VULCANICITY OR VULCANISM
Vulcanicity is formed when molten rock or magma forces its way into planes of weakness or vent of the earth’s crust to escape quietly or explosively to the surface. The magma, while moving through the vent to the earth’s surface…
RAINFALL
Rainfall is defined as the release of excess condensed water vapour in the atmosphere into the earth. Rainfall is the most important form of precipitation. On maps, lines used to join places having the same average annual rainfall are called…
PLANTATION AGRICULTURE IN WEST AND EAST AFRICA
Plantation agriculture is defined as the cultivation of certain crops on large area of land or plantation. CHARACTERISTICS OF PLANTATION It involves the cultivation of only one type of crop on a piece of land (i.e. monoculture). It requires…
ACTION OF WAVES IN COASTLANDS
The action of wave as an important agent of erosion, transportation and deposition of materials is confined to the coast of seas and oceans. The rate of marine erosion depends on the nature of the rocks, the amount of rock…
ACTION OF GLACIERS IN TEMPERATE REGIONS
The action of glacier as an important agent of erosion, transportation and deposition of materials is confined to mountainous and temperate regions of the world. TERMS ASSOCIATED WITH GLACIERS Ice: This refers to solid form of water, resulting from…
ACTION OF WIND IN DESERTS
The action of wind is dominant in deserts and other semi-arid regions of the world. Deserts which are associated with aridity (dryness) are caused by low rainfall, high temperature, cold currents and high evaporation rate. About 1/5 of the world’s…
EFFECTS OF RUNNING WATER
Running water can be defined as the natural movement of water in a certain direction. Running water is one of the most important agents of denudation. Rivers are involved in erosion, transportation and deposition of materials. RIVER A river…
PLATEAUX
Plateaux are elevated upland. They have extensive flat or level surface which usually descends sharply to the surrounding lowland. It has gentle slopes and is often referred to as table lands because of their flat or level surface. Plateaux are…
PASTORAL FARMING IN WEST AND EAST AFRICA
Pastoral farming is defined as the system of farming in which livestock animals like cattle, sheep and goats are reared either for food or for sale. TYPES OF PASTORAL FARMING There are two types of pastoral farming. These are:…
FRUIT FARMING IN THE MEDITERRANEAN REGIONS OF AFRICA
Fruit farming is defined as the type of farming in which farmers cultivate mainly fruit crops either for domestic, industrial or commercial purposes. It is regarded as Orchard farming. MAJOR AREAS OF FRUIT FARMING In North-West Africa: The areas…
WORLD VEGETATION
Vegetation is defined as an association or group of plants growing together in a particular habitat or environment. FACTORS AFFECTING VEGETATION Factors affecting vegetation can be grouped into four major categories. These are: CLIMATIC FACTORS High temperature with low…
IRRIGATION AGRICULTURE IN THE NILE BASIN AND THE NIGER BASIN
Irrigation agriculture is the type of agriculture which involves the artificial application of water to soil or land for farming purposes. Irrigation is mainly practiced in areas where there is insufficient rainfall like in Egypt and Sudan (Nile Basin) which…
WIND
Wind is defined as air in motion and it has speed and direction. In other words, wind is the horizontal flow or movement of air masses on the earth’s surface. Wind ranges from simple, light and comfort breeze to chaotic…
VEGETATION OF NIGERIA
The vegetation in Nigeria can be grouped into three major zones. These are: The forest Zone or Vegetation: This forest zone or vegetation contains mainly trees and has the following forest belts. Mangrove swamp forest (salt and fresh water swamp).…
CLOUD COVER AND SUNSHINE
Clouds are tiny droplets of water vapor, suspended and floating in the air. Their forms, shape, heights and movements indicate the sky and weather conditions of a particular place. On maps, places with an equal degree of cloudiness are joined…
Study Guide
