| Term | Definition |
| renewable resource | energy source such as solar energy that is replaced almost as quickly as it is used |
| photovoltaic cell | devise that converts solar energy into electricity |
| hydroelectricity | electricity produced from the energy of moving water |
| geothermal energy | thermal energy contained in hot magma can be converted by a power plant into electrical energy |
| biomass | renewable organic power matter from plants and animals such as wood and animal manure that can can be burned to heat water and produce electricity |