Save guides, add subjects and pick up where you left off with your BBC account. The rocks on Earth are constantly changing due to many different processes. There are three main types of rock, with ...

The Rock Cycle is Earth's great recycling process where ... The three types of rocks above can each form one another by melting or erosion and subsequent lithification. This process helps to ...

Sedimentary rocks are made up of pieces of older rocks (igneous, metamorphic, and sedimentary) and organic remains (shells, bone, etc.). When rocks break apart from erosion they are transported by ...