chemistry - the earth

There are 4 parts to the earth, the core, the lower mantle, the upper mantle and the crust. But scientists think of the earth in spheres.

The lithosphere is made up of the upper mantle and the crust and it is about 80km thick. It is broken into plates which are called techtonic plates.These plates are able to move a little bit each year. It is also mainly made up of silicates which are compounds of silicon and oxygen and other elements.

The hydrosphere is made up of all the oceans and rivers in the world and it covers about 2 thirds of the globe…