| A | B |
|---|
| gasohol | fuel made from gasline and alcohol |
| smog | produced when sunlight acts on automobile exhaust |
| recycling | using newspapers to form new paper |
| coal | solid fossil fuel |
| solar energy | energy from the sun |
| renewable resource | examples are trees and fresh water |
| strip mining | the method used to extract shallow deposits of coal |
| wind energy | created because the sun heats air unevenly |
| acid precipitation | rain or snow that contains a high amount of sulfuric acid |
| nonrenewable resources | examples are oil and natural gas |
| hydroelectric energy | created by falling water |
| energy resource | a natural resource that people use to make energy |
| biomass | the term for organic matter that contains stored energy |
| fossil fuels | formed from once living organisms |
| natural gas | gaseous fossil fuel used to generate electricity |
| nuclear energy | comes from the nucleii of atoms |
| natural resource | an organism, energy form, or natural substance used by living things |
| petroleum | substance that gasoline, jet fuel, and diesel fuel are made |
| geothermal energy | energy from the earth's crust |
| alternative energy | an energy resource other than fossil fuel |
