Homework

3. Solid, relatively low density rock
5. The belief that earth-forming processes are natural,have always been the same,and have always happened at the same gradual rate
7. The study of earth
8. management The effort to oversee and control the use of natural resources is called resource management
11. resource Cannot be replenished,or are hard to replace
12. Boundary between the crust and the mantle

1. The upper mantle is about 40 mi thick between the ocean basin crust and 80-160 mi thick under the continents
2. resource Any raw resource that we use from our environment
4. Takes up 84% of the earth’s volume
6. resource Have an unlimited supply or are easily replenished
9. Occupies the earth’s center below the mantle
10. view Idea of an ancient earth