Concentrations changeUnderstanding how and why is important to our understanding of climate change over time

Source – Mechanism that adds gasSink – Mechanism that removes gasCycle – The route of a gas entering and exiting

Hydrologic (Water)CarbonNitrogen

Let’s label these!

Need colored pencils

Sources = redSinks = green

Sources = redSinks = green

Sources = redSinks = green

1. Why is nitrogen needed?2. What must happen for nitrogen be usable?3. What is it called? (2 steps)

4. Why is there so much nitrogen in the atmosphere?

5. What would happen if there was too much nitrogen in the atmosphere?

1. Aerosol2. Source

3. Sink4. Cycle

5. Respiration6. Transpiration7. Carbon Sequestration

8. Nitrogen Fixation9. Nitrification10. Eutrophication