Across
- 2. what is most of the coal used for
- 6. the percent of coal used in the USA is
- 8. as water moves through tunnels it turns turbines which are connected to a
- 11. A energy rich chemical compound that contains carbon and hydrogen atoms
- 13. blades shafts gears a generator and a cable these parts work together to convert the winds energy into
- 15. A chemical made from oil
- 16. Hydrogen burns
- 17. electricity produces using the energy of flowing water
- 18. air in motion
- 21. A substance that provides energy because of chemical change
- 24. Heat from earth's interior
- 25. 61 percent of oil is used on electric power in the
- 26. light and heat given off by the sun
- 28. isn't usually used as a fossil fuel
Down
- 1. the percent of oil used on industry in the USA
- 3. A factory in which crude oil heated and separated into fossil fuels and other products
- 4. a material that blocks heat transfer between air and outside a building is called
- 5. replenishes in a relatively short amount of time
- 7. three types of fossil fuels are natural gas, oil and
- 9. a mixture of gasoline and alcohol
- 10. three examples of petrochemicals are cosmetics, paint, and
- 11. it is made from another substance since it isn't on earth it must be man maid
- 12. solar energy comes from the
- 14. what percentage of coal mined in the US is exported to other countries
- 19. cannot be replenished in a short amount of time
- 20. solar energy is only collectable when it is
- 22. wood, plant parts, manure, and food wasted that can be used as fossil fuels
- 23. oil is mainly used for
- 27. Hydrogen creates no acid rain or