OVERVIEW: Sum of Sections is 100% Respond to FIVE (5) of the SIX (6) numbered topics below for 20% each. Cross out or otherwise clearly indicate which that you chose NOT to answer otherwise only the first five (5) will be scored.
1 GLACIERS: (a) Discuss the formation and movement of a glacier.
Glaciers are formed when snow is accumulated at the same place for a long period of time. This process takes place throughout the year forming ice. Subsequent layers of snow are formed each year, burying the older snow layers and compressing the. Re-crystallization of those older layers of snow then follows due to the pressure from the the new layers. This forms some grains which are small in size. With time, the grains grow smaller and the air spaces between them become smaller. This makes the snow to compact and become more dense. After some period, the snow turns into firn which is a stage between snow and glacier. Over a period of time, large crystals of ice are formed which make the air pockets between