Chapter 8.1 Guided Reading

1. A common rock found in oceanic crust
7. The type of crust under land, usually made of granite and less dense
9. The thickest layer of Earth located between the crust and core
11. A common rock found in continental crust
13. The thin outer layer of Earth where we live
15. The idea that natural processes have always worked the same way and speed
18. The rigid outer layer made of the crust and upper mantle
20. The soft, slowly flowing layer beneath the lithosphere

2. The view that most geologic features formed thousands, not millions, of years ago
3. The liquid layer of the core that helps create Earth’s magnetic field
4. Information from earthquake waves used to study Earth’s interior
5. The thinner, denser crust under the ocean floor made mostly of basalt
6. The solid center of Earth caused by extreme pressure
8. A modern view that combines steady processes with major disasters
10. Sudden violent events like floods, volcanoes, and earthquakes
12. The amount of mass in a given volume of material
14. The idea that geologic change can happen quickly from major events
16. The invisible force around Earth created by the spinning liquid outer core
17. The innermost layer of Earth made mostly of iron and nickel
19. A green mineral commonly found in mantle rocks