Tectonics - Structure of earth
- Created by: Emily Birt
- Created on: 11-03-13 19:52
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- Tectonics
- The structure of the earth
- Outer core
- Temperatures of around 55oo
- Mantle
- Convection currents in the mantle
- Crust
- Around 0-70 km thick
- There are two types of crust
- The less dense continental crust
- Outer layer of the earth
- Plates
- Outer core
- The two different types of crust
- Oceanic Crust
- This is the newer crust - most is less than 200 years old
- Denser than continental
- Can sink/can be renewed/destroyed
- Continental crust
- cannot sink/cannot be renewed or destroyed
- Oceanic Crust
- The structure of the earth
- Inner Core - centre of the earth
- The structure of the earth
- Outer core
- Temperatures of around 55oo
- Mantle
- Convection currents in the mantle
- Crust
- Around 0-70 km thick
- There are two types of crust
- The less dense continental crust
- Outer layer of the earth
- Plates
- Outer core
- Solid iron and nickel - temp of around 6500
- The structure of the earth
- Engine room of the whole earth
- Solid iron and nickel - temp of around 6500
- Surrounds inner core - and is liquid iron and nickel
- This is the largest section of the earths structure
- Its made of a semi molten rock called magma
- Cause plate movement (continental drift)
- The denser oceanic crust
- Older - most continental crust is older than 1500 years old
- Continental crust
- cannot sink/cannot be renewed or destroyed
- It is less dense
- Continental crust
- The point at where two plates meet is called a plate boundary
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