Physics for 7th grade

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Across
  1. 4. A unit to measure the intensity of sound.
  2. 6. Red, green and blue are _____ colors.
  3. 7. A push or pull on an object.
  4. 9. The maximum height of a wave from its rest position.
  5. 13. The bouncing back of light waves from a surface.
  6. 14. The force of gravity acting on an object's mass.
  7. 15. The amount of matter in an object.
  8. 16. Two different magnetic poles ________ .
  9. 17. A change in position of an object.
Down
  1. 1. The bending of light as it passes through a medium.
  2. 2. Another name of thermal energy.
  3. 3. A measure of how hot or cold something is.
  4. 5. Vibrations that made by drum.
  5. 8. Force over area
  6. 10. The force of attraction or repulsion between magnets.
  7. 11. A transparent object that separates light into different colors.
  8. 12. Energy of moving objects