CostasA Energy Crossword

2. A source of flammable energy composed by chemicals changing.
4. A factory where crude oil is converted to other substances.
7. the main use of coal as a fuel in the U.S.
9. heat from Earth's interior.
14. A mixture of gasoline and natural alcohol used as fuel in cars.
15. the least used significant energy source of electricity production in the U.S.
19. powers things like heat, electricity, and transportation as fuel.
21. energy produced by flowing water.
25. two ways of energy _ are solar panels and insulation.
26. A practical form of nuclear energy involving nuclei splitting.
27. the main use of oil as a fuel in the U.S.
29. keeping heat trapped inside spaces.
30. produced from steam reforming and used for energy.

1. one of the most efficient and clean energy sources, but also the most potentially dangerous.
3. factors that weaken or disable an energy source.
5. movements in water capable of creating energy or power.
6. an impractical form of nuclear energy.
8. used to create energy with wind and water.
10. chemical carbons made of carbon and hydrogen.
11. wood, plant parts, manure, and food wastes that can be used as fuels.
12. A negative substance released into the air as a side effect of some energy sources.
13. chemical compounds made from oil.
16. fuel sources capable of being renewed.
17. fuels formed naturally under extreme pressure and long periods of time.
18. the original source of the energy in wind and flowing water.
20. machines that create electricity when turbines help move them.
22. fuel sources that cannot be renewed.
23. used in the production of panels used in solar energy gathering.
24. the leading energy source of electricity production in the U.S.
28. Energy that comes directly from the sun's rays.