Tectonics
- Created by: shoskins02
- Created on: 09-11-17 17:14
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- Tectonics
- Earths Structure
- The Crust
- A layer of solid rock 5-90km thick
- Oceanic
- 200 m years old
- Thinner, more dense
- Can be destroyed
- Continental
- Billions years old
- Thicker, less dense
- Cannot be destroyed
- Outer layer of Earth
- Mantle
- Semi solid molten rock
- Magma
- Can reach 5000 centigrade
- Surrounds core
- Semi solid molten rock
- Core
- Inner
- Solid ball of nickel and iron
- As hot as the sun
- Outer
- Liquid iron
- 5000 degrees
- Pressure makes it solid
- Inner
- The Crust
- Plate margins
- Destructive
- Oceanic and Continental move towards each other
- Oceanic is destroyed as it sinks below continental
- Volcanoes and mountains produced
- Constructive
- Two plates move apart
- Magma rises
- Causes volcanoes
- Collision
- Two continental pushed together
- Cant destroy each other so fold up
- Create mountains and earthquakes
- Conservative
- Plates moving past each other
- Different speeds, same or opposite direction
- Not smooth, pressure builds
- When it lurches pressure breaks
- Causes earthquakes
- Plates moving past each other
- Destructive
- Plate Movement
- Convection Current
- 1. Core heats mantle
- 2. As the heat rises it is pushed sideways as it cant get through the crust
- Convection Current
- 1. Core heats mantle
- 2. As the heat rises it is pushed sideways as it cant get through the crust
- 3. When it cools the hot air drops
- This is a constant cycle
- Causes movment
- This is a constant cycle
- 3. When it cools the hot air drops
- 2. As the heat rises it is pushed sideways as it cant get through the crust
- 1. Core heats mantle
- 3. When it cools the hot air drops
- This is a constant cycle
- Causes movment
- This is a constant cycle
- Convection Current
- 2. As the heat rises it is pushed sideways as it cant get through the crust
- 1. Core heats mantle
- Continental Drift
- Continents fit together like a puzzle
- Similar fossils have been found on other sides of world
- The animals cant swim or fly
- Rock types are also similar around the world
- Convection Current
- Hazards
- Volcanoes
- Found at destructive and constructive
- When a plate is destroyed it turns to magma
- This magma rises
- The magma then erupts
- This is a volcano
- Magma is called lava on the surface
- Earthquakes
- Found at all boundaries
- Caused by the tension being released
- This sends up shockwaves
- Measured in magnitude
- Epicentre is above focus
- Stronger at focus
- Volcanoes
- Earths Structure
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