Tectonic Plates and Fold Mountains

At the Earth's centre there is a ball of solid iron and nickel
- This is called the Core
Surrounding the core is the mantle
- This is a semi-molten rock that moves very slowly
The outer layer of the Earth is the crust
- It is very thin - approximately 20 km thick
The crust is divided into many slabs called tectonic plates which 'float' on the mantle
- Plates are made of two different types of crust - continental and oceanic
  - Continental crust is thicker and less dense
  - Oceanic crust is thinner and more dense
The plates are moving because the rock in the mantle beneath them is moving
The places where the plates meet are called plate boundaries or margins

There are three types of plate margin:
- Destructive Margins - where an oceanic plate meets a continental plate, the denser oceanic plate is forced down into the…

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