nonrenewable sources - resources that formed over 300 million years ago that cannot be remade, renewable sources - sources that can be replaced quickly or constantly through earth's cycles, fossil fuels - coal, petroleum oil, natural gas, coal - fossil fuel created by ancient plant life, oil and natural gas - fossil fuel created by ancient sea creatures, biomass energy - plant matter that can be replanted and regrown, solar energy - radiant energy from the sun that can be captured in solar panels to create electricity, hydroelectric power - energy from moving water than can mechanically turn the turbine to spin the generation of electricity, geothermal energy - thermal energy from the core of the earth that creates steam, wind energy - mechanical energy from blowing wind, hydro - water, geo - earth, ethanol - liquid fuel made from corn crops, petroleum - oil,

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