Energy+review

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  • Energy+review

    1. 1. Energy Test Review Keynote
    2. 2. What are the two unitsof measure for energy?
    3. 3. BTU and joule
    4. 4. What is a turbine?
    5. 5. The part of a powerplant that turns because of the source ofenergy. The turbine then turns the generator.
    6. 6. What are the three main fossil fuels?
    7. 7. coal, oil, and natural gas
    8. 8. Where do we getbiomass (3 sources)?
    9. 9. our trash, animalmanure, and dead plants
    10. 10. How is geothermal energy made?
    11. 11. the earth’s own heat heats up the underground water
    12. 12. How do hydro dams work?
    13. 13. A dam is built to holdback flowing water of ariver (producing a man-made lake). Water is let through the dam thatspins turbines built into the dam. The turbine spins a generator.
    14. 14. What is nuclear fission?
    15. 15. splitting the nucleus of an atom
    16. 16. What two ways do we use ocean energy?
    17. 17. actually three - but youneed to know two: wave,currents (temperatures), and tides
    18. 18. What is the mostimportant part of solar energy?
    19. 19. the sun
    20. 20. What is nuclear fusion?
    21. 21. combining nuclei of two or more atoms
    22. 22. How do windmills work?
    23. 23. The blades of thewindmill are designed tocapture wind. The blades turn which turns the generator.
    24. 24. What is the differencebetween renewable and nonrenewable energy?
    25. 25. A renewable resource can be replenished atleast as quickly as it is used while anonrenewable resource cannot.
    26. 26. How does a turbine work?
    27. 27. Steam, liquid water, or wind moves past itcatching the blades andcausing it to turn. It isattached to a generator causing it to produce electricity.
    28. 28. What part of fossilfuels are we really using?
    29. 29. Carbon
    30. 30. Is biomass energy renewable or nonrenewable?
    31. 31. renewable
    32. 32. What properties of aconductor makes it a good conductor?
    33. 33. 1. It holds the electrons loosely2. The atoms are tightly packed together- these two things allow the energy to pass easily
    34. 34. Which nuclear reactiondo nuclear power plants use: fission or fusion
    35. 35. nuclear fission
    36. 36. How does a photovoltaic cell work?
    37. 37. When the sun strikes the photovoltaic cell it knocks electrons loose. The electrons travel to the front surface causing a charge imbalance. Thatimbalance causes a current to move.
    38. 38. Is wind energy renewable ornonrenewable?
    39. 39. renewable
    40. 40. What source of energy do we use the most?
    41. 41. fossil fuels
    42. 42. Give three examples of good conductors.
    43. 43. metal, impure water, graphite
    44. 44. What properties aboutan object increase its resistance?
    45. 45. the thinner and longer it is
    46. 46. What is the purpose of the turbine?
    47. 47. to turn the generator
    48. 48. Give three examples of insulators.
    49. 49. wood, rubber, cold glass
    50. 50. Are fossil fuels renewable ornonrenewable?
    51. 51. nonrenewable
    52. 52. How do we use tides for power?
    53. 53. Water from the hightide can be trapped in reservoirs and forcedthrough hydro-electric dam.
    54. 54. Explain what the“Conservation of Energy” means.
    55. 55. Energy is neithercreated nor destroyed; only transformed into other forms. We can take heat energy andturn it into electricity,but we cannot CREATE.
    56. 56. How does a generator work?
    57. 57. A wire surrounded by amagnet is turned by the turbine. The spinning metal pushes out the electrons in the inner part of the magnet - electricity flows.
    58. 58. Why do we want resistance?
    59. 59. We use resistance toslow down the flow ofelectricity to produce heat or light.

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