Three Ecosystem Cycles: Water, Carbon, Nitrogen

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Across
  1. 2. Carbon ___________: carbon as it is found in the air, in a gas form
  2. 3. Water rises up into the sky, moves through the air, and comes back down to Earth in a never-ending ___________
  3. 5. When animals and plants __________, carbon from their bodies enters the Earth's crust
  4. 8. Water turns from a liquid form into a gas form when it is heated
  5. 12. Water that flows downhill on Earth's surface into rivers, lakes, and oceans
  6. 13. This comes form car exhausts and can tons of extra nitrogen to the environment
  7. 14. The tiny droplets of water that collect together in the atmosphere form _____________
  8. 15. When water evaporates from plants, it is called ________________
  9. 17. The process in which plants soak up carbon dioxide
  10. 21. ______________ effect: the warming of the atmosphere due to certain gases
  11. 24. The water that's underground in the soil
  12. 25. When water vapor cools high in the atmosphere it turns back into tiny liquid drops of liquid water
Down
  1. 1. Nitrogen makes it way to the ground through rain, snow, hail, sleet. This is known as _________________
  2. 4. An imbalance in the nitrogen cycle caused by human activities can negatively impact the ________________
  3. 6. A force that pulls water downward to the surface of the Earth and even into the ground
  4. 7. We cannot simply breathe nitrogen in, therefore we must get it from ____________
  5. 9. There is more of this gas than oxygen and carbon dioxide in the atmosphere
  6. 10. When gravity pulls the drops of water in clouds back to Earth in the form of rain, snow, sleet, hail
  7. 11. A substance that is the 4th most common element in the universe
  8. 16. Water that is turned into a gas is known as water ____________
  9. 18. Trees are known as carbon ___________ because they take so much carbon dioxide out of the atmosphere
  10. 19. Only about 3% of all the water on Earth is _____________
  11. 20. Most of the water on planet Earth can be found here
  12. 22. Global Too much carbon dioxide in the atmosphere has increased temperatures worldwide. This is known as global _____________
  13. 23. Lately, carbon dioxide levels on planet Earth have been _________________