Energy sources

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Across
  1. 4. mass
  2. 6. close together
  3. 8. hotness,coldness
  4. 9. relationship to energy when work is done
  5. 12. traveling heat
  6. 13. transfer of currents
  7. 16. temperature
  8. 20. stable object
Down
  1. 1. blocker
  2. 2. position an object has
  3. 3. physical substance
  4. 5. Kinetic energy
  5. 7. heat being transferred to an object
  6. 10. motion
  7. 11. way things work together
  8. 14. portion of matter
  9. 15. to move to another object
  10. 17. chemical resources
  11. 18. sample of matter
  12. 19. freely moving substance