Science puzzle

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Across
  1. 3. you test thing in it
  2. 5. it starts with a bioc
  3. 8. scientific study of volcanoes
  4. 10. it is the ground
  5. 12. you watch it
  6. 14. "we get the worst __________."
  7. 15. there is the word sear
Down
  1. 1. This is in sunscreen
  2. 2. astroph
  3. 4. gas, soild and?
  4. 6. scientific study of the behavior and animal life
  5. 7. fossils, animals and plants
  6. 9. branch of science concerned
  7. 11. this you ;)
  8. 13. you can see the stars