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Energy Unit

Energy Unit. Let’s take a trip to Iceland…. Why are we going to Iceland to study energy?. http://www3.nationalgeographic.com/places/countries/country_iceland.html. Energy. is the ability to do work. Natural Resources are used to create energy for many human needs and wants.

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Energy Unit

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  1. Energy Unit

  2. Let’s take a trip to Iceland…

  3. Why are we going to Iceland to study energy? http://www3.nationalgeographic.com/places/countries/country_iceland.html

  4. Energy is the ability to do work. Natural Resources are used to create energy for many human needs and wants

  5. 2 Types of Energy Nonrenewable Energy is energy that cannot be created in our lifetime (think about 100 years). Examples: nuclear, coal, oil, natural gas Renewable Energy is energy from sources that are constantly being formed. Examples: Wind, Solar, Water (hydro), Geothermal, Biomass,Hydrogen

  6. Nonrenewable Energy Most of the energy we use comes from a group of natural resources called fossil fuels. These are the remains of ancient organisms that have changed intocoal, oil, or natural gas.

  7. Problems with Fossil Fuels • Supply is limited. • Obtaining them and using them causes negative impacts on the environment.

  8. Fossil Fuels are used for: • Transportation • Manufacturing • Heating and Cooling buildings • Generating Electricity to run machines and appliances

  9. COAL

  10. How Coal Forms…from ancient remains of plants millions of years ago

  11. Coal Pros • High grade coal produces more heat and less pollution • Helps recycle carbon • Inexpensive • Needs little refining after mining

  12. Coal Cons • Burning releases pollutants into air • Toxic chemicals can leach into streams near mines • Increase sulfur in air (Acid Rain) • Mining removes top layers of soil (Erosion)

  13. Coal Mining occurs mostly in the United States

  14. Oil and Petroleum…forms from ancient remains of animals millions of years ago

  15. PETROLEUM / OIL • Used for FUEL! Also creates plastics, clothing, paints

  16. Natural gas…always found with oil Used for cooking and heating

  17. Refinery…changes oil into…gas, plastics, clothing, etc.

  18. Air Pollution from burning fossil fuels

  19. Water polluted with fossil fuels

  20. The effects of Acid Rain from burning fossil fuels

  21. NUCLEAR POWER

  22. Nuclear Pros • Very Concentrated Energy Source • No air pollution • Releases less radioactivity than coal fired plants • Good for countries with limited fossil fuel

  23. Nuclear Cons • Building and maintaining a safe reactor is Expensive • Radioactive Waste storage • Safety concerns from Radiation leaks • Mining of uranium

  24. Renewable Energy: constantly being formed

  25. SOLAR ENERGY

  26. Solar Pros • Excellent for heating water • Less expensive • Great for developing countries • No Pollution • Available in most parts of the world

  27. Solar Cons • Some places don’t get as much winter sunshine • Inefficient • Freezing damages panels • Can’t operate on rainy days • Needs lots of space

  28. HYDROELECTRIC POWER

  29. Hydro Pros • Inexpensive to run • No air pollution • Last longer than fossil fuels • Dams can be used for • Flood control • Drinking water • Recreation

  30. Hydro Cons • Expensive to build • Dams block river flow • Ecosystem below dam in disrupted • Prevents fish from swimming up stream • If dam breaks, flooding can destroy towns

  31. Fish Ladder

  32. Geothermal Energy Almost all of Iceland's electricity and heating come from geothermal power plants.

  33. Geothermal Pros • Less pollution • Less expensive to maintain

  34. Geothermal Cons • Not everywhere • Expensive to build

  35. Wind Energy…Fastest Growing Energy Source for Electricity in the World!

  36. Wind Farms

  37. Wind Pros - Abundant - Cost effective

  38. Wind Cons - Transporting electricity from rural areas where it is generated to urban centers where it is needed is difficult • Ecosystem disruptions for birds • Noisy

  39. Biomass is…natural resources! • Biomass is any non-fossiltype of natural resource that can be burned such as trees, crops, municipal solidwaste (trash), and animal wastes,

  40. Sources of biomass energy • wood • woodchips • paper • trash • corn • sugar cane • canola • sunflower • soybeans • grains • animal waste • sewage • food scraps • hemp • straw • vegetable oil • algae

  41. Biomass Pros • Available to developing countries • Waste from cows can be burned • Can be used to make ethanol for cars • Less air pollution than fossil fuels

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