Question

Arrange the process of weathering in the order it occurs.

i) Rocks exposed to temperature changes undergo expansion and contraction.

ii) Ice or roots of plants widens the cracks.

ii) Rainwater enters the cracks and becomes ice when the temperature drops.

iv) Over a period of time the rocks break and disintegrate into many pieces.

• A. i,ii, iii, iv
• B. i, iii, ii, iv
• C. ii, i, iii, iv
• D. iii, ii, i, iv

Answer 1

The correct option is B i, iii, ii, iv

Soil formation starts with the weathering of rocks. Rocks exposed to temperature changes, undergo expansion and contraction and start cracking over time. Rainwater enters these cracks and becomes ice when the temperature drops. The ice widens the cracks further. Sometimes the roots of plants also cause cracks in the rocks. Slowly, over a period of time, the rocks break and disintegrate into many pieces. This process is called Weathering.