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15.3 Chemistry

Vocabulary Words

nonrenewable energy resources a source of energy that exists in limited quantities and, once used, cannot be replaced except over the course of millions of years
fossil fuels rich deposits of hydrocarbons formed underground from the remains of once-living organisms
renewable energy resources a source of energy that can be replaced in a relatively short period of time
hydroelectric energy energy obtained from flowing water
solar energy sunlight that is converted into usable energy
geothermal energy thermal energy beneath Earth's surface
biomass energy the chemical energy stored in living things
hydrogen fuel cell a cell that generates electricity from a controlled reaction between hydrogen and oxygen
energy conservation the practice of finding ways to use less energy or to use energy more efficiently
Created by: MarieElyn