Science Puzzle

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Across
  1. 8. movement energy
  2. 10. small living thing
  3. 11. °
  4. 13. can't be broken down chemically into some simpler
  5. 15. lithospheres meet
  6. 17. 80°
  7. 18. make us stay on earth
  8. 19. most important part of a cell
  9. 20. not alive
Down
  1. 1. alive
  2. 2. circle
  3. 3. how much matter is in a amount of volume
  4. 4. top part of inside earth
  5. 5. almost movement energy
  6. 6. you get this from eating food
  7. 7. solid precipitation reaction
  8. 9. 🏃
  9. 12. Any of various opaque, fusible, ductile, and typically lustrous substances
  10. 14. all of a place
  11. 16. get energy from