Earth Ch. 4

1. Any raw material we use from our environment is a ______ resource
3. The ________ is the earth's out layer and is make of relatively low-density rock
6. What is a key aspect of operational science?
8. Geologists call the combination of the upper mantle and the crust the _______
10. Nearly three-fourths of the earth's surface is covered in _____
11. The Earth's atmosphere is made of gases that are _____ and clear
13. The ________ takes up 84% of the earth's volume.
14. What galaxy is Earth located in?

1. Natural resources that get used up and can't be replenished are called ____ resources
2. Too much _____ would tire muscles and require heavier bones to avoid breakage
4. _____ is the study of the earth
5. What provides a physical shield from meteors and comets?
7. Using resources at a rate that allows them to replenish is called maintaining a _____ yield
9. The earth's _____ is inclined 23.5 degrees from the vertical
11. The ________ contains about 15% for the earth's volume and is believed to consist of liquid and solid materials
12. Air is an example of a ____ resource