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Chemistry CBSE Live product
Class 7 (2025-26)
Changes around us: Physical and chemical changes
Revision II - Physical and chemical changes
10.
Natural changes: Weathering of rocks and soil erosion
Question:
4
m.
Answer the following questions:
Write a short note on weathering of rocks and soil erosion.
i.
Weathering of rocks is a slow or fast change?
It is a slow change as it takes less time for the huge rocks to break down
It is a slow change as it takes several years for the huge rocks to break down
It is a fast change as it takes several years for the huge rocks to break down
It is a fast change as it takes short time for the huge rocks to break down
ii.
How are soil erosion and weathering of rocks related?
Soil erosion - holds the soil from deep down; weathering of rocks - formation of rocks
Soil erosion - formation of soil; weathering of rocks - carries away the top soil
Soil erosion - holds the top soil; weathering of rocks - formation of soil
Soil erosion - carries away the top soil; weathering of rocks - formation of soil
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