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Energy Sources
Do Now: ● What are all of the possible sources we can
get energy from?What are the pros and cons of each?
● What is renewable vs. nonrenewable?
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Objectives:
● Distinguish between renewable and nonrenewable resources.
● Explain pros and cons of various energy sources.
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What are Resources:
● Renewable resources are resources that can be replaced such as trees, water, etc.
● Nonrenewable resources cannot be replaced such as minerals (coal)
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Fossil Fuels - nonrenewable
● Non-renewable - we cannot replace them, when they are gone they are gone forever
● made from organic (living) organism that have changed over timeo coalo oilo natural gas
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Nonrenewable Information
What are they?
http://www.eschooltoday.com/energy/non-renewable-energy/what-is-non-renewable-energy.html
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Renewable Energy Overview
What are they?
http://www.eschooltoday.com/energy/renewable-energy/what-is-renewable-energy.html
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Geothermal Energy - renewable
● Heated water from under the earth creates steam
● Pipes take the heated water, steam, to a turbine
● Steam powers the turbine to spin creating energy
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Geothermal Energy ~ cost/benefits
● Could supply 10% total needed energy● Small carbon footprint● Minimal waste products
o some waste can be used such as sulfuro waste water recycled back into earth to be reheated
and used for power
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Nuclear Energy - renewable
● Nuclear fission is the process where the nucleus (hence 'nuclear' energy) of a 'heavy', fissionable atom is split. Enormous amounts of energy are released in this process.
● This energy, in the form of heat, is transferred to steam turbines to generate electricity.
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Nuclear Energy - cost/benefit
● radioactive material can be released if overheat, natural disaster, etc.
● low carbon footprint, very clean energy
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Hydropower - renewable
● hydropower accounted for roughly half of the nation’s renewable-generated electricity in 2013
● water enters the facility and turns a turbine
● that spins the generator and creates energy
● http://energy.gov/search/site/hydropower?gid=429943
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Video
Hydropower
Graphic - How it Works
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Solar Energy - renewable● The curved mirrors are tilted toward the sun,
focusing sunlight on tubes that run the length of the mirrors.
● The reflected sunlight heats a fluid flowing through the tubes.
● The hot fluid then is used to boil water in a conventional steam-turbine generator to produce electricity.
● http://energy.gov/articles/top-6-things-you-didnt-know-about-solar-energy
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Wind Energy - renewable
● The energy in the wind turns two or three propeller-like blades around a rotor.
● The rotor is connected to the main shaft, which spins a generator to create electricity.
● http://energy.gov/eere/inside-wind-turbine
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Video
Wind Turbines 3:17
Slideshow● Look at how large they really are.
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Biofuel Energy - renewable● may also hear it called biomass energy/fuel ● organic renewable energy source that
includes materials such as agriculture and forest residues, energy crops, and algaeo composted materials - corn cobs, egg shells, etc.
● still working on making this more efficient