Neco 2018 geography theory and obj answers

GEOGRAPHY OBJ:

1-10: BBDEADACAA

11-20: DCDDCEBCAC

21-30: AEECADBBAD

31-40: BADDDCEECE

41-50: DBACACACCB

51-60: EDADACACCC

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GEOGRAPHY
SECTION A
(1a)

(1b)
Length of the main road
=22/1*50,000/100,000
=22/1 * 5/10 =2
=22*1/2
=11km
(1c)
the drainage pattern of the mapped area is the south east direction of the rivers
(1d)
(i)lumbering- because of high trees
(ii)fishing- because of rivers

(2) (YEAR 2003)
COUNTRY|COCOA PRODUCE|DEGREES |
_____________________________
P |200 |42.35°
Q. | 400 |84.71°
R. | 800 |169.4°
S. | 300 |63.53°
——————————————— total=1700.
Total =360°
2b) kindly use compass for accurate drawing of a pie chart use the above degrees

SECTION B COMPLETED


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(3a)
(i) The Intermontane plateau: is when a plateau is surrounded by mountains on all sides, it is refers to an Intermontane plateau. Some examples of the Intermontane plateau include the Tibetan plateau and the Bolivian plateaus.
(ii) The Piedmont plateau: a Piedmont plateau is located close to a mountain on one side. Some good examples of
Piedmont plateaus are the Malwa plateau in India, the Patagonian plateau in Argentina and the Piedmont plateau in America.
(iii) The Continental plateaus- when a plateau is surrounded by oceans or plains, it is refers to as continental plateau. Examples of continental plateaus include the plateaus of Western Australia and Africa.
(iv)Dissected plateaus : These plateau are highly eroded plateaus cut by rivers and broken by deep narrow valleys.

(3b)
(i)Plateaus are very good sources of minerals such as Iron, copper, gold, diamonds, Manganese, coal, etc.
(ii) Areas that have plateau also have waterfalls as river falls from a great height of the plateau
(iii) Although plateaus are not very good for agricultural activities due to hard rock formation, hence, agricultural activities can be carried out at the base of the plateau where lava soils have deposited.
(iv) Plateaus that are formed from the lava of volcanoes have very fertile soil, making them useful for agricultural act.

=================================
(6a) types of delta are
(i) Arcuate Delta e.g Nile delta
(ii) Bird-foot delta e.g mississippi delta

(6b)
(i) The river must have a larger load so it must originate from an area with high erosive power.
(ii) The course of the river should be free from obstacles which act as filters.
(iii) The river should be slow flowing on entering into the sea to prevent washing of sediments into the sea.

(6c)
(i) They are major agricultural production centers and population centers
(ii) They serve as Tourist centre.
(iii) They can provide coastline defense and can impact drinking water supply
===============================



(7a)

Environmental problems or hazards are disasters which affects lives and properties as a result of the action of man and other natural phenomenon.



(7b)

(i)Flooding

(ii)Desert Encroachment

(iii)Drought

(iv)Soil Erosion 

(v)Deforestation



(7c)

(1) climatic changes: is a change in the statistical distribution

of weather patterns when that change lasts for an extended period of time. 

(2) overgrazing occurs when plants are exposed to intensive grazing for extended periods of time, or without sufficient recovery periods. 

(3) bush burning: is the act of setting forests, weeds and grasses on fire.



(7d)

(1) afforestation

(2) irrigation

(3) rotational/controlled grazing


5a)
Drawing - UPLOADING
5b)
i)A great circle is the shortest path between two points along the surface of a sphere.
ii)great circle is the intersection of the surface with a plane passing through the center of the planet.
iii)They cross successive meridians at different angles.
5c)
i)Great circle are of importance to navigation and aviation.
ii)The shortest route between any two places is along the arc of the great circle which passes through them.
iii)Ships crossing the vast oceans and aircrafts follow the Great circle route in order to save fuel and time.

(8a)
i)Encroachment : More migration lead to
less availability of land which lead to higher economic value of land.
ii)Pollution: Explosive increase in the urban population without
corresponding expansion of civic facilities such as lack of adequate infrastructure for the disposal of waste results in waste clogging the
natural channels and storm water drains.
iii)Illegal mining activities: Illegal mining
for building material such as sand and quartzite both on the catchment and on the bed of the lake have extremely damaging impact on the water body.
iv)Interference in drainage system:
Drainage congestion caused by badly
planned construction of bridges , roads , railway tracts, hampers the
flow of water and the result is flood.
(8b)
i)Flooding leads to loss of human life
ii)Flooding leads to damage to property
iii)It leads to destruction of crops
(8c)
i)Improving Drainage Improving water drainage helps control floods by facilitating easy flow of excess water, especially in urban areas during flash floods.
ii)Building Dikes and Levees Dikes and levees are flood-control structures built to fight river flooding and water surges.
iii)Building Canals; Canals are artificial water channels that can be crucial to flood prevention. Canals facilitate control of water levels passing through, and form linear reservoirs and water locks.
iv)Harvesting Rain Water Harvesting rainwater involves collecting and storing rainwater and can not only prevent floods, it can also curb urban water scarcity.


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