Science Crossword Puzzle

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Across
  1. 6. front where cold air is under warm air.
  2. 8. organelle found in plants and algae
  3. 11. lower layer of thermosphere.
  4. 12. control center of the cell.
  5. 14. water changed from liquid to gas.
  6. 16. outer layer of thermosphere.
  7. 17. front where warm air meets cold air.
  8. 18. evaporation of water leaves plants.
  9. 19. 3rd layer of Earths atmosphere.
  10. 20. gases that surround earth.
Down
  1. 1. 2nd layer of Earths atmosphere.
  2. 2. lowest layer of Earths atmosphere.
  3. 3. Cold sinking air that brings warm days.
  4. 4. water that falls from clouds to Earth.
  5. 5. Condition of Earth's atmosphere
  6. 7. 4th layer of Earths atmosphere.
  7. 9. boundary of air mass that doesn't move.
  8. 10. gas changes to liquid,forms clouds.
  9. 13. power house of the cell
  10. 15. Warm rising air that brings wet storms.