Save guides, add subjects and pick up where you left off with your BBC account. The Earth has a layered structure made up of the core, the mantle and the crust. Different elements are present in ...

Cross-section of the Earth's interior: crust, upper- and lower-mantle, and outer- and inner-cores. Journalists may use this image only with appropriate credit.

A volcano is an opening in the Earth’s crust that allows magma, hot ash and gases to escape. The water cycle works by using the energy of the Sun to exchange water from oceans and lakes to the ...