Exercises on lesson 4 4.1 grade 4

It is the process by which natural forces move weathered rocks and soil from one place to another.

It is the process in which weathered rocks and soil are layed down or dropped by wind, water or gravity.

A fan-shaped (triangular) mass of sediment that is formed where a river enters a larger body of water like seas.

A hill of sand created by the wind.

They are small solid materials such as sand, soil and small rocks that carried by water to another place.

The force that pulls down broken weathered rocks at mountainsides.

Gentle winds can form large sand dunes like that in Egyptian western desert.

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Deposition process never change the shape of the land.

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Sea waves may cause erosion of beaches.

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The effect of erosion may last for hundreds of years.

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