The Earth's surface is moving about all the time. There are all over the surface, and the surface is broken up into a number of interlocking plates, like a jigsaw puzzle. The plates are moving about very , about the rate at which your finger-nails grow. The plates are carried about on convection currents which rise from the centre of the Earth.

At the boundaries, there are [?] and earthquakes shake the ground.

There is a lot of evidence for the changes in the Earth's surface. For example, Mount , the tallest mountain in the world, was once at the bottom of a shallow, warm sea. The rock is [?] and you can find fossils. The movement of the continents results in building.

The German Geologist, Alfred Wegener, suggested that there was once a giant super-continent, called Pangea.

In the middle of the Atlantic, [?] wells up through fissures in the Earth's at the mid-ocean . This is pushing Europe away from the Americas.