, flagellum, magnified 1000x. labels: Mushroom: cap, gills, stalk; Fern: frond, rhizome, roots, sporangia; Bacterium: cell wall, cytoplasm, flagellum values: Magnification: bacterium ×1000 must_show: Distinct structures for each organism, sporangia visible on fern, gills on mushroom </image_placeholder>
(a) Which two of these organisms reproduce by spores? [1]
(b) State one difference between the fern and the mushroom in terms of how they obtain food. [2]
(c) Bacteria are very small. What instrument is needed to see them clearly? [1]
14. Classify the following animals into the correct groups in the table below. [4]
Animals: Penguin, Frog, Guppy, Cobra, Butterfly, Bat, Earthworm, Lizard
| Mammal | Bird | Fish | Amphibian | Reptile | Insect | Others |
|---|---|---|---|---|---|---|
15. Study the diagram of a plant below.
<image_placeholder> id: Q15-fig1 type: diagram linked_question: Q15 description: A flowering plant (hibiscus) with labelled parts: flower, leaf, stem, roots. An inset shows a cross-section of the stem with xylem and phloem labelled. labels: Flower, leaf, stem, roots, xylem, phloem values: None must_show: Clear plant structure, flower with petals/stamen/pistil, stem cross-section showing vascular bundles </image_placeholder>
(a) Name the part labelled X (the flower). [1]
(b) State the function of the part labelled Y (the roots). [1]
(c) The plant is a flowering plant. Name one other example of a flowering plant. [1]
(d) How does a non-flowering plant like a fern reproduce? [1]
16. Wei Ming wants to find out whether a Venus flytrap is a living thing. He places a small insect on one of its leaves and observes that the leaf snaps shut.
(a) Which characteristic of living things does this show? [1]
(b) Suggest one other observation Wei Ming could make to confirm the Venus flytrap is a living thing. [1]
17. The diagram below shows the life cycle of a butterfly.
<image_placeholder> id: Q17-fig1 type: diagram linked_question: Q17 description: Four-stage life cycle diagram: Egg → Larva (caterpillar) → Pupa (chrysalis) → Adult butterfly. Arrows show direction. Each stage labelled. labels: Egg, Larva (caterpillar), Pupa (chrysalis), Adult butterfly values: None must_show: Clear cyclic arrows, distinct morphological differences between stages </image_placeholder>
(a) Name the stage labelled P. [1]
(b) At which stage does the butterfly reproduce? [1]
(c) State one difference between the larva and the adult butterfly. [1]
18. (a) Fungi such as yeast are useful to humans. State one use of yeast. [1]
(b) Some bacteria are harmful. State one way harmful bacteria can enter our body. [1]
(c) State one way to prevent harmful bacteria from making us sick. [1]
19. The table below shows the properties of four materials. Complete the table. [4]
| Material | Property: Waterproof (Yes/No) | Property: Flexible (Yes/No) | Property: Transparent (Yes/No) | Suitable for making... (choose: raincoat / window pane / rubber band / towel) |
|---|---|---|---|---|
| Plastic sheet | ||||
| Glass | ||||
| Rubber | ||||
| Cotton cloth |
20. Look at the classification chart below.
<image_placeholder> id: Q20-fig1 type: diagram linked_question: Q20 description: Classification chart with three main branches: Living Things → Plants (Flowering, Non-flowering), Animals (Mammals, Birds, Fish, Amphibians, Reptiles, Insects), Fungi (Mould, Yeast, Mushroom), Bacteria. Non-living Things → Man-made (Plastic, Metal, Glass), Natural (Water, Air, Rocks, Sand). labels: All group names as listed values: None must_show: Clear hierarchy, all major groups represented, examples under each </image_placeholder>
(a) Based on the chart, which group does yeast belong to? [1]
(b) State one similarity between yeast and mushrooms. [1]
(c) State one difference between bacteria and fungi. [1]
(d) Give one example of a non-living thing that is natural. [1]
END OF PAPER
Total Marks: 50
Please check your work carefully.
Answers
TuitionGoWhere Practice Paper - Science Primary 3 (Answer Key)
Subject: Science
Level: Primary 3
Paper: Practice Paper 4 (Diversity Theme)
Total Marks: 50
SECTION A: Multiple-Choice Questions (20 marks)
1. Answer: (3)
Explanation: Water in a river is a non-living thing. It does not grow, reproduce, need food, or respond to changes. Mushrooms (fungi), moss (non-flowering plants), and ferns (non-flowering plants) are all living things.
Mark: 1
2. Answer: (1)
Explanation: Group X contains cat, eagle, whale — all animals. Group Y contains rose plant, mango tree, moss — all plants. Option (2) is incorrect because whale is not a mammal that fits "mammals" exclusively (eagle is a bird), and moss is non-flowering. Option (3) is wrong because both groups are living. Option (4) is wrong because Group Y includes flowering plants.
Mark: 1
3. Answer: (3)
Explanation: The organism is green (contains chlorophyll), grows in damp places, does not produce flowers or seeds, and reproduces by spores. These are characteristics of non-flowering plants (e.g., ferns, mosses). Fungi (option 2) are not green and do not make their own food. Bacteria (option 1) are microscopic. Flowering plants (option 4) produce flowers and seeds.
Mark: 1
4. Answer: (3)
Explanation: Bacteria reproduce asexually by binary fission (dividing into two). Option (1) is false — many bacteria are beneficial (e.g., in digestion, decomposition). Option (2) is false — bacteria are microscopic. Option (4) is false — bacteria are prokaryotes, not plants.
Mark: 1
5. Answer: (2)
Explanation: Bala is correct. All living things need air, water, and food to survive. Ali is wrong — plants are living but cannot move from place to place. Cindy is wrong — only some animals lay eggs; mammals give birth to live young, plants produce seeds. Devi is wrong — many living things (plants, worms, bacteria) do not have legs.
Mark: 1
6. Answer: (2)
Explanation: The diagrams show a young plant (5 cm) and an adult plant (45 cm) with flowers and bean pods. The increase in size and development of reproductive structures demonstrates growth, a characteristic of living things.
Mark: 1
7. Answer: (2)
Explanation: Bats are mammals — they have hair/fur, give birth to live young, and feed their young with milk. Penguins are birds (feathers, lay eggs). Crocodiles are reptiles (dry scales, lay eggs on land). Salmon are fish (scales, gills, live in water).
Mark: 1
8. Answer: (2)
Explanation: Following the flowchart: No feathers → No hair/fur → No scales and live in water → No moist skin and live on land and water → Yes, dry scales and lay eggs on land → Reptile.
Mark: 1
9. Answer: (2)
Explanation: The black patches on bread are mould, a type of fungi. Mould grows as fuzzy colonies visible to the naked eye. Yeast (option 3) is microscopic and not seen as patches. Bacteria (option 1) are too small to see as patches. Seeds (option 4) do not appear spontaneously on bread.
Mark: 1
10. Answer: (1)
Explanation: Classification goes from broadest to most specific: Animal (kingdom) → Mammal (class) → Dog (species) → Poodle (breed/variety). The other options reverse the order or start at a specific level.
Mark: 1
SECTION B: Structured Questions (30 marks)
11. [4 marks — 1 mark per correct row]
| Thing | Living | Non-living | Reason |
|---|---|---|---|
| Grasshopper | ✓ | Moves by itself / Responds to changes / Reproduces / Needs air, water, food | |
| Metal bench | ✓ | (Does not grow, reproduce, need air/water/food, respond, or move by itself) | |
| Hibiscus plant | ✓ | Grows / Reproduces / Needs air, water, food / Responds to changes | |
| Rainwater in a puddle | ✓ | (Does not grow, reproduce, need air/water/food, respond, or move by itself) |
Marking notes:
- 1 mark for each correctly completed row (Living/Non-living tick + valid reason).
- Accept any valid characteristic of living things for living examples.
- For non-living, reason column may be left blank or state "does not show characteristics of living things".
12.
(a) [2 marks — 1 mark each]
Any two of:
- Living things grow.
- Living things reproduce.
- Living things respond to changes.
- Living things need air, water, and food.
- Living things move by themselves.
- Living things excrete waste.
(b) [2 marks]
The crystal grows by adding particles from the solution onto its surface (external accumulation), not by cell division like living things. It does not carry out life processes such as respiration, reproduction, or responding to stimuli. It does not need food, air, or water for survival.
Marking notes:
- 1 mark for explaining crystal growth is external/physical, not cellular.
- 1 mark for stating it lacks other characteristics of living things (no respiration, reproduction, response, etc.).
13.
(a) [1 mark]
Mushroom and fern (both reproduce by spores).
(b) [2 marks]
The fern is a plant and makes its own food through photosynthesis (using sunlight, water, and carbon dioxide). The mushroom is a fungus and cannot make its own food — it obtains food by decomposing dead organic matter (external digestion and absorption).
Marking notes:
- 1 mark for identifying fern as photosynthetic/food-maker.
- 1 mark for identifying mushroom as decomposer/absorbs nutrients from dead matter.
(c) [1 mark]
Microscope (or light microscope / compound microscope).
14. [4 marks — 0.5 mark per correct placement, total 8 animals]
| Mammal | Bird | Fish | Amphibian | Reptile | Insect | Others |
|---|---|---|---|---|---|---|
| Bat | Penguin | Guppy | Frog | Cobra | Butterfly | Earthworm |
Marking notes:
- Bat: mammal (hair, live birth, milk).
- Penguin: bird (feathers, lays eggs, beak).
- Guppy: fish (scales, gills, fins, lives in water).
- Frog: amphibian (moist skin, lives on land and water, lays eggs in water).
- Cobra: reptile (dry scales, lays eggs on land, lungs).
- Butterfly: insect (6 legs, 3 body parts, wings).
- Earthworm: Others (annelid — segmented body, no legs, not an insect).
- Deduct 0.5 for each misplaced animal.
15.
(a) [1 mark]
Flower
(b) [1 mark]
Absorb water and mineral salts from the soil / Anchor the plant firmly to the ground. (Accept either.)
(c) [1 mark]
Any flowering plant, e.g., Mango tree, Rose plant, Hibiscus, Bougainvillea, Orchid, Sunflower, Bean plant.
(d) [1 mark]
By spores (produced in sporangia on the underside of fronds).
16.
(a) [1 mark]
Living things respond to changes (or "respond to stimuli").
(b) [1 mark]
Any one valid observation showing another characteristic, e.g.:
- It grows taller / produces new leaves over time. (Growth)
- It produces flowers and seeds. (Reproduction)
- Its roots absorb water from the soil. (Needs water)
- It traps and digests insects for nutrients. (Needs food)
17.
(a) [1 mark]
Pupa (or chrysalis).
(b) [1 mark]
Adult butterfly stage.
(c) [1 mark]
Any one difference, e.g.:
- Larva (caterpillar) has a long, segmented body with many legs; adult has 6 legs and 3 body parts.
- Larva eats leaves; adult feeds on nectar.
- Larva cannot fly; adult has wings and can fly.
- Larva does not reproduce; adult reproduces.
18.
(a) [1 mark]
Yeast is used in making bread (causes dough to rise) / brewing beer / making wine / fermentation.
(b) [1 mark]
Any one way, e.g.:
- Through cuts or wounds in the skin.
- By eating contaminated food or drinking contaminated water.
- By breathing in droplets from an infected person (cough/sneeze).
- Through unclean hands touching mouth/nose/eyes.
(c) [1 mark]
Any one way, e.g.:
- Wash hands with soap and water before eating and after using the toilet.
- Cook food thoroughly to kill bacteria.
- Cover mouth/nose when coughing/sneezing.
- Keep wounds clean and covered.
- Drink boiled/treated water.
19. [4 marks — 1 mark per fully correct row]
| Material | Waterproof | Flexible | Transparent | Suitable for making... |
|---|---|---|---|---|
| Plastic sheet | Yes | Yes | Yes/No* | Raincoat |
| Glass | Yes | No | Yes | Window pane |
| Rubber | Yes | Yes | No | Rubber band |
| Cotton cloth | No | Yes | No | Towel |
*Plastic sheet can be transparent or opaque; accept either if consistent with use. For raincoat, waterproof and flexible are key.
Marking notes:
- 1 mark per row: all three properties correct + correct match to use.
- Raincoat: needs waterproof + flexible.
- Window pane: needs transparent + waterproof (rigid).
- Rubber band: needs flexible + waterproof.
- Towel: needs absorbent (not waterproof) + flexible.
20.
(a) [1 mark]
Fungi
(b) [1 mark]
Both are fungi / Both reproduce by spores / Both obtain food by decomposing dead organic matter / Both cannot make their own food. (Accept any one.)
(c) [1 mark]
Any one difference, e.g.:
- Bacteria are single-celled (unicellular); fungi can be unicellular (yeast) or multicellular (mould, mushroom).
- Bacteria are prokaryotes (no nucleus); fungi are eukaryotes (have nucleus).
- Bacteria reproduce by binary fission; fungi reproduce by spores.
- Some bacteria can photosynthesise (cyanobacteria); fungi cannot.
(d) [1 mark]
Any natural non-living thing: Water, Air, Rocks, Sand, Soil, Sunlight, Minerals.
END OF ANSWER KEY
Total Marks: 50