1. geology
Chapter 10

2. Layers of the earth

3. Biosphere Layers Atmosphere - air layer (80% Nitrogen)
Lithosphere - rock layer
Hydrosphere - water layer (75% of earth)

4. rocks are made up of minerals Three types:
1. Sedimentary - cemented rock
2. Igneous - solidification of magma
3. Metamorphic - heat and pressure

5. Mineral test Hardness - based on Moh’s hardness scale
Streak Test - color of streak
Chemical Properties - fizz with acid (limestone)

6. Build Up activites volcanoes (folding) mountains (folding)
laying down sediment (deposition)

7. Break down activities Weathering - breaking down of rocks
Erosion - moving broken down rocks
These can occur due to:
1. wind
2. water
3. glaciers

8. types of weathering Physical - rock is not changed, just made smaller
Chemical - rock is changed to a new substance

9. natural disasters Earthquakes - movement of plates Hurricanes Floods
Tornadoes

10. plate tectonics
Moved by convection currents under mantle

11. isolines