2017 WAEC GCE Practical and Physical Geography Answers

2017 WAEC GCE Practical and Physical Geography Answers

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4a)
Solar system:This consist of the sun and the nine planets.The sun is at the centre of the solar system and all other planets revolve around it in their orbit
4b)
i)Merury:
-It is the smallest,hottest and closest planet to the sun
-It takes 88 days for mercury to go round the sun
-It has no sattelile of its own
ii)Earth:
-It is the only planets which support the existence of plants and animals
-It take about 365 and quater days to complete its orbit
-It has one natural satellite called the moon which revolves eastwards around the earth in every 27days

6a)
Delta is a triangular tract of sediment deposited at the mouth of a river, typically where it diverges into several outlets.
6b)
-The presence of a large catchment, or drainage, basin (the area where all run-off water drains to the river). The top 30 river deltas all have catchment basins in excess of 1,000,000 sq km.
– They all are at the mouth of large river systems that carry large quantities of clastic sediments (soils or portions of rocks that have been moved by water from where they formed).
-They are not near geologically active coastlines. In order to have a large catchment basin, a very complex tributary system is necessary. These long, complex systems take a long time to develop, so they are very rarely situated on tectonically active coasts.
6c)
-The river must have large load. This will be possible if there is active erosion in the upper and middle stages
-There should not be extensive deposition in the middle stage e.g. presence of lake in between or high evaporation rate (first)
-The river’s load must be deposited faster than it can be removed by the action of currents and tides.

(7a)
(i) Temperature
(ii) Humidity
(iii) Precipitation
(7b)
(i) Topography
(ii) Effects of geography
(iii) Earth’s surface
(7b)
(i) Topography
(ii) Elevation or Altitude effect
(iii) Prevailing global wind patterns
(7c)
(i) Climate changes involving temperature affects man. Warmer temperatures make conditions more conducive to growing crops, which allows farmers to produce the food necessary to feed people and livestock. Adverse weather conditions, such as heat waves, droughts, flood and extreme cold, have a negative effect on agriculture, which reduces the available food supply.
(ii) Climate changes such as heat waves and flood can seriously impact health. These changes can also produce unhealthy water and limit or even deplete a region’s food supply.
(iii) climate changes involving the planet’s atmosphere can negatively affect human health.

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