Primary 3 Science Weighted Assessment 2 (Term 3) Paper 5

TuitionGoWhere Primary 3 Science WA2 2026 (Version 5)

Name: ______________________ Class: ______ Date: ____________

Duration: 45 minutes
Total Marks: 50

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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. All living things need __________ to stay alive.

(A) computers
(B) food, water, and air
(C) toys and games
(D) money

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2. Which part of the plant carries out photosynthesis?

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

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3. Which of the following animals is a reptile?

(A) Frog
(B) Eagle
(C) Gecko
(D) Rabbit

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4. The nose helps us to:

(A) Hear sounds
(B) See colours
(C) Smell odours
(D) Taste food

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5. Mrs Lee is cooking at her HDB flat in Ang Mo Kio. She uses her sense of smell to know that her curry is ready. Which sense organ is she using?

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

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6. Which organ helps to remove waste from our blood?

(A) Heart
(B) Lungs
(C) Kidneys
(D) Brain

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7. The life cycle stage where a butterfly cannot move or eat is the:

(A) Egg
(B) Larva
(C) Pupa
(D) Adult

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8. Which of the following is an example of a mammal that lives in water?

(A) Shark
(B) Dolphin
(C) Octopus
(D) Seahorse

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9. Healthy teeth can be maintained by:

(A) Eating lots of candy
(B) Drinking only soft drinks
(C) Brushing teeth twice a day
(D) Never visiting the dentist

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10. Which animal undergoes incomplete metamorphosis?

(A) Butterfly
(B) Mosquito
(C) Dragonfly
(D) Beetle

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11. The function of the heart is to:

(A) Break down food
(B) Pump blood to all parts of the body
(C) Help us breathe
(D) Control our thinking

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12. Which of the following animals breathes using lungs only?

(A) Fish
(B) Tadpole
(C) Bird
(D) Jellyfish

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13. What do we call the outer covering of an insect?

(A) Fur
(B) Feathers
(C) Scales
(D) Exoskeleton

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14. Joshua can feel the rough surface of a tree bark. Which sense organ did he use?

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

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15. Why is it important to exercise regularly?

(A) It makes us tired
(B) It keeps our body weak
(C) It keeps our muscles and bones strong
(D) It makes us sleep less

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Section B: Short Answer Questions (20 marks)

Answer all questions in the spaces provided.

16. Look at the four animals below.

[Whale]  [Bat]  [Crocodile]  [Penguin]

(a) Which TWO animals are mammals? (2 marks)

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(b) Give ONE characteristic that all mammals share. (1 mark)

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17. Study the diagram of a plant's structure.

        [Flower]
           |
    [Leaf]---[Leaf]
           |
        [Stem]
           |
       [Roots]

(a) Which part absorbs sunlight to make food? (1 mark)

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(b) Name TWO things that the roots absorb from the soil. (2 marks)

1. ---

2. ---

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18. The diagram below shows the life cycle of a beetle.

[Egg] → [Larva (grub)] → [Pupa] → [Adult beetle]

(a) How many stages are in the beetle's life cycle? (1 mark)

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(b) Does the beetle go through complete or incomplete metamorphosis? (1 mark)

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(c) What is the difference between complete and incomplete metamorphosis? (1 mark)

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19. Fill in the table about the human body. (3 marks)

Organ	Function
Heart	___________________________________
Lungs	To take in oxygen and release carbon dioxide
Brain	___________________________________
Stomach	___________________________________

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20. Nurul is having her lunch at the school canteen.

(a) Name TWO senses she uses when eating her food. (2 marks)

1. ---

2. ---

(b) Nurul notices that her friend is coughing. What should Nurul's friend do to prevent spreading germs? (1 mark)

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21. Look at the life cycle of a plant.

[Seed] → [Seedling] → [Young plant] → [Adult plant with flowers] → [Plant with fruits and seeds]

(a) What is the first stage of a plant's life cycle? (1 mark)

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(b) What do we call it when a seed starts to grow? (1 mark)

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(c) Why do plants produce flowers? (1 mark)

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Section C: Word Problems (15 marks)

Answer all questions in the spaces provided.

22. Siti observed tadpoles in a pond at the Singapore Botanic Gardens.

(a) Name the animal group that frogs belong to. (1 mark)

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(b) How does a tadpole breathe underwater? (1 mark)

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(c) Describe TWO changes that happen when a tadpole becomes an adult frog. (2 marks)

1. ---

2. ---

(d) Why is a frog able to live both on land and in water? (1 mark)

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23. Wei Ming's grandfather is 70 years old. He wants to stay healthy.

(a) Name THREE things Wei Ming's grandfather can do to stay healthy. (3 marks)

1. ---

2. ---

3. ---

(b) Why is getting enough rest important for elderly people? (1 mark)

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24. A Primary 3 class visited the Lee Kong Chian Natural History Museum. They saw many different types of animals.

(a) Complete the table below about animal classification. (3 marks)

Animal	Animal Group	ONE Characteristic
Eagle	Bird	___________________
Goldfish	_________	Has scales and gills
Elephant	_________	Gives birth to live young

(b) Name ONE animal that goes through complete metamorphosis. (1 mark)

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25. Auntie Mary grows tomato plants in her garden.

(a) What does a plant need to make its own food? Name THREE things. (3 marks)

1. ---

2. ---

3. ---

(b) Auntie Mary noticed that the plant growing near the wall was bending towards the sunlight. Why does this happen? (1 mark)

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End of Paper

TuitionGoWhere Primary 3 Science WA2 2026 (Version 5) - Answer Key

Total Marks: 50

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Section A: Multiple Choice Questions (15 marks)

Question	Answer	Explanation
1	B	All living things need food, water, and air to survive.
2	C	Leaves carry out photosynthesis to make food for the plant.
3	C	Gecko is a reptile. Frog is an amphibian, eagle is a bird, rabbit is a mammal.
4	C	The nose is the sense organ for smelling odours.
5	C	The nose is used for the sense of smell.
6	C	Kidneys filter blood and remove waste products.
7	C	During the pupa stage, the butterfly cannot move or eat as it transforms.
8	B	Dolphins are mammals that live in water. Sharks are fish.
9	C	Brushing teeth twice a day helps maintain healthy teeth.
10	C	Dragonflies undergo incomplete metamorphosis (3 stages).
11	B	The heart pumps blood to all parts of the body.
12	C	Birds breathe using lungs only. Fish and tadpoles use gills.
13	D	The hard outer covering of an insect is called an exoskeleton.
14	C	Skin is the sense organ for touch, which detects texture.
15	C	Regular exercise keeps muscles and bones strong.

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Section B: Short Answer Questions (20 marks)

16. (a) Whale and Bat are mammals. (2 marks - 1 mark each)

(b) Accept any ONE:

• They give birth to live young
• They have fur/hair
• They feed their young with milk
• They are warm-blooded
• They breathe using lungs (1 mark)

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17. (a) The leaf absorbs sunlight to make food. (1 mark)

(b) (2 marks - 1 mark each)

1. Water
2. Minerals / Nutrients

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18. (a) There are 4 stages in the beetle's life cycle. (1 mark)

(b) The beetle goes through complete metamorphosis. (1 mark)

(c) Accept any ONE:

• Complete metamorphosis has 4 stages; incomplete metamorphosis has 3 stages
• Complete metamorphosis has a pupa stage; incomplete metamorphosis does not have a pupa stage
• In complete metamorphosis, the young looks very different from the adult; in incomplete metamorphosis, the young (nymph) looks similar to the adult (1 mark)

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19. (3 marks - 1 mark each)

Organ	Function
Heart	To pump blood around the body / To circulate blood
Lungs	To take in oxygen and release carbon dioxide
Brain	To control our body / To help us think / To control our senses and movements
Stomach	To digest food / To break down food

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

1. Sight (to see the food)
2. Taste (to taste the food)
3. Smell (to smell the food)
4. Touch (to feel the texture/temperature)

(b) Accept any ONE:

• Cover her mouth when coughing
• Use a tissue when coughing
• Wash hands frequently
• Wear a mask
• Stay home if she is sick (1 mark)

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21. (a) The first stage of a plant's life cycle is the seed. (1 mark)

(b) When a seed starts to grow, it is called germination. (1 mark)

(c) Accept any ONE:

• Plants produce flowers to make seeds
• Plants produce flowers for reproduction
• Flowers help the plant reproduce (1 mark)

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Section C: Word Problems (15 marks)

22. (a) Frogs belong to the amphibian group. (1 mark)

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

(c) Accept any TWO changes: (2 marks - 1 mark each)

1. Legs grow / develop
2. Tail disappears / becomes shorter
3. Gills disappear and lungs develop
4. Body shape changes
5. Can breathe air using lungs
6. Can live on land

(d) Accept any ONE:

• A frog has lungs to breathe on land and can also breathe through its moist skin
• A frog is an amphibian that can survive in both environments
• A frog can breathe using lungs on land and absorb oxygen through its skin in water (1 mark)

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23. (a) Accept any THREE: (3 marks - 1 mark each)

1. Exercise regularly / go for walks
2. Eat healthy food / balanced diet
3. Get enough sleep / rest
4. Drink plenty of water
5. Go for regular medical check-ups
6. Stay socially active / spend time with family
7. Avoid smoking and excessive alcohol

(b) Accept any ONE:

• Rest helps the body recover and repair itself
• Rest gives energy for daily activities
• Rest helps prevent tiredness and illness
• Elderly people need more rest as their bodies take longer to recover (1 mark)

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24. (a) (3 marks - 1 mark each)

Animal	Animal Group	ONE Characteristic
Eagle	Bird	Has feathers / Has wings / Has a beak / Lays eggs
Goldfish	Fish	Has scales and gills
Elephant	Mammal	Gives birth to live young

(b) Accept any ONE: Butterfly / Mosquito / Beetle / Housefly / Bee / Ant (1 mark)

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25. (a) A plant needs these THREE things to make food: (3 marks - 1 mark each)

1. Sunlight
2. Water
3. Air / Carbon dioxide

(b) Accept any ONE:

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

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End of Answer Key

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Marking Scheme Summary

Section	Questions	Marks
A	MCQ (1-15)	15
B	Short Answer (16-21)	20
C	Word Problems (22-25)	15
Total		50