1. POS Nutrient cycles and energy flow
Describe the process of cycling carbon and water through an ecosystem
Identify mechanisms by which pollutants enter and move through the environment, and can become concentrated in some organisms (acid rain, mercury, PCBs, DDT)

2. Materials Bromothymol blue Snails/jar Acid/base samples
Red + blue litmus paper, universal indicator paper

3. Telltale Snails Activity
Lab write up pg 50
Bromothymol blue + snails

4. Carbon/Water Cycles Acid Rain Bioaccumulation
Topic 5
Carbon/Water Cycles
Acid Rain
Bioaccumulation

5. Cycles in the environment
Carbon cycle
Water cycle
These two natural cycles are also affected by human activity. We offset the balance of CO2 levels (global warming) as well as increase the distribution of pollutants via the water cycle (acid rain, bioaccumulation) around the globe.

6. http://www. biology. ualberta
new pic cycles for ppt

7. The Carbon Cycle

8. The Water Cycle

10. What happens when the two cycles collide?

14. Assignment
Draw a combined water and carbon cycle diagram *see exemplars
Terms:
Water Cycle: Transpiration, evaporation, condensation, precipitation, groundwater, runoff
Carbon Cycle: dissolved carbon dioxide, decomposition, volcanic activity, forest fires, cellular respiration, photosynthesis, fossil fuel combustion
Acid rain
*use different colored arrows