Across
- 5. wood, plants parts, manure, and food wastes that can be used as fuels
- 7. thermal energy converted to mechanical energy
- 8. are formed from the dead remains of organisms that lived a long time ago
- 9. energy given off by the sun
- 12. this is a type of energy that can't be remade in a short amount of time
- 15. the energy produced by fast moving air
- 24. It is the percentage of energy being used to perform a task
- 25. it is in houses and traps heat. (It's like cotton candy)
- 26. it is made by mixing alcohol and gasoline
- 27. it means to save energy
- 28. it takes place in a factory in which crude oil is heated and separated into fuels and other products.
Down
- 1. when they spin it generates electricity
- 2. it is when fuel rods generate so much heat that they start to melt
- 3. how wind, flowing water and tides are used to produce electricity
- 4. better light bulbs
- 6. this is a type of energy that can be remade in a short amount of time
- 10. it is a type of electricity that happens when combining hydrogen and oxygen
- 11. energy from water
- 12. when the thing hits the nucleus it splits into two smaller nuclei
- 13. it is the combining of two atomic nuclei to produce a single larger nucleus
- 14. what is most coal in the U.S used for
- 16. mixtures that are made from oil
- 17. it is the splitting of an atom's nucleus into two smaller nuclei
- 18. heat from earth's interior
- 19. switching off the light saves what
- 20. they are a chemical mixture that contain carbon and hydrogen atoms
- 21. they capture solar energy
- 22. this a type of need that humans need for travelling around
- 23. A substance that provides energy