Energy

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Energy

  1. 2. Warm Up – Page 46 <ul><li>Write the question and answer it: </li></ul><ul><ul><li>What do you think is the best energy source to use? Why? </li></ul></ul><ul><li>Copy today’s date and EQ. </li></ul><ul><ul><li>What are the advantage and disadvantages of renewable and nonrenewable energy resources? </li></ul></ul>
  2. 3. Nonrenewable Resources <ul><li>It’s not replaced as quickly as it is used. </li></ul><ul><li>Takes a long time for these to form. </li></ul><ul><li>Currently we depend on fossil fuels, which are nonrenewable for the majority of our energy. </li></ul>
  3. 4. Coal
  4. 5. Coal <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>Abundant supply </li></ul><ul><li>Currently inexpensive to mine </li></ul><ul><li>Reliable and able to generate large amounts of power </li></ul><ul><li>Emits greenhouse gases and causes acid rain </li></ul><ul><li>Mining can be dangerous </li></ul><ul><li>Eventually, the coal supply will run out </li></ul>
  5. 6. Oil and Natural Gas
  6. 7. Oil (Petroleum) <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>Good fuel for vehicles </li></ul><ul><li>Economical to produce </li></ul><ul><li>Easy to transport </li></ul><ul><li>High carbon dioxide emissions </li></ul><ul><li>Found in limited areas </li></ul><ul><li>Supply may be used up soon </li></ul><ul><li>Environmental impact through drilling and transporting </li></ul>
  7. 8. Natural Gas <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>Widely available </li></ul><ul><li>Cleanest burning fossil fuel </li></ul><ul><li>Unavailable in many areas </li></ul><ul><li>Still pollutes some </li></ul><ul><li>Pipelines impact environment </li></ul>
  8. 9. Nuclear <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>No greenhouse gases </li></ul><ul><li>Produces huge amounts of energy from small amounts of fuel. </li></ul><ul><li>Produces small amounts of waste. </li></ul><ul><li>Nuclear power is reliable. </li></ul><ul><li>Although not much waste is produced, it is very, very dangerous. It must be sealed up and buried for many years to allow the radioactivity to die away. </li></ul><ul><li>Nuclear power is reliable, but a lot of money has to be spent on safety – if it does go wrong, a nuclear accident can be a major disaster. </li></ul>
  9. 10. Reflection Questions <ul><li>Choose 1 and answer on page 47 in at least 1 sentence </li></ul><ul><ul><li>What were the two most important points in what we just looked at? </li></ul></ul><ul><ul><li>Compare/contrast the use of fossil fuels and nuclear energy. </li></ul></ul><ul><ul><li>Which of the types of energy we have talked about do you feel is the best? Why? </li></ul></ul><ul><ul><li>Create a simile for fossil fuels. </li></ul></ul>
  10. 11. Renewable Resources <ul><li>Renewable resources can be replaced in a relatively short period of time (like your lifetime). </li></ul>
  11. 12. Solar <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>It’s free </li></ul><ul><li>There’s no waste and no pollution </li></ul><ul><li>It will last for 5 billion years </li></ul><ul><li>Expensive to build power stations </li></ul><ul><li>Can’t collect it at night </li></ul><ul><li>Can be unreliable if you’re not in a sunny climate </li></ul>
  12. 13. Wind <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>Wind is free and requires no fuel </li></ul><ul><li>No waste </li></ul><ul><li>Land below can still be used for farming </li></ul><ul><li>Good for remote areas </li></ul><ul><li>Can become a tourist attraction </li></ul><ul><li>Wind is unpredictable and sometimes there is no wind </li></ul><ul><li>The land in windy areas may be expensive </li></ul><ul><li>Can kill birds </li></ul><ul><li>Is noisy and can effect TV reception </li></ul>
  13. 14. Hydroelectric
  14. 15. Hydroelectic <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>Energy is virtually free once the dam is built </li></ul><ul><li>No waste </li></ul><ul><li>More reliable than wind and solar </li></ul><ul><li>Water can be stored for peak demands </li></ul><ul><li>Expensive to build dams </li></ul><ul><li>Building the dam will flood a large area </li></ul><ul><li>Find the right place is difficult </li></ul><ul><li>Water quality and quantity can be effected downstream </li></ul>
  15. 16. Tidal
  16. 17. Tidal <ul><li>Turbines are placed underwater like with a dam. Tidal turbines have to spin 180 degrees because the tide switches directions 4 times a day! </li></ul><ul><li>Turbines are placed </li></ul><ul><li>underwater like with a dam. Tidal turbines have to spin 180 degrees because the tide switches directions 4 times a day! </li></ul>
  17. 18. Tidal <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><ul><li>Once you've built the dam, tidal power is free. </li></ul></ul><ul><ul><li>It produces no greenhouse gases or other waste. </li></ul></ul><ul><ul><li>It needs no fuel. </li></ul></ul><ul><ul><li>It produces electricity reliably. </li></ul></ul><ul><ul><li>Not expensive to maintain. </li></ul></ul><ul><ul><li>Tides are totally predictable </li></ul></ul><ul><ul><li>Very expensive to build. </li></ul></ul><ul><ul><li>Affects a very wide area - the environment is changed for many miles upstream and downstream. </li></ul></ul><ul><ul><li>Many birds rely on the tide uncovering the mud flats so that they can feed. </li></ul></ul><ul><ul><li>Only provides power for around 10 hours each day, when the tide is actually moving in or out. </li></ul></ul><ul><ul><li>There are very few suitable sites for tidal power stations. </li></ul></ul>
  18. 19. Reflection Questions <ul><li>Choose 1 and answer on page 47 in at least 1 sentence </li></ul><ul><ul><li>In your own words, explain solar, wind, and hydroelectric power. </li></ul></ul><ul><ul><li>Brainstorm some solutions to the disadvantages mentioned for solar power. </li></ul></ul><ul><ul><li>Of solar, wind, and hydroelectric, which would you most want to use and why? </li></ul></ul><ul><ul><li>Draw a picture of what your life would be like using solar or wind power. </li></ul></ul>
  19. 20. Biomass
  20. 21. Biomass <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>Abundant Supply </li></ul><ul><li>Fewer emissions than fossil fuels </li></ul><ul><li>Cars can be easily converted to run on biomass </li></ul><ul><li>Emits some pollution </li></ul><ul><li>Increases air pollution </li></ul><ul><li>Uses fossil fuels in conversion </li></ul>
  21. 22. Geothermal <ul><li>Advantages </li></ul><ul><li>Disadvantages </li></ul><ul><li>Minimal environmental impact </li></ul><ul><li>Low emissions </li></ul><ul><li>Low cost after initial investment </li></ul><ul><li>Few places where geothermal is workable </li></ul><ul><li>Wells could be depleted </li></ul>

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