Waec G. C. E Geography Practical & Physical Questions & Answers Now Available

TUESDAY 15TH SEPT 2015
Geography 3 (Practical & Physical)
2.00pm - 3.50pm

ANSWERS 


(1)
diagram
(a)
old scale= 1:50,000
reduction= 1/3
new scale= 1:150,000
(b)
the relief area is characterised by highlands which have
contour lines of equal intervals of 50m. the settlements are
located along minor roads and rivers along the low land
(c)
land use types identified in the mapped area
(i) land for agriculture
(ii)land for settlement
(iii)lland for mining
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3b)
- it represent 30% of the earth surface
- its the outermost layer of the eart
- its the solid portion of the earth
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4) Landforms associated with extrusive. Volcanicity
1)Composite cones
Ii) Lava domes
Iii) Ash and cinder cones
4b) xteristes and mode of formation of a sill
Sill result when an intrusion of magma is made horizontally
along the bedding planes of sedimentary rocks
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5a)
Mass wasting refers to the downslope of rocks, regolith and soil under the force gravity .

5b)
four factors are
i) gravity or nature of slope. Gravity is the main cause of mass wasting. Gravity is the force which pull materials downslope. On the steep slopes loose and disturbed particles of rocks respond by moving downward .  uplands with steep gredient enhance rapid mass movement while slow movement occurs in gentle sloping areas.

ii)the nature of materials. Large scale and rapid mass wasting is caused by saturated loose and bulky rock materials while dry less bulky and small rock particles produce small scale and slow mass wasting  .

iii) activities of man. Human activities which include mining , movement of heavy duty truck , construction , etc affect the rate and character of mass wasting.

iv) crustal instability. Mass wasting is more common in areas of instability caused by earthquakes , trains , heavy duty trucks  set poorly consolidated rock moving downward. Earthquakes upset the balance and trigger sudden movement.

5c)
I. Loss of life 
ii. Destruction of land
iii. Destruction of communication lines
Iv. Destruction of settlement

(6a) Igneous rocks are formed by the cooling
and solidification of molten rocks called
magma.

6b)
I. They are crystallined
ii. They are non- stratified
iii. They have no bedding plane
Iv. They are non fossilized
V. They are hard as compare to sedimentary rock.
Vi. They are usually hard and impervious

6c)
importance of rocks to mankind are
I. Source of soil. Rocks serve as source of soil for farming
Ii. Source of food. Rock salt serves as an important source
of food
Iii. Source of water . man get water from percol water that
is retained by non permeable rocks called aquifer
Iv. Source of fertilizer. Potash, phosphate are raw
materials for production of fertilizer
V. Industrial raw materials. Example limestone serves as
raw material to cement factories

7a)
i)Sahara (North Africa)
ii)Great australian desert(Australia)
iii)High rate of evaporation
iv)Relative humidity is very low

7c)
i)Possession of long roots to search for water in the soil
ii)Presence of few or no leaves at all to prevent
transpiration
iii)Possession of thick succulent stems
iv)Some shed their leaves during drought
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8a)
Atmospheric resources are those are those elements such as
wind, water, sunlight, and gases, which are of benefit to man
, animals, and plants

8b)
Atmospheric gases ( nitrogen, oxygen, co2, water vapour , ozone
layer
(i) wind
(ii) rainfall
(iii) solar energy

8c)
i)oxygen supports animals life
ii) used by plants and animals for respiration
iii) Co2 required by plants for photosynthesis
iv): ozone layer acts as a blanket to the earth
v) rain provides water for human consumption and agriculture

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