FREE 2016 NECO MAY/JUNE EXAMINATION EXPO AND ANSWERS 24HOURS BEFORE EXAM

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Effect of earth revolution
2a
i)UP [NORTH]: West DOWN [SOUTH]: East (On
Surface)

ii)Northern Hemisphere: Deflected to the right
(clockwise)

iii)Southern Hemisphere: Deflected to the left
(counter-clockwise)

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3a)
metamorphic rocks are the changed rocks,it is formed from the pre-existing igneous or sedimentary rocks which have been changed as a result of heat and pressure eg marble,gnesis,schist,graphite.

3b)
i)mountains-are formed when rock are subjected to contractic or compressond forces which are chemical,physical or other factors
ii)plateaux-this is formed when rock are subjected to mass wasting or mass movement
iii)plains-rocks helps to form plains when sedimentary are bedded or stratified

3c)
i)it serves as sources of fuel
ii)it is used for construction purpose
iii)it is used for ornamental eg marble
iv)it serves as sources of metal
v)it serves as a raw materials for the industries
vi)it serves as source of food nutrient
vii)they help in soil formation


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