Specifications of natural resources-land ,soil and water
Answers
Answer:
Explanation:
Land is among the most important natural resources. Land covers about 30% of the total area of the earth’s surface.
Ninety percent of the world population occupies only 30% of the land area. The remaining 70% of land is either sparsely populated or uninhabited.
Land is unevenly inhabited due to various factors of land and climate, water fertility of soil, etc.
Soil is the thin layer of grainy substance covering the surface of the earth.
Soil is made up of organic matter, minerals and weathered rocks found on earth. It takes hundred of years to form few centimeters of soil.
Soil profile refers to the layered structure which spreads from the parent rocks to the top soil surface.
The four layers of soil profile are: 1st layer-Top soil with humus and vegetation, 2nd layer-Sub soil with sand, silt and clay, 3rd layer-weathered rock material, 4th layer-Parent rock.
In different geographic regions, different soils can be observed.
Water is a vital renewable natural resources. Three-fourths of the earth’s surface is covered with water. Therefore, it is called ‘water planet.
Ocean water is saline and not fit for human consumption whereas fresh water accounts for only 2.7% of the total water available.
Only 1% of this freshwater is available and fit for human use and is found as ground water, rivers, lakes, etc.
Fresh water is the most precious substance on earth. It can neither be added nor subtracted from the earth.
Water is used for agriculture, industries, generating electricity through reservoirs of dams, etc.
Explanation:
Land is among the most important natural resources. Land covers about 30% of the total area of the earth’s surface.
Ninety percent of the world population occupies only 30% of the land area. The remaining 70% of land is either sparsely populated or uninhabited.
Land is unevenly inhabited due to various factors of land and climate, water fertility of soil, etc.
Soil is the thin layer of grainy substance covering the surface of the earth.
Soil is made up of organic matter, minerals and weathered rocks found on earth. It takes hundred of years to form few centimeters of soil.
Soil profile refers to the layered structure which spreads from the parent rocks to the top soil surface.
The four layers of soil profile are: 1st layer-Top soil with humus and vegetation, 2nd layer-Sub soil with sand, silt and clay, 3rd layer-weathered rock material, 4th layer-Parent rock.
In different geographic regions, different soils can be observed.
Water is a vital renewable natural resources. Three-fourths of the earth’s surface is covered with water. Therefore, it is called ‘water planet.
Ocean water is saline and not fit for human consumption whereas fresh water accounts for only 2.7% of the total water available.
Only 1% of this freshwater is available and fit for human use and is found as ground water, rivers, lakes, etc.
Fresh water is the most precious substance on earth. It can neither be added nor subtracted from the earth.
Water is used for agriculture, industries, generating electricity through reservoirs of dams, etc.