1. Cycling of Matter in Ecosystems

2. Sustaining Life on Earth
KEY IDEA:
Remember energy and
matter can not be created
or destroyed.

3. Matter in your Body All organisms need water and nutrients.
Water and nutrients are made up of matter.
Your body gets matter from food, water and air.
This matter does not stay in your body forever!
It is replaced over time.

4. Cycles of Matter Biogeochemical cycles
Movement of matter through the biotic and abiotic parts of an ecosystem.

5. Types of Biogeochemical Cycles

6. The Water Cycle
The series of processes that moves water through the environment.
Liquid water evaporates
Vapour condenses into ice crystals or water droplets
Droplets collect to form clouds
Water returns to Earth as precipitation.

7. The Water Cycle
NASA Water Cycle Video
Water cycle song

8. The Carbon Cycle
The series of processes that moves carbon compounds through an ecosystem.
Carbon dioxide is used by plants to make sugar
Photosynthesis
Animals eat plants to obtain energy and the carbon compounds.
Cellular respiration

9. Earth has Carbon Deposits
Fossil fuels
Coal
Oil
Natural gas
Minerals
Limestone
Shells of marine animals

10. The Carbon Cycle
NASA Carbon Cycle
Fig. 4-29, p. 78

11. The Carbon Cycle (Marine)
Fig. 4-29, p. 78

12. The Nitrogen Cycle
Fig p. 80

13. Questions!