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ENERGY SOURCES

ENERGY SOURCES. SOL 6.2 b, c, d. There are many important _______ _______ on Earth. energy sources. Our _____ is responsible for creating most of them. SUN. Energy cannot be created or destroyed . Energy Transformation. Energy Transfer.

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ENERGY SOURCES

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  1. ENERGY SOURCES SOL 6.2 b, c, d

  2. There are many important _______ _______ on Earth. energy sources Our _____ is responsible for creating most of them. SUN

  3. Energy cannot be created or destroyed. Energy Transformation Energy Transfer It can only be transferred or transformed.

  4. There are manydifferentenergysources that humans use to power their homes, cars, businesses, and belongings. The mostwidelyused energy sources on Earth make up a group called FOSSILFUELS. “FOSSIL FUELS” are FUELS we burn that are MADEFROMFOSSILS. They come in THREE FORMS: - a solid (COAL) -a liquid (OIL –also called PETROLEUM) -a gas (NATURAL GAS)

  5. HOW IS COAL MADE ???

  6. HOW ARE OIL AND GAS MADE ?

  7. THERE ARE MANY OTHER ENERGY SOURCES TOO…

  8. Earth’s energy sources can be grouped into two types: NON-RENEWABLE _________________ ___ ____ __ _________ __ _________ __ _ ______ ________ __ _____. _________________ ____ __ _________ __ _________ __ __ _____ _______ ___ ______ RENEWABLE CAN be re-made or re-grown in a short amount of time. Can NOT be re-made or re-grown in a short amount of time

  9. NON-RENEWABLE ENERGY SOURCES RENEWABLE ENERGY SOURCES Fossil Fuels COAL SOLAR solar panel OIL (PETROLEUM) WIND wind turbines NATURAL GAS WATER (HYDROPOWER, TIDAL, & WAVES) NUCLEAR GEOTHERMAL nuclear power plant BIOMASS Wood Leaves Crops Food Waste Manure

  10. NON-RENEWABLE ENERGY SOURCES ADVANTAGES DISADVANTAGES FOSSIL FUELS COAL • -Greenhouse gases when mined/burned • -Soot when burned causes illness • -Dangerous for miners • -Mining pollutes land & water -LOTS of it in U.S. -Not too expensive to mine OIL (PETROLEUM) -Easy to get out of ground & move through pipelines or by ship -Greenhouse gases when burned -Spills at oil wells & pipelines pollute land & water NATURAL GAS -LOTS in the U.S. -Easy to transport through pipelines -Greenhouse gases released when made, transported & burned -Risky to make (Gulf of Mexico-2010) -Need lots of water to make -Toxic chemicals when made NUCLEAR ENERGY -Less greenhouse gas -Can be made where energy is needed -Large supply of uranium -Radioactive waste-no safe disposal method. -Risk of radioactive leaks into air/water/soil cause cancer in humans -Expensive insurance paid by government.

  11. RENEWABLE ENERGY SOURCES ADVANTAGES DISADVANTAGES SOLAR -Endless & predictable supply -Does not pollute -Must have sunny days -For large amounts, need large area such as the desert WIND -Doesn’t pollute air & water -Can be located where energy is needed -Wind speed varies from place to place & at different times of the year -Can cause injury &death to birds & bats WATER (hydro-) -Big supply in U.S. -Less polluting than fossil fuels -Must be near water -Water behind dams make greenhouse gas -Dams & reservoirs disrupt fish migrations –Building dams may require people to move GEO-THERMAL -Unlimited & constant supply -Non-polluting -Can be made most places -Can only be used where it is produced -Expensive to get to deep supplies of this energy source -When corn is grown to burn for energy, it’s not used as food for people or animals -Power plants to burn biomass or trash cleanly are expensive to build BIOMASS -There’s a lot of it -Reduces trash in landfills

  12. THE GREENHOUSE EFFECT is… caused by a thin“blanket”of gases we call the atmosphere that surrounds our planet. GOOD NEWS: This keeps Earth’s temperature comfortable--no extreme cold or heat. BAD NEWS:Carbon dioxide (CO2)&other gases are building up around Earth which is like adding an EXTRA blanket,thatkeeps in TOO MUCH heat, making Earth TOO warm & keeping unhealthy gases near Earth’s surface.

  13. So…How does too much CARBON DIOXIDE get into the atmosphere? MOSTLY from BURNINGFOSSILFUELS in our homes, cars, power plants, and factories.

  14. * IF WE BURN MORE FOSSIL FUELS, THEN THE GREENHOUSE EFFECT AND GLOBAL WARMING WILL INCREASE, WHICH IS HARMFUL TO LIFE ON EARTH. INDEPENDENT VARIABLE (cause) _______________________________ DEPENDENT VARIABLE (effect) _______________________________

  15. If we know that fossil fuels are causing the “greenhouse effect” & hurting our planet…what can we do about it? We can DECREASE the use of FOSSIL FUELS, like: COAL, OIL, & NATURAL GAS (2) We can INCREASE the use of RENEWABLE energy sources,like: SOLAR, WIND, HYRDROPOWER, GEOTHERMAL, & BIOMASS.

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