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Primary 4 Science Practice Paper 2
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Questions
TuitionGoWhere Practice Paper - Science Primary 4
TuitionGoWhere Practice Paper (AI)
Subject: Science
Level: Primary 4
Paper: Practice Paper 2 (Version 2 of 5)
Duration: 1 hour 30 minutes
Total Marks: 60
Name: ________________________
Class: Primary 4 _______
Date: ________________________
INSTRUCTIONS TO CANDIDATES
- Do not turn over this page until you are told to do so.
- Follow all instructions carefully.
- Answer all questions.
- For Section A, shade your answers on the Optical Answer Sheet (OAS) provided.
- For Section B and Section C, write your answers in the spaces provided in this booklet.
- The number of marks is given in brackets [ ] at the end of each question or part question.
- The total marks for this paper is 60.
SECTION A: Multiple-Choice Questions (28 marks)
Questions 1 to 14 carry 2 marks each. For each question, four options are given. Choose the correct answer and shade the corresponding oval (1, 2, 3, or 4) on the Optical Answer Sheet.
1. Which of the following groups contains only living things? [2]
(1) Mushroom, moss, rock
(2) Bacteria, yeast, mould
(3) Cloud, rain, wind
(4) Robot, computer, car
2. Study the classification chart below.
Generated diagram for Q2.
Which of the following correctly represents X and Y?
| X | Y | |
|---|---|---|
| (1) | Flowering Plants | Vertebrates |
| (2) | Non-Flowering Plants | Invertebrates |
| (3) | Vertebrates | Flowering Plants |
| (4) | Invertebrates | Non-Flowering Plants |
3. A student observed four organisms: a fern, a mushroom, a rose plant, and a bacterium. How many of these organisms reproduce by spores? [2]
(1) 1
(2) 2
(3) 3
(4) 4
4. Which of the following statements about bacteria is correct? [2]
(1) All bacteria are harmful to humans.
(2) Bacteria can only be seen with a microscope.
(3) Bacteria are plants because they have cell walls.
(4) Bacteria reproduce by laying eggs.
5. The diagram below shows a plant.
Generated diagram for Q5.
Which part of the plant (A, B, C, D, or E) makes food for the plant? [2]
(1) A
(2) B
(3) C
(4) D
6. Which of the following are characteristics of fungi? [2]
A. They reproduce by spores.
B. They make their own food.
C. They feed on dead or decaying matter.
D. They have chlorophyll.
(1) A and B only
(2) A and C only
(3) B and D only
(4) C and D only
7. Study the flowchart below.
Generated diagram for Q7.
An organism does not make its own food, reproduces by spores, and does not move freely. What is it? [2]
(1) Plant
(2) Fungus
(3) Animal
(4) Bacterium
8. Which of the following groups of animals are all vertebrates? [2]
(1) Earthworm, snail, spider
(2) Frog, lizard, eagle
(3) Jellyfish, starfish, crab
(4) Butterfly, beetle, grasshopper
9. The diagram below shows the life cycle of a butterfly.
Generated diagram for Q9.
Which stage comes after the larva stage? [2]
(1) Egg
(2) Pupa
(3) Adult
(4) Caterpillar
10. A student wants to find out if mould grows faster on white bread or wholemeal bread. Which of the following variables should be kept the same for a fair test? [2]
A. Type of bread
B. Amount of water added
C. Temperature of surroundings
D. Time taken for mould to appear
(1) A and B only
(2) B and C only
(3) A and D only
(4) C and D only
11. Which of the following is a non-flowering plant? [2]
(1) Hibiscus
(2) Orchid
(3) Fern
(4) Mango tree
12. The table below shows the characteristics of four organisms.
| Organism | Makes own food | Reproduces by spores | Has backbone |
|---|---|---|---|
| W | Yes | No | No |
| X | No | Yes | No |
| Y | No | No | Yes |
| Z | No | No | No |
Which organism is most likely a mammal? [2]
(1) W
(2) X
(3) Y
(4) Z
13. Why are bacteria classified as micro-organisms? [2]
(1) They are all harmful.
(2) They can only be seen under a microscope.
(3) They reproduce very slowly.
(4) They do not need food to survive.
14. Which of the following shows the correct order of stages in the life cycle of a mosquito? [2]
(1) Egg → Larva → Pupa → Adult
(2) Egg → Nymph → Adult
(3) Egg → Pupa → Larva → Adult
(4) Egg → Adult → Larva → Pupa
SECTION B: Structured Questions (22 marks)
Questions 15 to 22 carry 2 to 4 marks each. Write your answers in the spaces provided.
15. The diagram below shows a mushroom growing on a rotting log.
Generated diagram for Q15.
(a) State the function of the gills of the mushroom. [1]
(b) Explain why the mushroom is growing on the rotting log. [1]
(c) Is a mushroom a plant? Give a reason for your answer. [1]
16. Classify the following organisms into the correct groups in the table below. [3]
Organisms: Eagle, Moss, Mould, Shark, Yeast, Fern
| Plants | Animals | Fungi | Bacteria |
|---|---|---|---|
17. Study the classification table below.
Generated table for Q17.
(a) Animal X has feathers and lays eggs. Which group does it belong to? [1]
(b) Animal Y breathes through gills when young and lungs when adult. It has moist skin. Which group does it belong to? [1]
(c) State one difference between the reproduction method of mammals and reptiles. [1]
18. The diagram below shows the life cycle of a frog.
Generated diagram for Q18.
(a) Name the stage labelled P in the diagram. [1]
(b) State two differences between the tadpole and the adult frog. [2]
19. A student placed a slice of bread in a sealed plastic bag and left it in a warm, dark cupboard. After 5 days, greenish-black patches appeared on the bread.
(a) What are the greenish-black patches? [1]
(b) Explain why the patches appeared on the bread. [1]
(c) Suggest one way to slow down the growth of these patches on bread. [1]
20. The flowchart below shows how some living things are classified.
Generated diagram for Q20.
(a) Name Group A. [1]
(b) An organism is placed in Group B. State two characteristics of this organism. [2]
(c) An organism is placed in Group D. Give one example of such an organism. [1]
21. The table below shows the characteristics of four plants.
| Plant | Bears flowers | Bears fruits | Reproduces by spores |
|---|---|---|---|
| P | Yes | Yes | No |
| Q | No | No | Yes |
| R | Yes | Yes | No |
| S | No | No | Yes |
(a) Which plants are flowering plants? [1]
(b) Which plants are non-flowering plants? [1]
(c) State the function of the fruit in a flowering plant. [1]
22. Study the diagram below.
Generated diagram for Q22.
(a) Which cell (Plant or Animal) has chloroplasts? [1]
(b) State the function of chloroplasts. [1]
(c) Name one structure present in the plant cell but not in the animal cell, other than chloroplasts. [1]
SECTION C: Open-Ended Questions (10 marks)
Questions 23 to 25 carry 3 to 4 marks each. Write your answers in the spaces provided.
23. A student conducted an experiment to find out the conditions needed for mould to grow on bread. She set up four set-ups as shown below.
Generated experimental_setup for Q23.
(a) Which two set-ups should the student compare to find out if light is needed for mould growth? [1]
(b) Based on the results, mould grew in Set-ups A, B, and D but not in Set-up C. What conclusion can be drawn about the condition needed for mould growth? [1]
(c) Explain why mould did not grow in Set-up D even though water was present. [2]
24. The diagram below shows a young plant and an adult plant of the same species.
Generated diagram for Q24.
(a) State two differences between the young plant and the adult plant. [2]
(b) The young plant was grown from a seed. Describe two conditions needed for the seed to germinate. [2]
25. Ali found an unknown organism in his garden. He observed the following characteristics:
- It does not make its own food.
- It reproduces by spores.
- It feeds on dead leaves and decaying wood.
- It cannot move from place to place.
(a) Which group of living things does this organism belong to? [1]
(b) Explain how you arrived at your answer in (a) using the characteristics observed. [2]
(c) State one way this organism is useful to the environment. [1]
END OF PAPER
Total Marks: 60
Answers
TuitionGoWhere Practice Paper - Science Primary 4 (Answer Key)
Subject: Science
Level: Primary 4
Paper: Practice Paper 2 (Version 2 of 5)
Total Marks: 60
SECTION A: Multiple-Choice Questions (28 marks)
1. Answer: (2) Bacteria, yeast, mould [2]
Explanation:
- Bacteria, yeast, and mould are all micro-organisms (living things).
- Mushroom and moss are living, but rock is non-living.
- Cloud, rain, wind are non-living natural phenomena.
- Robot, computer, car are man-made non-living things.
2. Answer: (1) X: Flowering Plants, Y: Vertebrates [2]
Explanation:
The classification chart shows:
- Living Things → Plants → Flowering and Non-Flowering
- Living Things → Animals → Vertebrates and Invertebrates
X is the sub-group under Plants, so X = Flowering Plants.
Y is the sub-group under Animals, so Y = Vertebrates.
3. Answer: (2) 2 [2]
Explanation:
- Fern: Reproduces by spores ✓
- Mushroom (fungus): Reproduces by spores ✓
- Rose plant (flowering plant): Reproduces by seeds ✗
- Bacterium: Reproduces by binary fission ✗
Total = 2 organisms (fern and mushroom).
4. Answer: (2) Bacteria can only be seen with a microscope. [2]
Explanation:
- (1) False: Many bacteria are beneficial (e.g., in digestion, decomposition, food production).
- (2) True: Bacteria are microscopic single-celled organisms.
- (3) False: Bacteria are not plants; they lack chlorophyll and have different cell wall composition.
- (4) False: Bacteria reproduce asexually by binary fission, not by laying eggs.
5. Answer: (3) C [2]
Explanation:
The leaf (part C) contains chlorophyll and carries out photosynthesis to make food for the plant.
- Roots absorb water and minerals.
- Stem transports water and food.
- Flowers are reproductive structures.
- Fruits protect and disperse seeds.
6. Answer: (2) A and C only [2]
Explanation:
Characteristics of fungi:
- A. They reproduce by spores. ✓ (True)
- B. They make their own food. ✗ (False - they are decomposers, no chlorophyll)
- C. They feed on dead or decaying matter. ✓ (True - they are saprotrophs)
- D. They have chlorophyll. ✗ (False - they lack chlorophyll)
7. Answer: (2) Fungus [2]
Explanation:
Following the flowchart:
- Does it make its own food? No → Go to next question.
- Does it reproduce by spores? Yes → Fungus.
The organism matches the path to Fungus.
8. Answer: (2) Frog, lizard, eagle [2]
Explanation:
Vertebrates have a backbone.
- (1) Earthworm, snail, spider → All invertebrates (no backbone).
- (2) Frog (amphibian), lizard (reptile), eagle (bird) → All vertebrates ✓
- (3) Jellyfish, starfish, crab → All invertebrates.
- (4) Butterfly, beetle, grasshopper → All insects (invertebrates).
9. Answer: (2) Pupa [2]
Explanation:
Butterfly life cycle (complete metamorphosis):
Egg → Larva (caterpillar) → Pupa (chrysalis) → Adult butterfly
The stage after larva is pupa.
10. Answer: (2) B and C only [2]
Explanation:
For a fair test comparing white bread vs. wholemeal bread:
- A. Type of bread → This is the changed variable (independent variable), must be different.
- B. Amount of water added → Must be kept same (controlled variable). ✓
- C. Temperature of surroundings → Must be kept same (controlled variable). ✓
- D. Time taken for mould to appear → This is the measured variable (dependent variable), not controlled.
11. Answer: (3) Fern [2]
Explanation:
- Hibiscus, Orchid, Mango tree → Flowering plants (produce flowers and fruits).
- Fern → Non-flowering plant (reproduces by spores, no flowers/fruits).
12. Answer: (3) Y [2]
Explanation:
Mammals are vertebrates (have backbone) and do not make their own food.
- W: Makes own food → Plant.
- X: Reproduces by spores → Fungus.
- Y: No food-making, no spores, has backbone → Animal (vertebrate) → Mammal possible.
- Z: No backbone → Invertebrate.
13. Answer: (2) They can only be seen under a microscope. [2]
Explanation:
Micro-organisms are organisms too small to be seen with the naked eye; they require a microscope. This is the defining characteristic. Bacteria are single-celled and microscopic.
14. Answer: (1) Egg → Larva → Pupa → Adult [2]
Explanation:
Mosquito undergoes complete metamorphosis:
Egg → Larva (wriggler) → Pupa (tumbler) → Adult mosquito
- (2) is incomplete metamorphosis (e.g., grasshopper).
- (3) and (4) have incorrect stage order.
SECTION B: Structured Questions (22 marks)
15. (a) The gills produce and release spores for reproduction. [1]
Marking note: Accept "produce spores" or "release spores" or "for reproduction".
(b) The mushroom is a decomposer (fungus) that feeds on dead/decaying organic matter. The rotting log provides food (nutrients) for the mushroom. [1]
Marking note: Must mention decomposer/fungus feeding on dead matter.
(c) No, a mushroom is not a plant. It is a fungus. It does not have chlorophyll and cannot make its own food (unlike plants). [1]
Marking note: Must state "No" and give a valid reason (no chlorophyll / cannot photosynthesise / is a fungus).
16. [3]
| Plants | Animals | Fungi | Bacteria |
|---|---|---|---|
| Moss, Fern | Eagle, Shark | Mould, Yeast | (none given) |
Marking: ½ mark per correct placement (6 organisms × ½ = 3 marks).
Note: Yeast is a fungus (single-celled), not a bacterium. Moss and fern are non-flowering plants. Eagle (bird) and shark (fish) are vertebrates/animals.
17. (a) Birds [1]
Explanation: Birds have feathers and lay eggs.
(b) Amphibians [1]
Explanation: Amphibians (e.g., frog) breathe through gills as young (tadpole) and lungs as adult; they have moist skin.
(c) Mammals give birth to live young (live birth), while reptiles lay eggs. [1]
Marking note: Accept "Mammals: live birth; Reptiles: lay eggs" or equivalent.
18. (a) Tadpole with hind legs / Tadpole with back legs [1]
Explanation: Stage P shows a tadpole that has developed hind legs but not front legs yet.
(b) Any two differences: [2]
- Tadpole lives in water; adult frog lives on land and in water.
- Tadpole breathes through gills; adult frog breathes through lungs (and skin).
- Tadpole has a tail; adult frog has no tail.
- Tadpole has no legs; adult frog has four legs.
- Tadpole eats algae/plants; adult frog eats insects (carnivore).
Marking: 1 mark per valid difference.
19. (a) Mould (or mould spores growing into mould) [1]
(b) Mould spores in the air landed on the bread. The bread provided food, and the warm, moist, dark conditions in the sealed bag allowed the spores to germinate and grow into mould. [1]
Marking note: Must mention spores landing + suitable conditions (food, warmth, moisture).
(c) Keep the bread in the refrigerator (low temperature) / Keep the bread dry / Store in an airtight container with no moisture / Add preservatives. [1]
Marking note: Any one valid method to slow mould growth.
20. (a) Plants [1]
Explanation: Organisms that make their own food are plants (photosynthesis).
(b) 1. It does not make its own food (heterotrophic).
2. It reproduces by spores. [2]
Marking: 1 mark per characteristic. These are the two decision criteria leading to Group B.
(c) Insect (e.g., butterfly, beetle, grasshopper) / Spider / Snail / Earthworm / Jellyfish / Any invertebrate animal. [1]
Explanation: Group D = No food-making + No spores + No backbone = Invertebrate animals.
21. (a) P and R [1]
Explanation: Flowering plants bear flowers and fruits, and reproduce by seeds (not spores).
(b) Q and S [1]
Explanation: Non-flowering plants do not bear flowers or fruits; they reproduce by spores.
(c) The fruit protects the seeds and helps in seed dispersal. [1]
Marking note: Accept "protects seeds" or "disperses seeds" or both.
22. (a) Plant cell [1]
(b) Chloroplasts contain chlorophyll and trap light energy for photosynthesis (food-making). [1]
(c) Cell wall / Large vacuole (accept either) [1]
Explanation: Plant cells have cell wall (rigid structure) and large central vacuole; animal cells lack these.
SECTION C: Open-Ended Questions (10 marks)
23. (a) Set-up A and Set-up B [1]
Explanation: Only difference is light (A: light, B: dark). Other variables (water, temperature) are the same.
(b) Mould does not need light to grow. / Light is not necessary for mould growth. [1]
Explanation: Mould grew in both light (A) and dark (B, D), so light is not a required condition.
(c) The temperature in Set-up D (5°C in refrigerator) is too low for mould to grow actively. Mould grows best in warm conditions (around 30°C). Low temperature slows down or stops the metabolic activities of mould. [2]
Marking:
- 1 mark: Identifying low temperature as the reason.
- 1 mark: Explaining that low temperature slows/stops mould growth/metabolism.
24. (a) Any two differences: [2]
- Young plant has small roots; adult plant has extensive/large root system.
- Young plant has short/soft stem; adult plant has tall/woody stem.
- Young plant has few small leaves; adult plant has many large leaves.
- Young plant has no flowers/fruits; adult plant has flowers and fruits.
- Young plant is smaller in size; adult plant is larger.
Marking: 1 mark per valid difference.
(b) Two conditions for seed germination: [2]
- Water (moisture) – to activate enzymes and swell the seed.
- Air (oxygen) – for respiration to release energy.
- Suitable/Warm temperature – for enzyme activity.
Marking: 1 mark per condition (any two). "Sunlight" is NOT needed for germination (needed later for photosynthesis).
25. (a) Fungi (or Fungus) [1]
(b) The organism does not make its own food (so it is not a plant), reproduces by spores (characteristic of fungi), feeds on dead/decaying matter (saprotrophic nutrition, typical of fungi), and cannot move (unlike animals). These characteristics match fungi. [2]
Marking:
- 1 mark: Correct group identification in reasoning (not plant, not animal, not bacteria).
- 1 mark: Linking at least two observed characteristics to fungi traits.
(c) It helps in decomposition, breaking down dead organic matter and recycling nutrients back into the environment/soil for plants to use. [1]
Marking note: Accept "decomposer", "recycles nutrients", "breaks down dead matter", "returns nutrients to soil".
END OF ANSWER KEY
Total Marks: 60
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