1. Ethanol
construction designed to take advantage of solar radiation without active technology

2. Passive Solar
A device with blades that can be turned by water, wind or steam to power a generator

3. Turbine
Heat energy from the sun is transferred to water which can be circulated to heat a building or a pool

4. Solar Water Heating System
Energy generated by the kinetic energy of moving water

5. Hydroelectricity
A diesel substitute produced by extracting and chemically altering oil from plants

6. Biodiesel
A property of a building material that allows it to maintain heat or cold

7. Thermal Mass
Design that decreases the amount of energy needed to do the same amount of work

8. Efficiency
Heat energy that comes from the natural radioactive decay of elements deep within the earth

9. The greatest quantity of energy used at any one time
Geothermal Energy
The greatest quantity of energy used at any one time

10. Finding and implementing ways to use less energy
Peak Demand
Finding and implementing ways to use less energy

11. Energy Conservation
Large-scale application of solar; uses lenses, mirrors and tracking systems to focus sunlight

12. Solar Thermal Power Plants
The accumulation of sediments, primarily silt, on the bottom of a reservoir

13. Siltation
An efficient, self-regulating electricity distribution network that accepts any source of electricity and distributes it

14. Energy captured from sunlight with advanced technology
Smart Grid
Energy captured from sunlight with advanced technology

15. Active Solar
Application of an electrical current to split water molecules into hydrogen and oxygen

16. The storage of water in a reservoir behind a dam
Electrolysis
The storage of water in a reservoir behind a dam

17. A vehicle that can run on gasoline or a gasoline-ethanol mixture
Water Impoundment
A vehicle that can run on gasoline or a gasoline-ethanol mixture

18. Energy generated from the kinetic energy of moving wind
Flex-Fuel Vehicle
Energy generated from the kinetic energy of moving wind

19. Another term used to describe a non-renewable resource
Wind Energy
Another term used to describe a non-renewable resource

20. Carbon found in biomass that was recently in the atmosphere
Depletable Resources
Carbon found in biomass that was recently in the atmosphere

21. Energy source with a finite supply; nuclear and fossil fuels
Modern Carbon
Energy source with a finite supply; nuclear and fossil fuels

22. Wood, charcoal, animal manure and algae
Nonrenewable energy
Wood, charcoal, animal manure and algae

23. Solid biofuel
Hydroelectricity generation in which water is retained behind a low dam or no dam

24. Run of the River
A system of capturing energy from sun light and converting it directly into electricity

25. Photovoltaic cells
Chemical reaction resulting in opposing movement of protons and electrons to create an electrical current

26. An energy source that cannot be used up
Hydrogen Fuel Cells
An energy source that cannot be used up

27. Nondepletable Resource
An activity that does not change carbon dioxide levels in the atmosphere

28. Carbon captured in fossils- “old carbon”
Carbon Neutral
Carbon captured in fossils- “old carbon”

29. Fossil Carbon Ethanol and biodiesel
Ethanol and biodiesel

30. Liquid Biofuel
Billing system that charges consumers a higher price for electricity as the usage increases

31. Tiered Rate System
Nondepletable energy source- relies on the gravitational pull of the moon

32. Tidal Energy
An energy source that can be regenerated indefinitely as long as it is not overharvested

33. Potentially Renewable
Energy source made by converting plant material into alcohol