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2020 WAEC GCE/WASSCE PRIVATE SECOND SERIES GEOGRAPHY PRACTICAL QUESTIONS/ANSWERS VERIFIED EXPO

(1a and 1c)


(1d)


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(4a)

(i)Solution – minerals are dissolved in the water and carried along in solution.

(ii)Suspension – fine light material is carried along in the water.

(iii)Saltation – small pebbles and stones are bounced along the river bed.

(4b)

(i)Hydraulic action: This process involves air particles finding their way into the cracks of rocks. This then causes air particles to compress which adds pressure, causing rocks to break away and erode.

(ii)Attrition: The velocity of the river causes rocks to collide and break fragments off one another. This causes rocks to become smoother and more rounded. You will find smaller more rounded rocks further downstream as velocity increases.

(4c)

(i)the predominance of active vertical and lateral erosion in the upper course of a river leading to the generation of sedimentary deposits

(ii)sedimentary deposits are conveyed downstream via the water of the stream

(iii)the existence of tideless coast which ensures sedimentary deposits are not swept to the bottom of oceans and seas

(iv)shallowness of the sea that ensures sediments are not packed to depth far beneath the surface

===========================================

(5a)

Climate is the long-term pattern of weather in a particular area. Weather can change from hour-to-hour, day-to-day, month-to-month or even year-to-year. In other words region’s weather patterns, usually tracked for at least 30 years, are considered its climate.

(5bi)

Clouds formation are visible accumulations of tiny water droplets or ice crystals in the Earth’s atmosphere. Clouds differ greatly in size, shape, and color. They can appear thin and wispy, or bulky and lumpy. In other words Clouds usually appear white because the tiny water droplets inside them are tightly packed, reflecting most of the sunlight that hits them. White is how our eyes perceive all wavelengths of sunlight mixed together.

(5bii)

Temprature inversion is a phenomena in which temprature increases with increasing altitude. It is totally opposite to lapse rate according to which at rate of 6.5 degree C per Km temprature decreases. Temprature inversion happens in valley- hill combination and polar region , where warm air mass settles over cold air mass. In other words condition in which the temperature of the atmosphere increases with altitude in contrast to the normal decrease with altitude. When temperature inversion occurs, cold air underlies warmer air at higher altitudes.

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(6a)

A plain is extensive area of level or gentle undulating land, usually a few meter above the sea level

(6bi)

Erosional plain; These plain are formed by the agent of denudation such as river, wind, rain, glacier and ocean waves which wear out irregular rock surface and smoothen them into plains known as erosional plains

(6bii)

Dissected plateau; This plateaus are formed due to weathering and agents of denudation such as running water, winds, ice, etc which wear down a large and extensive plateaux into remainant structure of irregular surface called dissected plateau

(6c)

(i)It support concentration of manufacturing industries

(ii)River in plain provide water for drinking and transportation.

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(7a)

environmental balance is the stability in the amount of matter and energy within an ecosystem which guarantees continuous supply or availability of matter and energy.

(7b)

(i)Food chain

(ii)Food web

(iii) Nitrogen cycle

(7c)

(i)By introduction of new species

(ii)By the mass of humanity marches through time is greater than that of any other species

(iii)By terraform the Earth for buildings, marinas, houses, farming etc

(iv)By the natural things we dot Just like birds build nests and beavers build dams, humans build other things.

(v)By polluting indispensable resources like air, water, and soil which requires millions of years to replenish. Air is arguably the most polluted.

===========================================

(8a)

(i) Temperature

(ii) Topography

(iii) Atmosphere Pressure

(8b)

(i)Do not place a rain gauge under trees or roofs to avoid extra collection of water.

(ii)Prevent it from any obstruction.

(iii)Place it on a raised fixed platform to avoid splashing water from entering.

(8c)

(i)it serve man as means of job creation

(ii)It help avoid the runaway costs of climate change

(iii)It Enhancing national and global security of man kind.

Posted by on 21st November 2020.

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Categories: Waec Gce

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