In your own words, describe the three main types of plate boundaries and explain how the tectonic plates are able to move (your answer should include correct use of the words 'lithosphere' and 'asthenosphere').

A convergent plate boundary is where one of the convergent plates will move beneath the other plate, a process known as subduction. This happens in the lithosphere. A second plate boundary is called a divergent plate boundary. Along these boundaries magma rises from deep within the earth and erupts to form new crust on the lithosphere. The third type of plate boundary occurs where tech tonic plates slide horizontally past each other. This is known as a transform plate boundary.