ch 15 sec 3
TRANSCRIPT
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CH 15 Sec 3
Energy Resources
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Natural Resources
• Needs that are provided by nature• 2 types
–Renewable – nature replaces or replenishes them
• Solar, wind, hydro
–Nonrenewable – limited supply• Oil, coal
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Renewable Energy sources
• Water – Hydroelectric, rivers, waterfalls, dams (need to be near
water)
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Renewable Energy sources
• Geothermal – heat from the earth (need to be near
hotspots)
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Renewable Energy sources
• Solar – energy from the suns rays (capture, clouds, night)
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Renewable Energy sources
• Wind – Wind energy pushes turbines (need many
turbines for a little energy, consistently windy areas)
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Other renewable resources
• Biomass – chemical energy stored in living things
• Hydrogen fuel cell – creates energy by reacting hydrogen and oxygen
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Nonrenewable energy sources
• Oil, coal, natural gas
• Likely to run out in our lifetime
• Creates pollution
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Air Pollution
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Fossil Fuels
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Nonrenewable energy sources
• Nuclear Energy• Create heat by
splitting Uranium atoms
• + clean, cheap, efficient
• - dangerous, uranium is limited, but plentiful
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Conserving Energy Resources
• Reduce energy needs and increasing energy efficiency
• Problems – convenience and initial cost