Chapter 8 section 3

renewable resource
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Terms in this set (13)
renewable resource
an energy source that is replaced by natural processes as quickly as human use it
list the 5 main types of renewable energy resources
wind
solar
hydroelectric
geothermal
biomass
today only about _____ of the energy in the U.S. is produce d using solar energy
3%
solar cells are only ____________ percent efficient
15-20
gravitational potential energy of water can be increased using a dam. the water falls through a ___________ it then turns a _______________ which produces the electricity
turbine, generator
today hydroelectric power plants provide _______% of U.S. electric needs
7.4
hydroelectric power plants are twice as efficient of fossil fuel power plants why?
less energy changes
wind turbines use the wind to turn the windmill which is connected to an electric __________ that produces energy
generator
today wind turbines are ________% efficient
30-35
geothermal heat is the thermal energy that is created by the decay of unstable ________________ in the core of the earth converting ____________ energy in to thermal energy, this thermal energy is transferred from the core to the earth's crust and the mantle making some rock melt into __________
radioactive elements, nuclear, magma
_____________% efficient at producing electricity12-20Biomass power plants burn __________ organic matter such as wood, sugarcane fibers, rice hulls, animal mature to produce _________ energy which is used to turn water into ________ which is used to turn a __________ which turns a _____________to produce ______________renewable, thermal, steam, turbine, generator, electricityefficiency of bimass of a power plant20%