Welcome to Waec 2021 Physical Geography Answer
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“”WAEC 2021 Practical and Physical Geography ANSWERS””
(i) The roads are motorable
(ii) The roads are connected in the Central point of the mapped area
(iii) The roads are easily accessible
(iv) The roads are on highland area of the mapped area
(Pick Any Three)
(i) It is accessible by main road
(ii) It has Four schools, Church and Marked
(iii) It has railway liking it
(iv) It is located close to the sea
Hydraulic action: The wearing down of cliff/headland through the impact produced by the sheer force of the waves against obstacles along the coast. In other words the sheer force of water crashing against the coastline causing material to be dislodged and carried away by the sea. And the Compression occurs in rocky areas when air enters into crack in rock.
Corrasion: The wearing down of the base of cliff/headland using the impact of the materials carried along by waves. In other words the strictly mechanical wear of bedrock by moving detrital and other materials during their migration downslope under the influence of gravity, and their further transportation by erosional agencies such as running water, moving ice, or wind.
ALTITUDE: At the higher altitudes , the amount of atmosphere decreases and as the result there is less water vapour in the air. The atmosphere absorbs less heat and therefore the temperature at higher altitude drops.
DISTANCE FROM THE SEA: When the sea is cooler than the land in summer, it lower the temperature of coastal place. However , during the winter the sea is warmer than the land and keep coastal places warmer by moderating the winter temperature.
SLOPE AND ASPECT: in the temperate areas, the sun is low angle in winter, this will affect the temperature of slopes that face north to south. in north hemisphere, the south facing slope receive greater concentration of solar radiation and usually warmer than the north facing slope.
granite = gneiss
Clay = Slate
Shale = schist
Limestone = Marble
(Pick Any Four)
(i)Resistance: Metamorphic rocks are generally more resistant than most sedimentary rocks
(ii)Lustres: Metamorphic rocks are crystalline while sedimentary rocks are non-crystalline
(iii) Permeability: Sedimentary rocks are more permeable while Metamorphic rocks are more impervious.
(iv)Mineralogy: Metamorphic rocks contain non-ferrous minerals while sedimentary rocks contain hydrocarbons
(v)Fossils: The fossils in Metamorphic rocks have been destroyed by heat and pressure while sedimentary rocks have beautiful fossils
Environmental balance refers to the ways of recycling matter and the flow of energy within an ecosystem in order to ensure continuous supply or availability. Environmental balance is achieved through water cycle,carbon cycle,mineral nutrient cycle,nitrogen cycle,food chain and web
(Pick Any Three)
(i) water helps to dissolves plant nutrients solutions for easy absorption by plant
(ii)All living organisms requires water for normal life processes
(iii)Water is an important agent for weathering of rocks
(iv)water is also required by plants for photosynthesis and transpiration by plants aids Cooling of the plants
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