1. Vocabulary Chapter 1: Lesson 2
Seismic waves
Pressure
Crust
Basalt
Granite
Mantle
Lithosphere
Asthenosphere
Outer core
Inner core

2. Seismic wave
What an earthquake produces

3. pressure A mass of rock pressing on an area
EX. The deeper down the greater the pressure

4. Crust
The layer of rock that forms Earth’s outer skin; both dry land and ocean floor

5. Basalt
A dark fine grained rock that makes up the ocean floor

6. Granite
A rock that is usually a light in color and has coarse grains which is the most amount of rock that makes up the continental crust

7. Mantle
A layer of hot rock that is divided into layers and nearly 3000 km. thick

8. lithosphere
The crust and the uppermost part of the mantle that is brittle rock.

9. asthenosphere
The soft hot layer under the mantle that is under more pressure that is less rigid than the lithosphere but still solid

10. Outer core
Layer of molten metal surrounding the inner core which is liquid

11. Inner core
A dense ball of solid metal (iron and nickel)