1. The Dynamic Earth

4. The Earth as a System Geosphere – rock Atmosphere – air
Hydrosphere – water
Biosphere – living things

5. Consists of rock, and the soil and sediments on the surface
The Geosphere
Consists of rock, and the soil and sediments on the surface

6. Composition of the Earth
Crust - thin top layer, where life exists
Mantle - middle layer, making up ½ of the inner earth.
Core - extremely hot innermost layer, mostly composed of iron

7. Structure of the Earth 5 Layers
Lithosphere - crust and upper most solid mantle
- divided into tectonic plates
2. Asthenosphere - solid rock that flows slowly
- convection currents happens here
Mesosphere – upper, middle and lower

8. Structure of the Earth 5 Layers
Outer Core - liquid layer
5. Inner Core - solid, very dense

11. Tectonic Plates
The lithosphere is divided into plates that glide across the asthenosphere.
Major plates:
Pacific
North American
South American
African
Eurasian
Antarctic

13. What happens when the plates move??

15. Tectonic plates collide, separate, or slip past one another.
Earthquakes, volcanic eruptions, and mountain – building are all events that occur at the boundaries of tectonic plates.

20. Erosion
The removal and transport of surface material is called erosion.
Water and wind can change the landscape.