Topic 6 6th grade

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Across
  1. 7. wind energy is actually an indirect form of ___ energy because it heats the air and causes it to rise
  2. 8. the U.S. uses 25% of the world’s oil but only ____% comes from the U.S., the rest is imported
  3. 9. a difference in how coal and oil form is that oil forms from ____ plants and animals
  4. 11. this energy source can only be used in areas where Earth’s crust is very thin
  5. 13. this is where crude oil is separated into fuels and other products
  6. 16. these are compounds made from oil used to make products like plastics and cosmetics
  7. 18. the name of the oil rig that exploded in 2010 in the Gulf of Mexico
  8. 19. natural gas has ___ odor
  9. 21. these three things are needed to make fossil fuels if you have decayed plant and animal matter
  10. 23. this power source uses moving water to turn a turbine
  11. 24. when coal first starts to form it is called this material- there are bogs of it around the world
  12. 25. this energy source comes from the intense heat of Earth’s interior
  13. 27. getting away from using fossil fuels is important because their use is ___ our atmosphere
  14. 28. this fossil fuel produces the lowest levels of pollution
  15. 29. a substance that provides energy
  16. 30. when coal is in this form or stage of change it is the product that has the most energy per volume energy
  17. 32. ____ is the process used to create electricity from splitting atoms
  18. 35. solar power can be used by using _____ to direct heat to boil water
  19. 38. coal, oil, and natural gas are the 3 main ___ ____
  20. 40. in producing ____ power, the energy source is radioactive elements
  21. 41. if the fuel rods in the reactor vessel of a nuclear power plant overheat, this can occur
  22. 43. using solar panels on your roof to heat your water tank in your house is called ____ solar heating
  23. 44. this fossil fuel comes from decayed terrestrial plants and animals
  24. 45. this fossil fuel comes from decayed marine plants and animals
Down
  1. 1. wood and vegetable oils is an example of this type of fuel
  2. 2. using windows to warm the air in your house is called ____ solar heating
  3. 3. most forms of electricity are made when steam is created to turn a ____ which will turn a generator
  4. 4. look for appliances and light bulbs rated with the ____ ____ label to get better efficiency
  5. 5. the most expensive renewable energy source is _______ because of the massive structure that must be built to accomplish it
  6. 6. fossil fuels are ____ sources of fuels because they take so long to produce
  7. 7. minerals can come from ____ when the liquid evaporates and leaves behind solid minerals
  8. 10. the country where there was a nuclear meltdown in 2011 due to a Tsunami
  9. 12. the ___ vessel is where nuclear fission occurs in a nuclear power plant
  10. 14. when minerals are made by living organisms they are called ___ minerals, like coral and bone and amber
  11. 15. using fluids and chemicals pumped underground to break up pockets of natural gas
  12. 17. taking a walk instead of riding in a car is practicing good energy ____
  13. 20. removing salts and minerals from water is called this process
  14. 22. this is the percentage of energy that is actually used to perform work
  15. 26. when wind turbines cause disorienting shadows on the ground it is called this
  16. 31. fossil fuels have ___ times the energy when compared to the same mass of firewood
  17. 33. elements that are ____ can be used as a fuel source in nuclear power plants
  18. 34. a layer of material used to trap heat and prevent the transfer of heat
  19. 36. the country where there was a nuclear meltdon in the 1980s
  20. 37. fossil fuels contain ___, which are rich in carbon and hydrogen
  21. 39. these are found in small electronic devices like calculators to power them with the sun
  22. 42. another name for oil, or crude oil is this