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ENERGY RESOURCES

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  1. ENERGY RESOURCES

  2. What is Energy? The ability to do work.

  3. We use energy to do a lot Here’s the breakdown of how it’s used:

  4. Where does our energy come from?

  5. Can energy be “made”? The 1st law of thermodynamics says that…. ENERGY CAN NOT BE CREATED NOR DESTROYED

  6. So….How do we get our energy?

  7. It can be CONVERTED….. From potential to kinetic energy

  8. Here’s an example:

  9. So what form is our energy converted from? Most of our energy comes fromCHEMICAL ENERGYthat is stored inFOSSIL FUELS

  10. FOSSIL FUELS • Coal • Oil • Natural Gas

  11. COAL Where does it come from ?

  12. Coal was once plant material • and the plants got their energy from…. • The SUN

  13. How do we extract the coal? We sink mine-shafts into the earth….

  14. …or we can use “Open-Cast” mining.

  15. Mountain Top Removal video

  16. Much of the world’s energy still comes from coal. • The US generates ½ its electricity from coal • it’s cheap & plentiful

  17. What are the advantages of using coal? • There’s plenty of it • It’s relatively cheap • Our conventional power stations are designed to use it.

  18. What are the disadvantages of using coal? • Coal is the dirtiest of all fossil fuels. • When burned, it produces emissions that contribute to global warming, create acid rain and pollute water • Damage to water, buildings, wildlife, & habitat • Dangerous to Miners • There have been 104,000 deaths in US mines since 1900 • 29 miners died in 2012 in West Virginia.

  19. Clean Coal Technology Seeks to reduce harsh environmental effects by using multiple technologies to clean coal and contain its emissions.

  20. Moran Plant in Burlington, VT 1954-1986

  21. OIL

  22. Millions of years ago, the dead bodies of living things settled to the bottom of the ocean. As they were buried, the remains turned slowly into OIL.

  23. The oil is trapped in pockets in the rock.

  24. Oil is pumped up from deposits deep underground.

  25. Sometimes the oil rigs are off-shore.

  26. Next it is refined and turned into a range of different fuels.

  27. What are Oil’s advantages? • It’s easy to transport • It’s easy to store • It’s easy to use

  28. We use a lot of it:

  29. But what are the disadvantages?

  30. If an accident occurs…..

  31. A tanker wreck causes catastrophic pollution

  32. Kuwait Oil Fires in 1991

  33. Oil isn’t found everywhere

  34. Consequently wars are fought for it:

  35. And extraction can harm ecosystems: Ex. Arctic National Wildlife Refuge

  36. NATURAL GAS…. …FROM THE SAME SOURCES AS OIL

  37. Natural gas can also be used as a fuel to generate heat, and from that, electricity

  38. Fracking overview • Define fracking and explain the process in general. • What are some possible environmental impacts of fracking? • Explain why some people are concerned about the fracking process. • Do you think that gas drilling companies should be compelled to tell the public which chemicals they are using? Why or why not? • What scientific evidence so far suggests a possible link between fracking and human illness? • How would you design an investigation to establish a possible link between fracking and negative impacts on human health?

  39. But burning ANY fossil fuel causes pollution and the carbon dioxide adds to the “greenhouse effect”...

  40. Cars are amongst the worst polluters… but what’s the alternative?

  41. Industry pollutes the air with sulphur dioxide

  42. Oil refineries….

  43. Just about everywhere, we are pouring pollutants out into the air

  44. So, no matter what fossil fuel we use to make electricity, it can be contributing to global warming.

  45. …and acid rain.

  46. ….and what about NUCLEAR power? • using nuclear reactions to produce energy for commercial use. • Involves nuclear fission– the splitting of the nucleus of a large atom into two or more smaller nuclei. • This involves a release of a lot of heat energy which can be used to generate electricity.