YOU ARE REQUIRED TO ANSWER NUMBER 1 AND ANY OTHER THREE
Old side = 1:50,000
New side = 1:150,000
Old scale/New scale = 50,000/150,000 = 1/3
This implies that the map will be reduced by 3
Old length = 27cm
New length = 27/3= 9.0cm
RELIEF AND DRAINAGE OF THE MAPPED AREA:
The drainage pattern of the mapped area is dendritic. There is an irregular branching of the tributaries in many directions like the branches of a tree. The south western part of the mapped area is marshy, poorly drained and liable to flooding.
The highest point on the map is on 900ft while the lowest point is on 600ft. There is a pressure of the conical hill on the south western part of the mapped area.
(i)Outwash Plain; Also called a sandur, an outwash plain
is formed by glaciers. Such a plain is formed when a
glacier deposits sediments at its terminus. As a glacier
moves, it erodes the bedrock and carries the eroded
(ii)Till Plain; A till plain is also a plain formed by glacial
action. Such plains are formed by the deposition of
glacial till (unsorted glacial sediment). When a sheet of
glacial ice gets detached from the main glacier and
melts in place, the sediments are deposited on the
ground to result in the formation of a till plain.
(iii)Lava Field; A lava field can also be referred to as a
lava plain. Such a plain is formed by the accumulation
of layers of lava. The lava plains can stretch for miles
and are easily visible from the air or in satellite images
where they appear darker in color than the surrounding
(i)Plains has alluvial soil which make it fertile
(ii)Many rivers flows through plains which provide water.
(iii)Plains are also important in economic conditions.
(iv)Plains are flat therefore they used for human
-Unloading; This is the release of stress in a rock that produces expansion joints can cause exfoliation. In other words reduction in stress occurs when rocks previously buried deeply are exposed due to erosion of overlying rocks, or when ice sheets that bury rocks melt.
-Exfoliation: This is the term used to describe the peeling away of sheets of rock millimeters to meters in thickness from a rock’s surface due a range of physical and chemical processes during exhumation and weathering.
Environmental hazard simply refers to disasters which affect lives and properties within environment as a result of the action of man and other natural phenomena
(i)deforestation exposes the land surface to erosion
(ii)it increase evaporation and lowers the water table
(i)It lead to high losses of crops and livestock
(ii)drought Disturb plants life
(iii)it required the planting of low moisture requirement crops