Weathering of rocks and erosion — task. Science CBSE, Class 7 New.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. Which of the following is the best method to reduce soil erosion?

Removing all grass
Digging deeper trenches everywhere
Cutting down forests
Planting more trees

2. Why are weathering and erosion called slow natural changes?

They take a very long time to produce noticeable changes in nature.
They happen only during earthquakes.
They happen only during the night.
They occur only in deserts.

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