Hayleighs puzzle

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Across
  1. 3. causes objects to be attracted to each other because they have mass
  2. 5. the sun is the biggest source
  3. 6. cannot be created nor destroyed
  4. 7. the speed of an object in a specific direction
  5. 8. vibrations moving through something
  6. 13. It is greater in heavier objects.
  7. 14. the weight of an object
  8. 15. the energy of an object in motion
  9. 16. the energy contained within a system that is responsible for its temperature.
Down
  1. 1. energy that can be altered from one form to another.
  2. 2. something that puts out light
  3. 4. refers to the stored energy within an object
  4. 9. able to stretch and return to its original form
  5. 10. the energy released during nuclear fission or fusion
  6. 11. the energy generated by the movement of electrons from one point to another
  7. 12. Energy stored in the bonds of chemical compounds.