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natural resources
anything occuring naturally in the environment that humans use (air, water, soil, sunlight)
renewable resources
resources that can be reused or replenished (wood)
nonrenewable resources
resources that cannot be replaced (silver) - it takes a very long time for them to form
fossil fuels
coal, petroleum, and nature gas - are the energy-rich substances made from the preserved remains of an organism
sunlight
the energy stored in these compounds orginally arrived on Earth as this
coal
is formed from the remains of olants that dies long ago in and around swampy areas, used in water and air purification systems, used to make steel from iron ore
petroleum
another word for oil, made of the remains of small animals, algae, and other organisms that live in marine environments hundreds of millions of years ago, is liquid and is useful for powering engines in cars, trains, ships, and airplanes
natural gas
formed from the same processes that produce oil and found in the same locations natural gas is found
fracking
short for hydraulic fracturing that involves using pressured fluids to break layers of shale rock and force out the trapped natural gas
nuclear energy
provides 20% of the electricity in the US
nuclear fission
the splitting of an atom’s nucleus in 2 nuclei causing a great deal of energy to be released
uranium
the fuel used for nuclear fission inside nuclear reactors
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