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6th grade energy resources Answer Key

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General Knowledge - energy sources
#1 Common reservoir rock in which petroleum is found Sandstone
#2 Name two indirect solar energy sources Hydroelectric, Wind (will also accept fossil fuels)
#3 What are the three fossil fuels Coal, petroleum (oil), natural gas
#4 What is the source for nuclear energy Uranium
#5 Petroleum forms from what original material Dead animal matter, usually marine animals
Electricity
#1 What happens to electrons when electricity is used - they are destroyed, trapped, created or move through? Move Through
#2 Which form of electricity has a steady flow of electrons - static or current electricity current
#3 What is the basic process of creating electricity in a power plant (name at least four steps in order) Burn fossil fuels - heat creates steam - steam turns turbine - turbine turns rod - rod turns coils - nearby magnet moves electrons -
#4 A closed 'loop' through which electricity travels - needed to light a lightbulb for example A circuit
#5 No Question for 5
Energy
#1 What are four FORMS of energy Electrical, heat, light, Kinetic (mechanical), chemical
#2 What is a renewable resource A resource that can be replaced or renewed as quickly as they are used
#3 What are the coal stages from least carbon content (and energy), to highest (do not count peat) Lignite, bituminous, anthracite
#4 What is the main use of petroleum in the US Transportation
#5 What material is needed for coal to form Plant remains
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Final Question
Why did coal, petroleum and natural gas become known as 'fossil fuels' - how does the name describe the fuels? Because they take extremely long times to form, like fossils do, and they need to be dug or mined for, like fossils do.