Soil class 7 | worksheet and printable

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soil class 7 | worksheet and printable | CBSE class 7

soil class 7. Download soil class 7 worksheet based on the latest CBSE syllabus including MCQ on soil, define, long questions, diagram-based question on soil for class 7 CBSE students.

Points to remember

The mixture of rock particles and humus is called the soil

 

The rotting dead matter in the soil is called humus. You probably know that the soil is formed by the breaking down of rocks by the action of wind, water and climate This process is called weathering. The nature of any soil depends upon the rocks from which it has been formed and the type of vegetation that grows in it and A vertical section through different layers of the soil is called the soil profile

 

Soil profile can also be seen while digging a well or laying the foundation of a building. It can also be seen at the sides of a road on a hill or at a steep river bank.

The uppermost horizon is generally dark in color as it is rich in humus and minerals. The humus makes the soil fertile and provides nutrients to growing plants This layer is generally soft, porous, and can retain more water. It is called the topsoil or the A-horizon

The next layer has a lesser amount of humus but more of minerals. This layer is generally harder and more compact and is called the B-horizon or

the middle layer.

The third layer is the C-horizon which is made up of small lumps of rocks with cracks and crevices

 

The soil is classified on the basis of the proportion of particles of various sizes. If soil contains a greater proportion of big particles it is called sandy soil If the proportion of fine particles is relatively higher, then it is called clayey soil The best topsoil for growing plants is loam. Loamy soil is a mixture of sand, clay, and another type of soil particle known as silt.

 

What are the uses of soil:

Soil is used in agriculture

Soil is also used in antibiotics

Clay soil is used in making ceramics, or pottery.

Beauty Products. Some beauty products are made with soil



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