HW#2: An Introduction to Geology
Instructions: Answer the questions below using one to five sentences.
7. List and briefly describe the four spheres that constitute the Earth system.
8. Compare the height of the atmosphere to the thickness of the geosphere.
9. How much of Earth’s surface do oceans cover? What percentage of Earth’s water supply do oceans represent?
10. What are the two sources of energy for the Earth system?
11. Name and briefly outline the theory that describes the formation of our solar system.
12. List the inner planets and outer planets. Describe basic differences in size and composition.