1. Topic 7 Ecology- Chemistry of the Environment

2. Ecology
Interaction of organisms with the environment

3. Biotic Abiotic Living factors in the environment
Plants, animals, bacteria
Non-living factors in the environment
Sunlight, temperature, water, soil, pH, weather

4. Ecosystem
Organisms interacting with their non-living environment

5. Abiotic Factors

6. Reusing & Recycling
Ecosystems must keep a balance in order to sustain itself

7. Water Cycle Produced during Cellular Respiration
Needed for Photosynthesis
Evaporation & Transpiration
Condensation Precipitation

9. C,H,O Cycles
CO2 produced during cellular respiration, needed for photosynthesis
O2 produced during photosynthesis, needed for cellular respiration

11. Nitrogen Cycle
Nitrogen fixation- certain bacteria can turn N2 into a usable form
Plants absorb nitrogen from soil
Animals eat plants
Nitrogen leaves animals bodies through urine & feces
Also, nitrogen enters soil when an animal dies and decays