1. Water & Carbon Cycle Changes Over Time

2. Long term changes in water and carbon cycles
Objectives
To be able to explain long term (millions of years) changes in the water and carbon cycles, including changes to stores and flows.

3. How has the earth’s temperature change over the past 400,000 years?
What do you notice?
How would this impact on the water cycle?
Think about: precipitation, evapotranspiration and storage.

4. Long term changes in the water cycle

5. Long term changes the carbon cycle
What impact would glacial periods have on the carbon in the atmosphere?

6. Long term changes the carbon cycle
What do you notice?
What could be the reasons for this?

7. Long-term changes in the water and carbon cycles
1) How has the global temperature of the earth fluctuated in the past 400,000 years? Include figures and years. 2) What impact have these changes had on the water cycle? Include stores and flows. 3a) What is the relationship with the change in temperature and the CO2 changes in the atmosphere? Include figures and years. b) What are the reasons for this relationship? c) What other changes occur in the stores and flows?

8. Plenary: It review question time!