1. What percent of Earth's water is useable fresh water for humans?

2. When water lands on the average piece of ground, what happens to the water?

3. Worldwide, most water is used by what sector for human use? Which are second most and third most?

4. Define the following terms: zone of aeration, zone of saturation, water table, aquifer, recharge area, discharge area, ground water mining.

5. What two things did I mention in class that should not be done to the recharge area of an aquifer?

6. What are the problems associated with overpumping groundwater?

7. What is the difference between point sources and nonpoint sources of pollution?

8. What are the three major types (stages) of wastewater treatment?

9. How does the Roger Road Wastewater Treatment Plant do each of those three?

10. Trace the path sewage takes through the Roger Road Wastewater Treatment Plant and beyond. Include a description of what occurs at each step and what happens to the products at each step. Be sure to follow both the water and the solids.