Question

1. Describe the various processes involved in physical weathering.
2. What is the importance of weathering?​

Answer 1

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1.Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. There are two main types of physical weathering: Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.

2.Weathering also contributes to the formation of soil by providing mineral particles like sand, silt, and clay. Elements and compounds extracted from the rocks and minerals by weathering processes supply nutrients for plant uptake.

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Answer 2

Answer:

1 Physical weathering is also referred to as mechanical weathering. It is the weakening of rocks followed by disintegration due to the physical or mechanical forces including the actions on the rocks by abrasion, frost chattering, temperature fluctuations and salt crystal growth.

External environmental forces such as wind, water waves, and rain also consistently exert pressure on the rock structures resulting in accelerated disintegration. Physical weathering does not involve any chemical changes because the chemical composition of the rocks is never altered. Below is how the process occurs and the types of mechanical/physical weathering

Explanation:

2 Weathering is important because it: Produces unconsolidated material (parent material) from which soil is formed.