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प्रश्न
Explain the following terms.
Colloids
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उत्तर
Colloids: Colloids are extremely tiny particles which are so small that they can not be seen by optical microscope ‘ and remain suspended indefinitely in water. They have the property of being electrically charged and can attract and hold ions of calcium, magnesium and potassium, known as bases. These bases are required by plants for their growth. – Soil colloids are also useful in holding water in the soil. When present in large quantities, they make the soil sticky and tough so that it is difficult to cultivate.
संबंधित प्रश्न
Soil formation is an important benefit of weathering. How is it important for mankind?
In which regions of the world is ‘frost action’ the common form of weathering?
What are exogenic forces?
What is the chief characteristic of weathering in tropical climates?
What is known as mass wasting?
Give one example of rapid mass movement.
What is a badland topography?
Rewrite the following sentence, choosing the right word from the options given below:
_______is produced by the decayed organic material, including dead leaves, stems roots, living bacteria, fungi, worms, and other organisms.
Describe how changes of temperature lead to weathering.
OR
How do changing temperature lead to weathering?
Is weathering essential as a pre-requisite in the formation of soils? Why?
