| A | B |
|---|
| biomass | once-living things that have been burned to generate heat |
| conductor | any material through which electricity can flow |
| generator | a device that converts mechanical energy into electric energy |
| geothermal energy | energy from deep within the Earth's crust |
| hydrocarbons | molecules that are made up of hydrogen and carbon that release energy when burned |
| turbine | rotating blades that help convert other forms of energy into mechanical enery |
| hydroelectric energy | electric energy produced by falling water |
| solar energy | energy from the sun |
| transformer | a device for increasing and decreasing electric voltage |
| wind turbine | a modern windmill |
| voltage | potential energy of electricity |
