Primary 3 Science Light Quiz

Primary 3 Science Quiz - Light

Name: ___________________________
Class: _______________
Date: _______________
Score: _______ / 30

Duration: 40 minutes
Total Marks: 30

Instructions:

• This quiz is about the topic of Light.
• Answer all 20 questions.
• Section A: Circle the correct letter (1 mark each).
• Section B: Fill in the blanks (1 mark each).
• Section C: Short answer questions (2 marks each).
• Write your answers clearly in the spaces provided.

Section A (Questions 1–10, 1 mark each, total 10 marks)

1. Which of the following materials lets most light pass through so we can see clearly through it?
   A) Wooden door
   B) Clear glass window
   C) Thick metal sheet
   D) Concrete wall
   Answer: ______

2. A material that does not let any light pass through is called ________.
   A) transparent
   B) see-through
   C) opaque
   D) shiny
   Answer: ______

3. Which of these is a natural source of light?
   A) Torchlight
   B) The Sun
   C) Television screen
   D) Lamp
   Answer: ______

4. Which of these is NOT a source of light?
   A) Candle
   B) Moon
   C) Light bulb
   D) Firefly
   Answer: ______

5. We need light to see objects because light ________.
   A) makes objects bigger
   B) travels from the source to our eyes
   C) changes the colour of objects
   D) cools the surroundings
   Answer: ______

6. Which material is most likely to be opaque?
   A) Plastic wrap
   B) Tissue paper
   C) Cardboard
   D) Eyeglass lens
   Answer: ______

7. A shadow is formed when light is ________ by an object.
   A) absorbed completely
   B) blocked
   C) made brighter
   D) reflected away
   Answer: ______

8. Which of the following is a man-made source of light?
   A) Stars
   B) Glow stick
   C) Sun
   D) Lightning
   Answer: ______

9. If you stand in a dark room with no light, you will ________.
   A) see everything clearly
   B) not be able to see objects
   C) see only red colours
   D) see shadows only
   Answer: ______

10. Which statement is true?
    A) All objects give out light.
    B) Only living things give out light.
    C) A source of light gives out its own light.
    D) The Moon is a source of light.
    Answer: ______

Section B (Questions 11–15, 1 mark each, total 5 marks)

11. A material that lets some light through but we cannot see clearly through it is called __________________.
    Answer: __________________

12. Light travels in __________________ lines.
    Answer: __________________

13. The dark shape on the ground behind you on a sunny day is your __________________.
    Answer: __________________

14. The Sun is a __________________ source of light (natural / man-made).
    Answer: __________________

15. When light cannot pass through a material, the material is __________________ (transparent / opaque).
    Answer: __________________

Section C (Questions 16–20, 2 marks each, total 10 marks)

16. Explain why we cannot see through a wooden table.
    Answer:

17. A boy shines a torch at a ball in a dark room. A shadow appears on the wall.
    (a) What must be between the torch and the wall for a shadow to form?
    (b) Why is the shadow formed?
    Answer:

18. Name two natural sources of light and two man-made sources of light.
    Answer:
    Natural: ____________________, ____________________
    Man-made: ____________________, ____________________

19. Mei places a clear plastic ruler, a sheet of aluminium foil, and a tissue paper on a table. She shines a lamp from above.
    (a) Which item lets most light through?
    (b) Which item blocks all light?
    Answer:
    (a) _________________________
    (b) _________________________

20. Why do we say the Moon is not a source of light? Use what you know about light in your answer.
    Answer: