Science energy

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Across
  1. 4. firm and stable in shape
  2. 6. the ability to do work
  3. 8. a minute quantity or fragment
  4. 10. heat transfer through direct contact
  5. 11. a collection of elements that are organized
  6. 12. anything that takes up space
  7. 13. a state of matter that has no fixed shape
  8. 14. heat energy
  9. 17. energy in motion
  10. 18. heat transfer through empty space
Down
  1. 1. keeps things cool or hot
  2. 2. heat is transferred through a heated fluid
  3. 3. an occupation that someone does
  4. 5. how much mass there is in a particular space
  5. 7. to convey from one thing to another
  6. 8. stored energy
  7. 9. the measure of hotness and coldness
  8. 15. energy transferred from one body to another
  9. 16. take the shape of there container