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Science
UNIT 4
| Question | Answer |
|---|---|
| Renewable resource | Can be replaced within the human life span |
| solar energy | radient energy emitted by the sun |
| biomass fuels | renewable resource |
| geothermal energy | heat energy |
| nonrenewable resource | Can not be replaced within the human life span |
| fossil fuels | a hydrocarbon deposit such as petroleum, coal or natural gas |
| solar thermal system | technology that uses the sun's energy |
| photovoltaic system | solar power system |
| passive solar system | use of the sun's energy for heating and cooling living spaces |