The air releases its wetness content over the tropical regions creating a low-pressure region. The poles are the origin of dense air descending due to the high pressure. The descending of dense air toward high-pressure tropical zones results in hot dry winds. The resultant wind is devoid of moisture and blows over North Africa, North America and Middle East hence, the desert in the above regions (Concord, 2012).
The descending of glacier results in the creation of features. However, the process is gradual. Glaciers create feature by scouring the earth and depositing material in diverse areas. They drag along rocky material, which is embedded in the glacier. The rock particles scour the earth surface creating certain feature such as horns and arêtes. Additionally, if the gravel emanating from glaciations is deposited it is regarded as moraine. For glaciations to generate distinct features, massive quantity of ice is necessary. However, the receding ice caps have resulted in reduced glaciations (Pidwirny, ...Show more