KS3 Science Revision

1. How many colour are in the colour spectrum?

2. What colour would a yellow pen appear in green light?

3. What does main focusing in your eye?

4. Where does the image appear in your eye?

5. If sound waves are very close together, what does it mean?

6. What vibrates first in our ear which allows us to hear?

7. After the ear drum vibrates, what happens next?

8. What is the normal?

9. Which way does light bend when going from a lesser to a more denser object?

10. Up to what frequency can humans hear to?
11. How do colour filter work?