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Chemistry CBSE Live product
Class 7
Changes around us: Physical and chemical changes
Reversible and irreversible changes
8.
Natural changes: Weathering of rocks and soil erosion
Question:
2
m.
Give short answer for the following questions:
Explain the process of weathering of rocks and soil erosion.
i.
How does plants contribute to the weathering of rocks?
Roots grow inside the crack, widens and hardens the rocks
Roots grow inside the crack, widens and strengthens the rocks
Roots grow inside the crack, and makes the rock stronger
Roots grow inside the crack, widens and breaks the rocks
ii.
Why does the area with lot of tress lose less soil during flood?
Roots of the trees hold the soil together, increasing soil erosion
Roots of the trees hold the soil together, reducing soil erosion
Roots of the trees removes the moisture in the soil, increasing soil erosion
Roots of the trees makes the soil dry, reducing soil erosion
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