1. The Dynamic Earth
Chapter 3, sec. 1

2. Earth as a System Geosphere = soil, rock and layers of inner Earth
Atmosphere = mixture of gases
Hydrosphere = water on or near the Earth’s surface
Biosphere = where life exhists

3. The Geosphere Most is located in Earth’s interior
Use seismic waves to learn about interior
-wave is altered by the material it travels through

4. Geosphere
3 chemical layers
Crust
Mantle
core

5. Geosphere Crust Thin outer layer Composed of light elements
Less than 1% of mass
Thinnest layer (5km – 8km)

6. Geosphere Mantle Beneath the crust 64% of Earth’s mass 2,900 km thick
Made of rocks

7. Geosphere Core Innermost layer Densest elements Radius of 3,400km
Makes up 1/3 of mass

8. Geosphere 5 physical layers Lithosphere Asthenosphere Mesosphere
Outer Core
Inner Core

9. Geosphere Lithosphere Outer most layer Cool rigid layer
15km – 300km thick
Includes crust and upper mantle
Tectonics plates

10. Geosphere Asthenosphere Beneath lithosphere
Plastic, solid layer of the mantle
Made of rock the flows
Allows movement of tectonic plates

11. Geosphere Mesosphere Beneath asthenosphere “middle” sphere
Lower part of the mantle

12. Geosphere Outer Core Dense liquid layer Outer shell of the core
Nickel and iron

13. Geosphere Inner Core Dense, solid Iron and nickel 4,000 °C to 5,000 °C
Solid due to pressure