Question

"The earth crust is unstable". Explain two effect on the earth surface?(in 40 words.)

Answer 1

soil erosion is one of the example

Answer 2

The earth's crust is unstable because of the exogenic forces.The exogenic forces are modified by two processes - weathering and erosion. 
Weathering is the process of disintegration of rocks.
Erosion is the process by which weathered material are transported elsewhere.

or we said

The earth crust is unstable due tectonic plate which is under land when there collision occurs there are change ment among them two are valley, volcanic


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