1a)
Map scale = 1:50:000
Map distance =20.5cm
Ground distance =20.5/1 * 50,000/10,000 * 50,000/100,000
20.5/1 * 1/4 =5.125km
1c
– farming due to presence of scattered grass
– fishing due to presence of rivers
-Transportation due to presence of roads network
-Trading due to presence of market
1d)
– The map area is well drained by river Owan
– The settlement avoid hilling area of the mapped area
– Road network are also seen to avoid the mountain area
– River valley are located on the hilling side of the mapped
area
– Deltain area are located at the southern part of the
mapped area

8a)
OROGRAPHIC RAINFALL
Diagram
FORMATION
It is formed when ascending air mass meet a barrier. The
air masses are forced to rise leading to rainfall in the
windward slope.
8b)
i)It leads to formation of rain fall
ii)It brings about cool and mild weather
iii)It reduces amount of sokar radiation but scattering
harmful ray.
3a)
Temperature is the degree of hotness or coldness of a body
or an object.It is measured with thermometer
3b)
As height or altitudes increases,temperature
decreases.hence for every 100metres of
ascent,temperature decreases by 0.65 degrees celcius or 1
degrees celcius for approximately 160metres of ascent.The
decrease in temperature with increasing elevation is called
lapse rate
3c)
Town A:
Temp=50C
Height=sea level
Town B:
Temp=?
Height=4000m above sea level
Recall 1C=160m
Tb=4000m
(Tb*160)/160=(4000*1)/160
Tb=25C
Therefore the temperature of town B is 25 degrees celcius

(4a)
Weathering is the gradual breaking down or
disintegration of rocks by either physical
(mechanical) or chemical process
(4b)
(i) Hydration
(ii) Oxidation
(iii) Carbonation
(4c)
This occurs in polar and temperate regions of
the world where rocks on high mountains with
cracks or joints collect water or snow in them.
When the temperature drops during the night
or winter, the water in the cracks freezes and
melts during the day or summer. Such repeated
freezing and melting widen and deepen the
cracks which eventually breakdown the rock.
The pieces of rocks which peel off from the rock
surface accumulate at the care of the mountain
to form screes.

5a)
1-water falls
2-Gorges
3-V.shape valley
4-Vertical erosion
5b)
Oxbowlake:It is usually at the lower course of a river due
to the deposition of sediments carried by the river.It is a
cresent shaped lakes formed by the running water through
a meadow reek.As the river wideans it becomes more
noticeable,the reek between two bend of the meadow
become reduced
9a
Draw map of Africa
9ai
-locate river nile and
zambezi
9aii
-the aswan high dam and
kariba dam
9b
-they provide employment
oppotunities -they provide
oceanic food
-they aid movement of
people from one place to
another
9c
-they are limited due to
their seasonal nature
-they are characterise due
to their highg dendritics
tricks
-they are swallow in
nature

(7a)
(i) Volcanic eruption
(ii) Earthquakes
(iii) Tornadoes
(7b)
(i) Air pollution causes impaired health such as
the irritation of eyes, lungs and skin cancer
(ii) It causes suffocation
(iii) It can cause accidents as a result of poor
visibility
(7c)
(i) Chemical waste should be discharged high
into the air through fume chambers
(ii) Industries should be sited away from
residential houses
(iii) Provision of filters or absorbers to reduce
pollutants from waste gases.
++++++++++++++++++++++++++++++

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Michael Ishola Sanni

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