6th grade chpt 6 Energy Resources

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Across
  1. 4. coal, oil, and natural gas are the 3 main ___ ____
  2. 8. wood and vegetable oils is an example of this type of fuel
  3. 9. using windows to warm the air in your house is called ____ solar heating
  4. 10. taking a walk instead of riding in a car is practicing good energy ____
  5. 11. natural gas has ___ odor
  6. 13. the U.S. uses 25% of the world’s oil but only ____% comes from the U.S., the rest is imported
  7. 14. fossil fuels are ____ sources of fuels because they take so long to produce
  8. 15. in producing ____ power, the energy source is radioactive elements
  9. 18. using solar panels on your roof to heat your water tank in your house is called ____ solar heating
  10. 19. this is the percentage of energy that is actually used to perform work
  11. 23. these are found in small electronic devices like calculators to power them with the sun
  12. 25. this energy source comes from the intense heat of Earth’s interior
  13. 26. elements that are ____ cam be used as a fuel source in nuclear power plants
  14. 27. getting away from using fossil fuels is important because their use is ___ our atmosphere
  15. 28. fossil fuels have ___ times the energy when compared to the same mass of firewood
Down
  1. 1. this fossil fuel comes from decayed terrestrial plants and animals
  2. 2. fossil fuels contain ___, which are rich in carbon and hydrogen
  3. 3. a layer of material used to trap heat and prevent the transfer of heat
  4. 5. another name for oil, or crude oil is this
  5. 6. nuclear ____ is used to create electricity from splitting atoms
  6. 7. the ___ vessel is where nuclear fission occurs in a nuclear power plant
  7. 9. these are compounds made from oil
  8. 12. this fossil fuel comes from decayed marine plants and animals
  9. 13. most forms of electricity are made when steam is created to turn a ____
  10. 16. this fossil fuel produces the lowest levels of pollution
  11. 17. this is where crude oil is separated into fuels and other products
  12. 20. wind energy is actually an indirect form of ___ energy
  13. 21. look for appliances and light bulbs rated with the ____ ____ label to get better efficiency
  14. 22. these three things are needed to make fossil fuels if you have decayed plant and animal matter
  15. 24. if the fuel rods in the reactor vessel of a nuclear power plant overheat, this can occur