Types Of Erosion

Question 1

Attrition

Answer 1

Rocks reduce in size due to colliding with each other and the bed and banks

Question 2

Hydraulic action

Answer 2

Sheer force of water pushes air into cracks which eventually breaks the banks of rivers into smaller debris

Question 3

Abrasion

Answer 3

Rubbing or scouring of the bed and banks by material carried by river

Question 4

Solution

Answer 4

Weak carbonic acids acts on smaller particles eroding them even smaller