Fossil Fuels

1. energy from the sun (renewable source)
3. Earth's resources that can be replaced in a reasonably short time
4. known as 3 R's, ideas practiced so that resources are conserved.
7. a substance that provides energy-such as heat, light, motion or electricity
11. reducing energy use
12. produced when you add alcohol to gasoline (renewable source)
14. the intense heat from earth's interior that warms the magma (renewable source)
16. are chemical compounds that contain carbon and hydrogen atoms; fossil fuels are made of these.
19. the measure of how people affect the destruction of Earth and its resources
20. made from living things (renewable source)

2. Earth's resources that cannot be replaced in a useful time
5. the percentage of energy that is actually used to perform work
6. a factory in which crude oil is heated and separated into fuels and other products.
8. energy rich substances formed from the remains of organisms; the three major fossil fuels are coal, oil and natural gas.
9. a solid fossil fuel formed from plant remains
10. compounds that are made form oil; are used to make plastics, paints, medicines and cosmetics.
13. also known as energy conversion; a change from one form of energy to another
15. electricity produced by flowing water (renewable source)
17. a mixture of methane and other gases; forms from some of the same organisms as oil.
18. a thick, black, liquid fossil fuel. It formed from the remains of small animals, algae and other organisms that lived in oceans and shallow inland seas hundred of millions of years ago.