What is Photovoltaic Energy?
How does a photovoltaic (PV) cell work? (6) What is the most common form of renewable energy used to generate electricity? What percentage of U.S. electricity generation comes from this source? (7) Hydroelectric energy can be generated through a run-of-the-river system and through a storage system. Describe each system. Run-of-the-river system: Storage system: (8) What causes wind? How does the process reverse itself between day and night? (9) How does a windmill work? (10) How do engineers use the earth’s heat to create geothermal energy? (11) Biomass involves burning organic materials to release chemical energy. What are the steps in the Carbon Cycle that describe this process? (12) How did petroleum and natural gas form? (13) What is “crude oil” and how is it brought to the surface of the earth? (14) What are 10 different petroleum products that come from “crude oil”? • 1. • 2. • 3. • 4. • 5. • 6. • 7. • 8. • 9. • 10. (15) How did coal form? (16) Name and describe 4 major uses for c