Natural Resources

6. heat energy provided from inside the earth
7. energy provided from burning materials such as dead plants or trees
8. thick, black liquid mixture of naturally occurring hydrocarbons that forms from the buried remains of marine organisms.
9. sedimentary rock that is the most abundant fossil fuel in the world
10. energy from the sun
13. root word meaning water
14. resources are replaced through natural processes at a rate that is equal to or greater than the rate at which they are used
15. resources that include copper, gold, or silver
16. type of mining used to remove materials through a series of tunnels

1. broad term of materials that includes oil and natural gas
2. anything that harms or degrades the natural environment
3. property that includes the ability to burn or react to acid.
4. Reprocess a resource so that the materials can be used in another item.
5. property of a mineral that includes hardness, luster, color, texture, cleavage, and density
10. soil and rock removing process used when resources are close to the earth's surface
11. using a material again without changing or reprocessing it
12. resources are exhaustible and are extracted faster than the rate at which they formed