science

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Across
  1. 1. a reflection of sound
  2. 6. light that changes the direction or bends
  3. 8. let's light past through
  4. 9. Is a form of energy produced by VIBRATION
  5. 10. a steam of light pointed in one direction
  6. 11. a length between the compression in a sound wave
  7. 12. movement
Down
  1. 2. a curved lens like the inside of a sphere
  2. 3. a thing that moves back and forth
  3. 4. unite of measure of an frequency
  4. 5. a thing that reaches the ear
  5. 7. light bounces off an object.