Science

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