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 ...

Just scatter crushed rock far and wide. It sounds simple: rock mops up carbon dioxide – it’s a slow but significant part of the carbon cycle – so if we speed up natural weathering we could ...

This is a simplified illustration of a stage in the erosion process. ... Developing ideas about the rock cycle. Over time there have been lots of different theories about the age of the Earth.