WHAT SHAPES THE COASTS? Coastlines are constantly changing: they are either being eroded or built up. The waves are very powerful and can remove a large amount of material from a coastline, specially during a storm. The sand and pebbles removed from the coastline are carried...

River start on the top of hills as small streams channelling  the rainfall or as a spring releasing ground water. They begin to cut at and change the landscape on the way to the sea. In the highlands the water can move...

Over 10,000 years ago about a third of the land surface was covered by ice. Today a tenth is still covered in ice. Ice sheets can cover very large areas and can be very thick. The world's largest ice sheet covers most of &nbs...