Science 3 · Unit 3: Light and shadows · Cambridge Primary Science Stage 3

Questions

1. 1. What does translucent mean?

   • It lets some light through but scatters it.
   • It lets all light through clearly.
   • It makes its own light.
   • It blocks all light.
   Check

2. 2. How can glass be made translucent?

   • by painting it black
   • by cleaning it
   • by making it thinner
   • by frosting or patterning it
   Check

3. 3. Can you read writing through a translucent material?

   • No, the light is scattered.
   • Yes, very clearly.
   • Yes, it makes it bigger.
   • No, it is completely black.
   Check

4. 4. Why do bathrooms often have translucent glass?

   • It blocks all light.
   • It is cheaper than walls.
   • It lets light in but people can't see in clearly.
   • It makes the room darker.
   Check

5. 5. Why has the dentist put translucent glass in her window?

   • so everyone can see in
   • to let light in while keeping patients private
   • to make shadows
   • to keep the room dark
   Check

6. 6. Why do people put translucent shades on bright light bulbs?

   • to make the bulb hotter
   • to make it a light source
   • The light is softer and doesn't glare in their eyes.
   • to make the room completely dark
   Check

7. 7. Why does an Emergency sign have translucent glass with a bright lamp behind it?

   • So the glass won't break.
   • So the letters stick to it.
   • It keeps the sign cool.
   • It makes the sign bright, but keeps the lamp's glare out of our eyes.
   Check

8. 8. Zara's shadow theatre screen is made of greaseproof paper. Why?

   • It is translucent, so shadows show on it.
   • It makes light.
   • It is opaque, so it blocks all light.
   • It is transparent, so there are no shadows.
   Check

9. 9. A material scatters the light from a flashlight. What is it?

   • a light source
   • opaque
   • transparent
   • translucent
   Check

10. 10. Which is the right order from blocking the most light to the least?

    • opaque, translucent, transparent
    • transparent, translucent, opaque
    • transparent, opaque, translucent
    • translucent, opaque, transparent
    Check

11. 11. Sofia can read words through clear plastic. What is the plastic?

    • opaque
    • a light source
    • transparent
    • translucent
    Check

12. 12. A friend says 'Translucent materials are a source of light.' Is that right?

    • Yes
    • No
    Check

13. 13. Why might people put translucent glass in their front door?

    • so everyone can see in
    • to let light into the hall without people seeing in
    • to make the door stronger
    • to keep the hall completely dark
    Check

14. 14. Why must you be careful using glass in an investigation?

    • Glass makes shadows.
    • Glass is a gas.
    • Glass is very hot.
    • Glass can smash and the sharp bits may cut you.
    Check