3 erosion processes are explained:

• Freeze thaw action/frost shattering
• Plucking 
• Abrasion

Formation of a Corrie

• You may have to draw a diagram (possibly a before, during and after)
• Provide an example - Red Tarn, Lake District.
• Bergschrund and could mention the compressive and extensive flow.

Formation of an Arete

• Be able to describe an arete - when two corries back into one another, the knife edged ridge in between is the arete. A corrie is formed when snow accumulates in north facing hollows...
• Striding Edge, Lake District

Formation of a Pyramidal Peak

• Be able to describe a pyramidal peak - when three or more corries back into one another, the peak at the top is the pyramidal peak. A corrie is formed when snow accumulates in north facing hollows... 
• Helvellyn, Lake District