Unit C

3. Solar photovoltaic energy relies on chemical _____________.
5. _______ digesters produce methane from biomass
8. harnesses the motion of the ocean
10. Oscillating water columns are _________ devices that generate electricity as water flows in and out.
11. Wind turbine blades are connected directly to the __________.
13. Wind farms do not create any ___________ gases
16. Where tidal barrages are often built
18. Solar cells produce electricity which must be __________ to AC in order to be useful.
19. Abbreviation for city garbage

1. Biomass co-firing plants combine the use of biomass fuel materials with the use of _______________.
2. The use of renewable and alternative power generation sources is designed to reduce______________ impact.
4. Rotting garbage and agricultural and human ___________ release methane gas.
6. Most solar power plants are tied to the electrical ______.
7. _____________ conversion of biomass include pyrolysis, gasification and combustion.
9. In geothermal energy, water beneath the earth's surface becomes _________________.
12. Corn and sugar can be _______ to produce fuel.
14. Wind is caused by atmospheric pressure difference from the uneven___________ of the earth's surface.
15. Burning wood is an example of using _________ for energy.
17. One million watts