Give a geographical reason for each of the following:

(i) Physical weathering is also called mechanical weathering.

(ii) Physical weathering is more rapid in desert climates.

(iii) Chemical weathering occurs in moist and cold climates.

Draw a well labelled diagram to show the process of physical weathering.

What is biological weathering? State the main agents of biological weathering.

Give a geographical reason for each of the following:

(i) Biological weathering is also known as organic weathering.

(ii) Vegetation prevents disintegration of rocks.

(iii) Chemical and biological weathering is negligible in polar climates.