1. Chapter 22 Earth’s Interior

2. Earth’s Structure Ch 22.1 Page 660
The Science of Geology Page 660
1. Geology is the study of planet Earth, including its composition and structure.

3. Scientists who study the Earth and the processes that have shaped the Earth over time are called geologists
3. Uniformitarianism is the idea that the geologic processes that operate today also operated in the past

4. A Cross Section of the Earth Page 661

5. The Crust a. Rocky outer layer
b. Made up of silicates (silicon and oxygen)
c. 2 types- continental and oceanic
d. 40 km in thickness

6. Oceanic vs Continental
Oceanic Crust:
App. 7 km thick
More dense rocks
Ocean floor
Continental Crust:
App. 40 km thick
Less dense rocks
Continents

7. The Mantle a. Beneath the crust, thick layer of hot solid rock
b km in thickness
c. 3 layers- lithosphere (solid crust and upper mantle), asthenosphere (soft, “taffy like”), mesosphere

8. The Core Large sphere of metal that occupies Earth’s center
3480 km in thickness
The outer core is liquid
The inner core is solid because of the high amount of pressure

9. Layers of the Earth

10. Earth Layers Rap it out