Across
- 4. Light and heat given off by the sun.
- 5. A substance that provides enough energy such as light, motion, or electricity.
- 9. Heat from sun heat being trapped by windows.
- 11. Made from water, biomass, and natural gas.
- 13. Heat from Earth's interior.
- 15. Electricity produced by flowing water.
- 17. What solar panels are made up of.
- 18. What oil only supports 5% of.
- 20. A factory which crude oil is heated and separating fuel and other products.
- 21. Energy conversion that occurs when a car engine burns gasoline.
- 23. What happens when fuel rods produce too much heat
- 25. Compounds made from oil.
- 28. The combining of an atom's nucleus into two nuclei
- 29. Only used as 2.2% of energy in America.
Down
- 1. The combining of two atomic nuclei.
- 2. What coal, natural gas energy is.
- 3. What solar, wind, and geothermal energy is.
- 6. Besides solar energy this energy comes from the sun.
- 7. What coal supports only 1% of.
- 8. What solar space heating resembles.
- 10. Adding alcohol to gasoline forms this.
- 12. Chemical compounds that contain carbon and hydrogen atoms.
- 14. The largest collective renewable energy source in America.
- 16. Energy that comes from movement of a turbine.
- 19. Layer that traps heat and decreases the amount of heating energy a house needs
- 22. What oil is mainly used for.
- 24. Wood, plant parts, manure, and food wastes can be used as this.
- 26. What wind energy blows on to start an electric current.
- 27. Mostly used source of electricity in America.