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Energy
energy chapter 9
| Question | Answer |
|---|---|
| energy rich substance formed from the remains of once living organisms | fossil fuels |
| a solid fossil fuel formed from plant remains | coal |
| another name for oil | petroleum |
| wood, leaves, and manure are examples of this type of energy | biomass |
| what is the most widely used source of nonrenewable energy in the world today | coal |
| energy from the sun | solar |
| intense heat from Earth's interior | geothermal |
| central core of an atom that contains protons and neutrons | nucleus |
| splitting of an atom's nucleus into two smaller nuclei | fission |
| the combining of two atomic nuclei to produce a single larger nucleus | fusion |
| percentage of energy from a fuel that is actually used to perform work | efficiency |
| layer of material that helps block the transfer of heat between the air inside and air outside the building | insulation |
| reducing energy use | conservation |
| energy from sources that cannot be used up | renewable |
| energy produced from atoms | nuclear |
| electricity produced using energy of flowing water | hydroelectric |
| wind is an indirect source of this energy | solar |
| the fossil fuel that is present in the largest amount in the U.S. | coal |