Science crossword puzzle

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Across
  1. 2. changing the path of light
  2. 6. it is in rotation with the sun
  3. 8. the air we breath
  4. 10. everything is backwards
  5. 11. takes 24 hours
  6. 12. system the whole place
  7. 13. energy you can hear it
  8. 14. you can see them the most at night
  9. 15. it comes up at night
Down
  1. 1. we live on it
  2. 3. bodies of water
  3. 4. it gives us heat and light
  4. 5. energy it lets you see in dark
  5. 6. water coming in all different forms
  6. 7. energy it makes you hot
  7. 9. takes 365 days