2A- Kaiya McGhee

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Across
  1. 4. the largest source of carbon
  2. 5. the form of nitrogen commonly used by plants.
  3. 7. the first level in the atmosphere.
  4. 9. the 4th level of the atmosphere where you can see the
  5. 13. the sphere that mainly consists of everything natural and lifeless on Earth's surface such as rocks, sediments, and plants.
  6. 14. the breakdown of plants and animals.
  7. 15. the air that surrounds the Earth, mostly made up of nitrogen.
  8. 19. dissolved nitrite can be returned to the atmosphere by certain bacteria through this process.
  9. 20. water stored under the surface of the Earth.
Down
  1. 1. the third level in the atmosphere (where meteors show up).
  2. 2. 97% of Earth is made up of this.
  3. 3. all of the waters on Earth's surface.
  4. 6. all living organisms on Earth.
  5. 8. second level of the atmosphere(
  6. 10. 3% of Earth is made up of this.
  7. 11. breaks down different forms and changes them into new ways plants and animals can use.
  8. 12. this cycle occurs due to gravity and erosion.
  9. 16. the 5th level of the atmosphere, farthest from us.
  10. 17. the cycle relies on gravity and sun to give us precipitation and can be found in 3 different states of matter.
  11. 18. the element that plants and animals need to produce proteins, amino acids, and dna structures.