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Weathering With the aid of a labelled diagram(s), explain how frost action occurs. - Junior Cycle Geography - Question C - 2012
Question C
Weathering With the aid of a labelled diagram(s), explain how frost action occurs.
Worked Solution & Example Answer:Weathering With the aid of a labelled diagram(s), explain how frost action occurs. - Junior Cycle Geography - Question C - 2012
Step 1
Labelled Diagram
Answer
A labelled diagram illustrating frost action can include the following elements:
- Soil: Depict the upper layer of soil that becomes saturated with water.
- Pores in the soil: Indicate tiny spaces where water can occupy.
- Freezing water: Show water in the pores of the soil freezing and expanding.
- Ice expansion: Illustrate how ice expands, exerting pressure on the surrounding soil.
- Cracks in soil: Indicate resulting cracks due to ice expansion.
The diagram should clearly label these components for better understanding.
Step 2
Step 3
Explanation 2: Ice Expansion
Answer
As the temperature decreases further, the water in the pores freezes. When water freezes, it expands by approximately 9%, which creates pressure on the surrounding soil. This pressure can cause the soil structure to fracture, leading to further weathering.