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Energy Sources on Earth: Nonrenewable vs. Renewable

Explore the various sources of energy on Earth, including nonrenewable resources like fossil fuels and nuclear energy, and renewable resources like wind, solar, and hydroelectric power. Learn about the advantages and disadvantages of each source.

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Energy Sources on Earth: Nonrenewable vs. Renewable

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  1. TOPIC: Energy AIM: Describe the various sources of energy that exist on Earth. Do Now: http://www.brainpop.com/science/energy/formsofenergy/ HW: Work on your atom drawing/model. Due on Friday!!!!!

  2. Which skier will have a greater potential energy?  Support your answer.

  3. Which of the following increases when a metal spring is stretched horizontally? • Potential energy • Kinetic energy • Gravitational potential energy • Electrical energy

  4. Identify the form of energy being described. • Windmills • Food • Moving roller coaster • Created as a result of Friction • Gasoline • Created by light bulbs • A moving car • Batteries • Lightening • Found in the nucleus of an atom • Sunlight

  5. A family is moving from Pennsylvania to Connecticut. As the moving van burns gasoline, it converts • chemical energy into mechanical energy • kinetic energy into potential energy • thermal energy into electrical energy • mechanical energy into kinetic energy

  6. Which device produces mechanical energy? • A battery • A light bulb • An electric motor • A solar cooker

  7. A song is playing on the radio. Which best describes the change in the flow of energy? • Electrical energy  light energy • Electrical energy  sound energy • Sound energy  light energy • Sound energy electrical energy

  8. Remember the Law of Conservation of Energy: Energy can’t be created nor destroyed, just changed from 1 form to another

  9. Major source of Energy on earth The sun

  10. Nonrenewable Energy Resources Resources that can’t be replaced by natural processes as quickly as they are used Takes millions of years for nature to reproduce

  11. Examples of Nonrenewable Energy Resources 1.Fossil fuels = formed from remains of ancient plants & animals

  12. Release carbon dioxide (global warming)

  13. 2.Petroleum: liquid, highly flammable Formed from plant remains

  14. Used to produce: - Oil (burned to produce energy) - Lubricants (grease, motor oil)

  15. - Plastics - Synthetic fibers - Asphalt

  16. 3.Natural Gas: Burned to provide energy for cooking, heating…

  17. Burns more cleanly than other fossil fuels

  18. 4. Coal: solid fossil fuel

  19. 90% of coal used is burned to generate electricity

  20. Creates more pollution

  21. 5. Nuclear Energy: found in the nuclei of atoms Power plants convert this to electrical energy

  22. Use the process of FISSION(nucleus of atom breaks apart)

  23. Advantages of nuclear energy • Power plants could still produce electricity after coal and oil become scarce

  24. Power plants need less fuel than ones which burn fossil fuels. (One ton of uranium produces more energy than is produced by several million tons of coal or several million barrels of oil)

  25. Do not produce air pollutants & CO2

  26. Disadvantages of nuclear energy • Nuclear explosions produce radiation. • harms body cells  illness or death • Reactor disaster = meltdown. • Fission reaction goes out of control  nuclear explosion

  27. Chernobyl, Ukraine, 1986 = reactor core overheated during safety test. Materials in the core caught fire and caused a chemical explosion that blew a hole into the reactor. Radiation was carried by the wind. Twenty-eight people died of radiation sickness.

  28. Water used to cool power plants • excess heat may kill organisms in streams & rivers it’s released into

  29. Wastes release radiation • Cannot be thrown away like garbage • Stored in special cooling pools at the nuclear reactors

  30. TOPIC: Energy AIM: Describe the various sources of energy that exist on Earth. Do Now: Describe some examples of nonrenewable resources. http://www.brainpop.com/technology/energytechnology/fossilfuels/ HW: Work on your atom drawing/model. Due tomorrow!!!!!

  31. Renewable Energy Resources Energy sources that can be replaced as quickly as it is used Will be around for millions of years

  32. 1.Wind:windmills use wind energy to pump water • Connected to electric generator Examples of renewable Energy resources

  33. http://www.youtube.com/watch?v=tsZITSeQFR0

  34. No pollution • Low costs • But if there is no wind  no energy

  35. 2.Solar energy: more expensive than using fossil fuels http://www.youtube.com/watch?v=x4CTceusK9I

  36. 3. Moving water(Hydroelectricity): Electricity produced from energy of moving water http://www.youtube.com/watch?v=fvYaCtjpMvk

  37. These use the GPE of water on hills to generate electricity as it flows downhill.

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