Across
- 3. what happens to the particles in a liquid or a gas when you heat them
- 5. is the distance between two identical points on a wave
- 8. is the maximum distance of the wave from the rest position
- 10. bounces back against a medium
- 11. spread light rays and make objects look smaller
- 12. requires particles to travel
- 13. is the bottom of the wave
Down
- 1. animals that create their own light
- 2. focus light rays to one point and magnify them
- 4. when you heat a metal strip at one end, the heat travels to the other end
- 6. things that create their own light
- 7. bends through a medium
- 9. is the top of the wave