Across
- 4. a machine that is made to help produce power and in normally uses a wheel or rotor.
- 7. cool air that is descending into the ocean but is blown into land by the sea breeze
- 8. device that is used to measure the wind's speed
- 9. help to create human reservoirs
- 11. when you turn off the light bulb, you save_________
- 14. substance that provides energy
- 15. a chemical compound that can be used as an energy
- 17. energy that is created by flowing water
- 18. energy that is created by using heat found inside the earth.
- 20. is a turning heat energy into machinal energy
- 22. the effectiveness of the product in relation to its cost
- 26. energy created by the combination of two cells
- 27. help to capture solar energy
- 29. a factory that has crude oil is heated and separated into fuel
- 30. help keep heat trapped in a building
Down
- 1. source that is being used much faster than it can be produced
- 2. energy created from the waves
- 3. energy used for treating metals, processing food and this cannot be found on earth.
- 5. energy that is created by using the fast wind
- 6. compounds that are made from oil like, Plastic and paint
- 10. the fuel rods get so heated they melt
- 12. mixture of gasoline and alcohol
- 13. energy that is created by the splitting of two cells
- 16. gases that absorb the infrared radiation, making the earth warmer.
- 19. a fuel made by the remains of the past living organisms
- 21. energy that could come from butanol
- 23. what is most oil used mostly for
- 24. energy that is created by sunlight
- 25. what is most coal used for in the USA
- 28. The source is being produced as the same rate as it is being used