Carbon Cycle Crossword

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Across
  1. 4. Carbon dioxide is a substance made of a carbon atom and two __________ atoms.
  2. 6. When burned, these provide energy and release carbon dioxide into the atmosphere.
  3. 8. A large farm where animals are kept
  4. 10. The gas produces when humans breathe.
  5. 12. When fossil fuels are burned, carbon is released into the __________.
  6. 13. Animals breathe using a process called __________.
Down
  1. 1. A type of fossil fuels
  2. 2. Able to be maintained over time because methods used do not hurt the environment.
  3. 3. This element is found in all living things.
  4. 5. The type of environment (biome) where cattle graze.
  5. 7. The process in which plants make their own food.
  6. 9. oil and natural gas are examples.
  7. 11. Cows produce large amounts of this gas as they digest food.