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Primary 3 Science Diversity Quiz

Free P3 Science Diversity quiz, Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 3 Science From Real Exams Generated by DeepSeek V4 Flash Sample 02 Updated 2026-08-17

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Questions

Primary 3 Science Quiz - Diversity

Name: _________________________ Class: _________________________ Date: _________________________ Score: ________ / 20

Duration: 30 minutes Total Marks: 20

Instructions:

This quiz has 20 questions on the topic of Diversity.
Answer all questions in the spaces provided.
For multiple-choice questions, circle the correct answer.
For open-ended questions, write your answer clearly.

Section A: Living and Non-Living Things (Questions 1 - 5)

1. Which of the following is a living thing? [1 mark]

A) A wooden chair
B) A plastic doll
C) A sunflower plant
D) A glass of water

Answer: ________

2. A student saw a toy car moving on its own. She said, "The toy car is a living thing because it can move." Do you agree with her? Explain your answer. [2 marks]

Answer: _______________________________________________________________________

3. Match each characteristic of a living thing with the correct example. Draw a line. [2 marks]

Characteristic	Example
A. Grows	A cat gives birth to kittens
B. Reproduces	A plant's roots grow longer
C. Responds to changes	A fish needs oxygen from water
D. Needs air	A mimosa plant closes its leaves when touched

4. Look at the list of objects below. [1 mark]

(i) A bird
(ii) A rock
(iii) A mushroom
(iv) A bicycle

How many of these objects are living things?

A) 1
B) 2
C) 3
D) 4

Answer: ________

5. A balloon is filled with air. When more air is pumped in, the balloon gets bigger. Is this an example of a living thing growing? Explain your answer. [2 marks]

Answer: _______________________________________________________________________

Section B: Classifying Living Things (Questions 6 - 10)

6. Study the table below. It shows the body covering of four animals. [2 marks]

Animal	Body Covering
W	Feathers
X	Fur
Y	Scales
Z	Dry, scaly skin

Which animal is most likely a fish?

A) W
B) X
C) Y
D) Z

Answer: ________

7. A student sees an animal with wings and feathers. It can fly. Which group of animals does it belong to? [1 mark]

A) Mammals
B) Reptiles
C) Birds
D) Insects

Answer: ________

8. The picture shows a frog. Frogs have smooth, moist skin and live both on land and in water. Which group of animals do frogs belong to? [1 mark]

Diagram for Q8 (P3 Science)

Generated diagram for Q8.

A) Fish
B) Amphibians
C) Reptiles
D) Mammals

Answer: ________

9. Which of the following is NOT a characteristic of an insect? [1 mark]

A) It has six legs
B) Its body is divided into three parts
C) It has fur on its body
D) It has two antennae

Answer: ________

10. A penguin is a bird, but it cannot fly. Why is it still classified as a bird? [2 marks]

Answer: _______________________________________________________________________

Section C: Fungi and Bacteria (Questions 11 - 15)

11. A student found some mould growing on a piece of bread. Mould is a type of ________. [1 mark]

A) plant
B) animal
C) fungus
D) mineral

Answer: ________

12. Are bacteria living things? Circle the correct answer. [1 mark]

A) Yes, because they can grow and reproduce.
B) No, because they are too small to see.
C) Yes, because they are always helpful.
D) No, because they are not animals.

Answer: ________

13. Which of the following statements about fungi is true? [1 mark]

A) All fungi are harmful to humans.
B) Fungi are a type of plant.
C) Some fungi, like mushrooms, can be eaten.
D) Fungi cannot grow on their own.

Answer: ________

14. Some bacteria in our intestines help us digest food. This shows that bacteria can be ________. [1 mark]

A) harmful
B) helpful
C) non-living
D) dangerous

Answer: ________

15. A student says, "Mushrooms are plants because they grow in the soil." Do you agree? Explain your answer. [2 marks]

Answer: _______________________________________________________________________

Section D: Materials and Their Properties (Questions 16 - 20)

16. A student wants to make a raincoat. Which property should the material have? [1 mark]

A) It should be able to absorb water.
B) It should be waterproof.
C) It should be transparent.
D) It should be very hard.

Answer: ________

17. Look at the table below. It shows the properties of four materials. [2 marks]

Material	Flexible?	Waterproof?	Transparent?
P	Yes	No	Yes
Q	No	Yes	No
R	Yes	Yes	No
S	No	No	Yes

Which material would be best for making a window?

A) P
B) Q
C) R
D) S

Answer: ________

18. A spoon is made of metal. Why is metal a good material for making a spoon? [1 mark]

A) It is soft and flexible.
B) It is strong and hard.
C) It is transparent.
D) It can absorb water.

Answer: ________

19. Which of the following is a natural material? [1 mark]

A) Plastic
B) Glass
C) Wood
D) Nylon

Answer: ________

20. A student has two cups. Cup A is made of paper. Cup B is made of plastic. The student pours the same amount of hot water into both cups. After 5 minutes, Cup A feels wet on the outside, but Cup B does not. Explain this observation. [2 marks]

Answer: _______________________________________________________________________

END OF QUIZ

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Answers

Primary 3 Science Quiz - Diversity (Answer Key)

Total Marks: 20

Section A: Living and Non-Living Things (Questions 1 - 5)

1. Answer: C) A sunflower plant [1 mark]

Explanation: A sunflower plant is a living thing because it can grow, needs water and sunlight, and can reproduce. The other options (wooden chair, plastic doll, glass of water) are all non-living things. They do not grow, reproduce, or need food.

Common Mistake: Students might think a doll is living because it looks like a person, or that water is living because it is needed by living things.

2. Answer: No, I do not agree. [1 mark for correct answer] The toy car is not a living thing because it cannot grow, reproduce, or need food and water. It only moves because of a battery or a push. [1 mark for correct explanation]

Explanation: Movement alone does not make something living. A toy car moves because of a motor or a push, not because it is alive. Living things move by themselves, but they also do other things like grow, need food and water, and reproduce. The toy car does not do these things.

Marking Notes:

Award 1 mark for stating disagreement.
Award 1 mark for a valid reason (e.g., cannot grow, does not need food, only moves because of a battery).

3. Answer: [2 marks - 0.5 marks for each correct match]

A (Grows) → A plant's roots grow longer
B (Reproduces) → A cat gives birth to kittens
C (Responds to changes) → A mimosa plant closes its leaves when touched
D (Needs air) → A fish needs oxygen from water

Explanation:

Grows: A plant's roots getting longer is a clear example of growth in a living thing.
Reproduces: A cat having kittens is how cats make new living things of the same kind.
Responds to changes: The mimosa plant closing its leaves when touched is a response to a stimulus (touch).
Needs air: A fish needs oxygen (which is in the air/water) to survive.

4. Answer: B) 2 [1 mark]

Explanation: The living things in the list are the bird and the mushroom. A rock and a bicycle are non-living. So there are 2 living things.

Common Mistake: Students might not know that a mushroom is a living thing (it is a fungus). They might also think a rock is living because it is found in nature.

5. Answer: No, this is not an example of a living thing growing. [1 mark for correct answer] The balloon is getting bigger because more air is being added, not because it is growing by itself. Living things grow by taking in food and using it to make new cells. [1 mark for correct explanation]

Explanation: Growth in living things means getting bigger because cells inside the body are dividing and increasing. A balloon getting bigger is just being stretched by air. It is not a living thing, so it cannot grow by itself.

Marking Notes:

Award 1 mark for stating "No".
Award 1 mark for explaining that the balloon is not growing by itself, or that it is just being filled with air.

Section B: Classifying Living Things (Questions 6 - 10)

6. Answer: C) Y [2 marks]

Explanation: Fish have scales on their bodies. In the table, animal Y has scales. Animal W has feathers (bird), X has fur (mammal), and Z has dry, scaly skin (reptile).

Marking Notes: Award 2 marks for correct answer. Award 1 mark if the student correctly identifies that scales belong to fish but chooses the wrong letter.

7. Answer: C) Birds [1 mark]

Explanation: Animals with wings and feathers that can fly are birds. While some insects also have wings and can fly, they do not have feathers. Feathers are a unique characteristic of birds.

8. Answer: B) Amphibians [1 mark]

Explanation: Frogs are amphibians. They have smooth, moist skin and can live both on land and in water. This is a key characteristic of amphibians.

Common Mistake: Students might think frogs are reptiles because they live in water and on land, but reptiles have dry, scaly skin.

9. Answer: C) It has fur on its body [1 mark]

Explanation: Insects do not have fur. They have a hard outer covering called an exoskeleton. Insects have six legs, a body divided into three parts (head, thorax, abdomen), and two antennae. Fur is a characteristic of mammals.

10. Answer: A penguin is still classified as a bird because it has feathers. [2 marks]

Explanation: The main characteristic that defines a bird is having feathers. Even though a penguin cannot fly, it still has feathers, a beak, and lays eggs. These are all bird characteristics. Flight is not a requirement for being a bird.

Marking Notes:

Award 1 mark for mentioning feathers.
Award 1 mark for a clear explanation that flight is not necessary to be a bird.

Section C: Fungi and Bacteria (Questions 11 - 15)

11. Answer: C) fungus [1 mark]

Explanation: Mould is a type of fungus. Fungi are a group of living things that are not plants or animals. They include mould, mushrooms, and yeast.

12. Answer: A) Yes, because they can grow and reproduce. [1 mark]

Explanation: Bacteria are living things. They are very small, but they can grow, reproduce, and need food. They are not plants or animals, but they are still alive.

Common Mistake: Students might think bacteria are not living because they are too small to see.

13. Answer: C) Some fungi, like mushrooms, can be eaten. [1 mark]

Explanation: Some fungi are edible, like the mushrooms we buy at the supermarket. However, not all fungi are safe to eat. Fungi are not plants; they are a separate group of living things.

14. Answer: B) helpful [1 mark]

Explanation: Bacteria that help us digest food are helpful to our bodies. This shows that not all bacteria are harmful. Some bacteria are very useful.

15. Answer: No, I do not agree. [1 mark for correct answer] Mushrooms are not plants because they cannot make their own food. They are fungi. [1 mark for correct explanation]

Explanation: Plants can make their own food using sunlight (photosynthesis). Mushrooms cannot do this. They get their food from dead or decaying matter. This is why they are classified as fungi, not plants.

Marking Notes:

Award 1 mark for stating disagreement.
Award 1 mark for a valid reason (e.g., cannot make its own food, is a fungus).

Section D: Materials and Their Properties (Questions 16 - 20)

16. Answer: B) It should be waterproof. [1 mark]

Explanation: A raincoat is used to keep a person dry in the rain. Therefore, the material must be waterproof, meaning it does not let water pass through.

17. Answer: A) P [2 marks]

Explanation: A window needs to be transparent so we can see through it. It should also be waterproof to keep rain out. Material P is both transparent and waterproof. Material S is transparent but not waterproof.

Marking Notes: Award 2 marks for correct answer. Award 1 mark if the student correctly identifies that the material needs to be transparent but chooses the wrong material.

18. Answer: B) It is strong and hard. [1 mark]

Explanation: A spoon needs to be strong so it does not bend or break when we use it to scoop food. Metal is a strong and hard material, making it suitable for this purpose.

19. Answer: C) Wood [1 mark]

Explanation: Wood comes from trees, which are natural. Plastic, glass, and nylon are all man-made materials. They are made by people from natural resources.

Common Mistake: Students might think glass is natural because it is made from sand, but sand is processed by humans to make glass, so it is man-made.

20. Answer: Paper is not waterproof, so it absorbs water from the hot water inside the cup. [1 mark for identifying paper absorbs water] Plastic is waterproof, so it does not absorb water. [1 mark for identifying plastic is waterproof]

Explanation: The paper cup feels wet because the paper material absorbs the water. The plastic cup does not feel wet because plastic is a waterproof material. It does not let water pass through or get absorbed.

Marking Notes:

Award 1 mark for stating that paper absorbs water/is not waterproof.
Award 1 mark for stating that plastic is waterproof/does not absorb water.

END OF ANSWER KEY