Science 4 · Unit 5: Light · Cambridge Primary Science Stage 4

Questions

1. 1. Complete the sentence: Sofia shines the ... down the tube.

   • flashlight
   • tube
   • mirror
   • lamp post
   Check

2. 2. Sofia shines a flashlight down a straight tube. Can Zara see the light at the other end?

   • Yes
   • No
   Check

3. 3. Complete the sentence: Sofia makes a ... in the tube, and this time Zara cannot see the light.

   • hole
   • bend
   • mark
   • knot
   Check

4. 4. Sofia makes a bend in the tube and shines the flashlight again. Can Zara see the light now?

   • Yes
   • No
   Check

5. 5. What does the bent tube experiment show?

   • Light travels in straight lines.
   • Light can bend around corners.
   • Light only travels through plastic.
   • Light travels in circles.
   Check

6. 6. Arun is looking at a palm tree. Identify the source of light.

   • the Sun
   • Arun's eyes
   • the ground
   • the palm tree
   Check

7. 7. In the ray diagram, the ray from the Sun to the palm tree is the ... ray.

   • arriving
   • reflected
   Check

8. 8. In the ray diagram, the ray from the palm tree to Arun's eye is the ... ray.

   • arriving
   • reflected
   Check

9. 9. Rabah and Khalid walk down a corridor lit by lamps in the ceiling. What is the source of light?

   • Khalid
   • the lamps in the ceiling
   • Rabah's eyes
   • the floor
   Check

10. 10. How does Rabah see Khalid?

    • Light shines on Khalid, reflects off him and travels into Rabah's eyes.
    • Light travels from Rabah's eyes to Khalid.
    • Khalid gives out his own light.
    • Light from Khalid goes up to the lamps.
    Check

11. 11. Why can't Rabah see Khalid after Khalid turns the corner?

    • Light travels in straight lines, so it can't bend round the corner to Rabah.
    • There is no light round the corner.
    • Khalid is too far away.
    • Rabah closed his eyes.
    Check

12. 12. When you draw how Mrs Liong sees her needle, where does the arriving ray go?

    • from the lamp to the needle
    • from her eye to the needle
    • from the needle to the lamp
    • from her eye to the lamp
    Check

13. 13. When you draw how Mrs Liong sees her needle, where does the reflected ray go?

    • from the needle to her eye
    • from her eye to the needle
    • from the lamp to the needle
    • from the lamp to her eye
    Check

14. 14. Marcus is under a table and can't see the can on top. What can he use to see it?

    • a sheet of paper
    • a mirror
    • a wooden board
    • a flashlight
    Check

15. 15. How does the mirror let Marcus see the can?

    • The mirror gives out light onto the can.
    • The mirror bends light round the table.
    • Light reflects off the can to the mirror, then off the mirror into his eyes.
    • Light goes from Marcus's eyes to the can.
    Check