Earth's Atmosphere

Edit Answers
1234567891011121314151617181920
Across
  1. 5. Process where bacteria convert nitrate (a form of nitrogen) into gaseous nitrogen
  2. 9. Colored lights in the atmosphere close to the North Pole
  3. 11. Only atmosphere layer with life
  4. 14. Gas that is almost 80% of the gases in the atmosphere
  5. 15. Radiation with longer wavelengths and seen as warmth
  6. 16. Atmosphere layer farthest from the Earth
  7. 17. Force that pulls all objects to the Earth
  8. 18. Vents on the seafloor that release hot, mineral-rich fluids
  9. 20. Rain
Down
  1. 1. Step in the nitrogen cycle where ammonium is converted to nitrate
  2. 2. Element that is found in all organic matter
  3. 3. Heat from the sun turns snow directly into water vapor
  4. 4. Atmosphere layer that protects the earth from ultraviolet rays
  5. 6. Mnemonic device to help remember the elements essential for life
  6. 7. Energy from the sun reaches the Earth through ___
  7. 8. Natural or artificial reservoir that absorbs and stores atmospheric carbon dioxide
  8. 10. Oxygen ___ as you move to higher altitudes
  9. 12. Process by which plants use sunlight to convert carbon dioxide and water into glucose
  10. 13. Light that will burn skin
  11. 19. Absorbs the energy from sunlight