APES

5. energy energy sources that can be naturally replenished
9. efficiency using technology to perform the same task with less energy
12. a unit used to measure electricity consumption
14. energy a renewable energy source that uses sunlight to generate electricity
15. power a renewable energy source that uses flowing water and dams
18. a radioactive element used as fuel in nuclear reactors
19. gas a fossil fuel that burns cleaner than coal
20. energy an energy source that relies on moving air to produce electricity

1. energy an energy source that uses heat from Earth’s interior
2. dioxide the main greenhouse gas released from fossil fuel combustion
3. the process of splitting atoms to release energy in nuclear power plants
4. cells devices that convert sunlight directly into electricity
6. energy energy sources that cannot be replaced on a human timescale
7. conservation reducing overall energy use through behavior changes
8. a nonrenewable energy source commonly used for transportation
10. a method of extracting natural gas using high-pressure water and chemicals
11. material that reduces heat loss in buildings
13. a fuel made from organic material such as wood or crops
16. a nonrenewable fuel formed from ancient plants and used heavily for electricity
17. a device that converts kinetic energy into electrical energy