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NECO 2019 GEOGRAPHY OBJ AND THEORY VERIFIED ANSWER

GEOGRAPHY-OBJ!

1BBDBABEEDA

11BDEEEDACAD

21BCBEEBDAEC

31AAEABDBBED

41DCADDAACED

51AADCEEACEB

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(1) CLICK HERE TO SEE ANSWER
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(3a)
(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 sediments downstream. 
 
(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 landscape.
 
(3b)
(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 settlement.
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(5ai)
-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; is the term used to describe the peeling away of sheets of rock millimeters to m eters in thickness from a rock’s surface due a range of physical and chemical processes during exhumation and weathering.
 
(5aii)
Action of Plants and animals; can be agents of mechanical weathering. In other words the seed of a tree may sprout in soil that has collected in a cracked rock. As the roots grow, they widen the cracks, eventually breaking the rock into pieces.
(5b)
(i)Climatic factors
(ii)Earthquake
(iii)Erosion 
(iv)Volcanoes
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(6a)
(i)Abrasion or corrasion – This is when large pieces of bedload material wear away the river banks and bed.
 
(ii)Attrition – This is when the bed load itself is eroded when sediment particles knock against the bed or each other and break, becoming more rounded and smaller.
 
(iii)Hydraulic Action – This is when the force of water erodes softer rock.
 
(6b)
(i)wider valleys
(ii)shallower valleys
(iii)meanders
(iv)oxbow lakes.
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(7a)
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
 
(7b)
(i)deforestation exposes the land surface to erosion 
(ii)it increase evaporation and lowers the water table 
 
(7c)
(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
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(8a)
Map digitization involves the extraction of data values from graph. It involves importing the graph from a file, defining the axis system and digitizing it automatically or manually 
 
(8b)
(i) Land surveying : This is the process by which measurement of the land is made and then represent such measurement by tables, places or layout for specific purposes.
 
(ii) Map scanning : Exiting maps of various scales containing different types of information about the area of interest are scanned. The information of these maps can be fed into a G I S 
 
(iii) Tabular d4ta : This involves the use of speed dat4 arranged in tables and such dat@ are analyzed and processed by computer in order to generate useful information 
 
(iv) Field investigation : Computerized information systems for d@ta management may be needed during emergencies.
A dat4base is operational in this case
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Posted by on 10th June 2019.

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