Physics

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Across
  1. 4. Force between two objects that is due to their mass
  2. 7. A material which does not allow current to flow
  3. 10. The amount of matter in an object - it is measured in grams or kilograms
  4. 11. A completely empty space that contains no particles
  5. 12. A material which allows current to flow
  6. 13. Unit of electric current
  7. 15. Subatomic particle which carries negative charge
  8. 16. The size of the pull of gravity for a given mass
Down
  1. 1. When something moves back and forwards many times
  2. 2. When something hits a surface and 'bounces back' towards its source
  3. 3. To transfer (energy) in a wasteful way
  4. 5. The substance a sound wave travels through
  5. 6. A device for measuring current
  6. 8. Unit of force
  7. 9. A flow of electric charge
  8. 14. A reflected sound