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Primary 3 Science Weighted Assessment 2 (Term 3) Paper 1

Free P3 Science WA2 Paper 1, Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 3 Science From Real Exams Generated by Claude Sonnet 4 Updated 2026-08-17

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Questions

TuitionGoWhere Primary 3 Science WA2 2026

Name: ______________________ Class: ______ Date: ____________

Duration: 45 minutes
Total Marks: 50

Section A: Multiple Choice Questions (15 marks)

Choose the correct answer and write the letter (A, B, C, or D) in the brackets provided. Each question is worth 1 mark.

1. Which of the following is a living thing?

(A) Rock
(B) Water
(C) Mushroom
(D) Chair

( )

2. What do plants need to make their own food?

(A) Sunlight, water, and air
(B) Soil, water, and food
(C) Air, soil, and darkness
(D) Water, food, and soil

( )

3. Which part of the plant absorbs water and minerals from the soil?

(A) Leaf
(B) Stem
(C) Root
(D) Flower

( )

4. The life cycle of a butterfly has __________ stages.

(A) 2
(B) 3
(C) 4
(D) 5

( )

5. Which sense organ do we use to detect smell?

(A) Eyes
(B) Ears
(C) Nose
(D) Tongue

( )

6. Ahmad is playing football at the East Coast Park. Which body part helps him to kick the ball?

(A) Arms
(B) Legs
(C) Head
(D) Hands

( )

7. Which of the following is a healthy habit?

(A) Skipping breakfast every day
(B) Sleeping for only 4 hours
(C) Eating fruits and vegetables daily
(D) Playing video games all night

( )

8. What is the function of the lungs?

(A) To pump blood around the body
(B) To breathe in oxygen and breathe out carbon dioxide
(C) To digest food
(D) To help us move

( )

9. Which animal goes through incomplete metamorphosis?

(A) Butterfly
(B) Frog
(C) Cockroach
(D) Mosquito

( )

10. Mei Ling touched a hot kettle and quickly pulled her hand away. Which sense did she use to feel the heat?

(A) Sight
(B) Touch
(C) Smell
(D) Taste

( )

11. Which group of animals are all mammals?

(A) Chicken, duck, goose
(B) Cat, dog, dolphin
(C) Fish, frog, snake
(D) Bee, ant, butterfly

( )

12. What is the function of the stem in a plant?

(A) To absorb water from soil
(B) To transport water and minerals to other parts of the plant
(C) To make food for the plant
(D) To produce seeds

( )

13. The heart is found in which part of the body?

(A) Head
(B) Chest
(C) Stomach
(D) Leg

( )

14. Which of the following animals is an insect?

(A) Spider
(B) Scorpion
(C) Ladybird
(D) Centipede

( )

15. Why is it important to wash our hands before eating?

(A) To make our hands smell nice
(B) To remove germs that can make us sick
(C) To make our food taste better
(D) To keep our nails clean

( )

Section B: Short Answer Questions (20 marks)

Answer all questions in the spaces provided.

16. Look at the pictures below showing the life cycle of a chicken.

[A: Egg] → [B: Chick] → [C: Adult Chicken] → (lays eggs)

(a) What hatches from the egg? (1 mark)

(b) How is the life cycle of a chicken different from the life cycle of a butterfly? (2 marks)

17. Siti noticed that her grandmother's orchid plant was dying. The leaves were turning yellow and drooping.

(a) Name ONE thing that the plant might not be getting enough of. (1 mark)

(b) What should Siti do to help the plant become healthy again? (1 mark)

18. The table below shows the characteristics of some animals.

Animal	Number of Legs	Body Covering	Gives Birth to Live Young
Chicken	2	Feathers	No
Cat	4	Fur	Yes
Fish	0	Scales	No
Butterfly	6	-	No

(a) Which animal is a mammal? Give ONE reason. (2 marks)

(b) Which animal is an insect? Give ONE reason. (2 marks)

19. Raj went to the Singapore Zoo with his family.

(a) He saw a crocodile lying in the sun. Why do crocodiles need to lie in the sun? (1 mark)

(b) Name ONE other animal that needs to lie in the sun to keep warm. (1 mark)

20. Look at the diagram of the human body below.

        [Head - Brain]
             |
    [Arms]--[Chest - Heart, Lungs]--[Arms]
             |
        [Stomach - Digestive system]
             |
          [Legs]

(a) Which organ pumps blood around the body? (1 mark)

(b) State ONE function of the brain. (1 mark)

21. Wei Ming has a cold and cannot smell his food.

(a) Which sense organ is affected when Wei Ming has a cold? (1 mark)

(b) Why might Wei Ming also find that his food does not taste as good? (1 mark)

22. Complete the table below about the five senses. (3 marks)

Sense	Sense Organ	What It Helps Us Detect
Sight	Eyes	Light and colours
Hearing	__________	Sounds
Smell	Nose	__________
Taste	Tongue	Different tastes
Touch	__________	Texture, temperature

23. Mrs Tan wants to keep her family healthy. Give TWO healthy habits she should teach her children. (2 marks)

Section C: Word Problems (15 marks)

Answer all questions in the spaces provided.

24. Kumar planted a bean seed in a pot at his HDB flat. After one week, he observed that the seed had germinated and a small plant had grown.

(a) What THREE things did Kumar need to give the seed for it to grow? (3 marks)

(b) Kumar noticed that his plant was growing towards the window. Why do you think this happened? (2 marks)

25. The diagram below shows the life cycle of a frog.

Image pending generation for this question.

[Eggs in water] → [Tadpole] → [Tadpole with legs] → [Froglet] → [Adult Frog]

(a) Where does a frog lay its eggs? (1 mark)

(b) How does a tadpole breathe in water? (1 mark)

26. Sarah's class went on a nature walk at the Bukit Timah Nature Reserve. They saw many different plants and animals.

(a) Sarah saw a plant with large, green leaves. Explain why leaves are important for the plant. (2 marks)

(b) She also saw a bird feeding worms to its young. What type of life cycle does a bird have? (1 mark)

27. Auntie Lily visits the doctor because she has been feeling tired. The doctor told her that she needs to take better care of her body.

(a) Name TWO things Auntie Lily can do to take better care of her body. (2 marks)

(b) Explain why getting enough sleep is important for our body. (1 mark)

End of Paper

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Answers

TuitionGoWhere Primary 3 Science WA2 2026 - Answer Key

Total Marks: 50

Section A: Multiple Choice Questions (15 marks)

Question	Answer	Explanation
1	C	Mushroom is a living thing (fungus). Rocks, water, and chairs are non-living things.
2	A	Plants need sunlight, water, and air (carbon dioxide) to make their own food through photosynthesis.
3	C	Roots absorb water and minerals from the soil.
4	C	Butterfly life cycle has 4 stages: egg → larva (caterpillar) → pupa (chrysalis) → adult butterfly.
5	C	The nose is the sense organ for smell.
6	B	Legs are used for kicking a ball.
7	C	Eating fruits and vegetables daily is a healthy habit.
8	B	Lungs help us breathe in oxygen and breathe out carbon dioxide.
9	C	Cockroach goes through incomplete metamorphosis (3 stages: egg → nymph → adult).
10	B	Touch sense allows us to feel heat, cold, texture, and pain.
11	B	Cat, dog, and dolphin are all mammals (give birth to live young, have fur/hair, feed young with milk).
12	B	The stem transports water and minerals from the roots to other parts of the plant.
13	B	The heart is found in the chest.
14	C	Ladybird is an insect (6 legs, 3 body parts). Spiders and scorpions have 8 legs.
15	B	Washing hands removes germs that can make us sick.

Section B: Short Answer Questions (20 marks)

16. (a) A chick hatches from the egg. (1 mark)

(b) The life cycle of a chicken has 3 stages (egg → chick → adult chicken), while the life cycle of a butterfly has 4 stages. (1 mark) The chicken goes through incomplete metamorphosis / does not go through metamorphosis, while the butterfly goes through complete metamorphosis. (1 mark)

17. (a) Accept any ONE: Water / Sunlight / Air (1 mark)

(b) Accept any ONE related to the answer in (a):

Water the plant regularly
Move the plant to a place with more sunlight
Ensure the plant has good air circulation (1 mark)

18. (a) Cat is a mammal. (1 mark) It gives birth to live young / It has fur. (1 mark)

(b) Butterfly is an insect. (1 mark) It has 6 legs / It has 3 body parts. (1 mark)

19. (a) Crocodiles are cold-blooded animals. They need to lie in the sun to keep their bodies warm. (1 mark)

(b) Accept any ONE: Snake / Lizard / Turtle / Tortoise / Iguana (1 mark)

20. (a) The heart pumps blood around the body. (1 mark)

(b) Accept any ONE:

The brain controls our body movements
The brain helps us think
The brain controls our senses
The brain helps us remember things (1 mark)

21. (a) The nose is affected. (1 mark)

(b) The sense of smell helps us taste food better. When the nose is blocked, we cannot smell the food properly, so food does not taste as good. / Smell and taste work together. (1 mark)

22. (3 marks - 1 mark each)

Sense	Sense Organ	What It Helps Us Detect
Sight	Eyes	Light and colours
Hearing	Ears	Sounds
Smell	Nose	Smells / Odours
Taste	Tongue	Different tastes
Touch	Skin	Texture, temperature

23. Accept any TWO: (2 marks - 1 mark each)

Wash hands before eating / after using the toilet
Eat a balanced diet / Eat fruits and vegetables
Exercise regularly
Get enough sleep (8-10 hours)
Brush teeth twice a day
Drink plenty of water
Take a bath daily

Section C: Word Problems (15 marks)

24. (a) The THREE things are: (3 marks - 1 mark each)

Water
Sunlight
Air

(b) Plants grow towards the light because they need sunlight to make food. (1 mark) This movement towards light is called phototropism. / The plant is trying to get more sunlight for photosynthesis. (1 mark)

25. (a) A frog lays its eggs in water. (1 mark)

(b) A tadpole breathes using gills. (1 mark)

(c) An adult frog breathes using lungs. (1 mark) The tadpole lives in water and uses gills to breathe underwater, but the adult frog lives on land and uses lungs to breathe air. / Adult frogs can also breathe through their moist skin. (1 mark)

26. (a) Leaves are important because they make food for the plant. (1 mark) The leaves absorb sunlight and carbon dioxide from the air to make food through photosynthesis. (1 mark)

(b) Birds have a 3-stage life cycle / Birds do not go through metamorphosis. (Egg → Young bird/Chick → Adult bird) (1 mark)

27. (a) Accept any TWO: (2 marks - 1 mark each)

Get enough sleep (8 hours)
Eat healthy food / balanced diet
Exercise regularly
Drink plenty of water
Take a rest when tired
Visit the doctor for regular check-ups

(b) Accept any ONE:

Sleep helps our body rest and repair itself
Sleep gives us energy for the next day
Sleep helps our brain function properly
Sleep helps us grow (1 mark)

End of Answer Key

Marking Scheme Summary

Section	Questions	Marks
A	MCQ (1-15)	15
B	Short Answer (16-23)	20
C	Word Problems (24-27)	15
Total		50