A volcano is an opening in the Earth's crust that allows magma, hot ash and gases to escape. Composite volcanoes are the most common type of volcano. They can have violent eruptions and can grow ...

the Earth's crust and plate boundaries. Find out about collision zones, tectonic plates and how a fold mountain is formed. Rock types - CCEA Rocks found on the surface of the Earth can reveal a ...

Planet Earth is made up of three different layers, which are the crust, the mantle and the core. The crust is the outside layer of the planet and it's made of solid rock - there are two types of ...

All of these processes result from plate tectonics, the movement of enormous chunks of Earth's crust. This movement may be why life exists here. Earth is the only known planet with plate tectonics ...

Stable parts of the Earth's crust may not be as immovable as previously thought. While much of the crust is affected by plate tectonic activity, certain more stable portions have remained ...