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Unit 7 6th Grade
Energy Use and Renewal
Question | Answer |
---|---|
renewable resources | materials from the environment that people use that can be replaced relatively quickly |
nonrenewable resources | materials from the environment that people use that cannot be replaced |
inexhaustible resources | an energy source that cannot be used up |
fossil fuels | a fuel formed from the decay of ancient forms of life (oil, coal, petroleum, natural gas-methane, propane, butane) |
alternative energy source | a source of energy other than the burning of a fossil fuel |
nuclear energy | energy contained in the nucleus of an atom |
geothermal energy | heat from below Earth's surface |
hydroelectricity | electricity generated by running water |
pollution | a harmful change to the environment |
smog | a mixture of smoke and fog, formed when smoke and fumes collect in moist, calm air |
acid rain | acid that is formed when the sulfur and nitrogen gases produced by burning fossil fuels combine with water vapor in the air then fall Earth as rain |
thermal pollution | the addition of warm water into a stream or lake that is normally cold |
monetary costs | the cash value of energy use; examples include the cost of heating a home or the large amount of money used to clean up an oil spill |
nonmonetary costs | the environmental consequence of energy use; examples include the generation of pollution and long-term health problems caused for people |
cost-effectiveness | a measure determined by comparing the costs and the consequences of different ways of doing something |
conservation | saving, protecting, or using natural resources wisely |
biomass | resource that comes from living, or recently living organisms |
hydrogen fuel | hydrogen gas burned as an energy source |
reduce | to use less of something |
reuse | to use something again |
recycle | to make new objects or materials from old objects or materials |
solar energy | inexhaustible supply of energy from the Sun |
wind energy | inexhaustible supply of energy from the atmosphere's moving air (powered by the Sun) |