Unit 2 Science Name: _________________________

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Across
  1. 3. a device that contains a wheel with blades that rotate by the pressure of moving water, steam, or air
  2. 6. the burning of a fuel to produce heat and light
  3. 7. a device that changes the energy of motion into electrical energy
  4. 9. a fossil fuel gas that is burned for energy
  5. 12. a substance produced by pressure and decaying organisms that is used for energy
  6. 13. first or most important
  7. 15. an energy source made from unstable elements, such as uranium
  8. 18. a gas that makes the atmosphere able to hold more heat, such as carbon dioxide and water vapor
  9. 19. the release of something into the environment
  10. 20. can be used
  11. 21. energy from the movement of water
  12. 22. an effect
Down
  1. 1. energy created by pressure and heat underneath Earth's crust
  2. 2. object made for a specific purpose
  3. 4. a device in a power plant that reduces the amount of released pollutants sent into the air
  4. 5. device that stores chemical energy that can change into electrical energy
  5. 8. an unstable element used by humans as an energy source
  6. 10. a solid fossil fuel that is burned to transfer energy
  7. 11. a substance that releases energy when it burns
  8. 14. the result of an event
  9. 16. a liquid fossil fuel that can be burned to transfer energy
  10. 17. a harmful substance released into the environment