forces, motion, friction machines

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Across
  1. 4. If you hold a ball in your hand it has __energy
  2. 5. A knife is and example of a _______.
  3. 8. A water slide has less ___ than a normal slide.
  4. 9. A see saw is an example of a ________.
  5. 12. A light changes ___ energy to light energy.
Down
  1. 1. levers, wedges and screws are_______ machines.
  2. 2. This measures how fast something is moving.
  3. 3. This can change the motion of an object.
  4. 6. If a books falls to the ground, _ does the work
  5. 7. A moving object has ______ energy.
  6. 10. This can change form.
  7. 11. rubbing hands together changes kinetic energy to ___