Cycles on Earth (Ecology)

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Across
  1. 8. This process is known to increase the amount of CO2 on our planet.
  2. 11. Carbon is often taken from this molecule in order to create other organic compounds in the carbon cycle.
  3. 12. How much of Earth’s land area is occupied by jungles?
Down
  1. 1. Sometimes nitrogen gas can become ‘fixed’ through this process.
  2. 2. A process done by fungi in soil is used in order to make a lot of this product in the nitrogen cycle.
  3. 3. This process allows water to flow through soil/rock in order to create aquifers.
  4. 4. These tiny organisms are responsible for most of our oxygen supply on Earth.
  5. 5. When an excess of this is dumped into a body of water it can cause algae blooms.
  6. 6. Matter found in the carbon, nitrogen and water cycles is not destroyed but instead _____.
  7. 7. This is a compound that plants take up in order to build other nitrogen based compounds.
  8. 9. The water cycle is driven by heat from this.
  9. 10. In the water cycle, eventually all water ends up here.