Hydrosphere Processes of Erosion

Question 1

Hydraulic Action

Answer 1

This is when the water pushes air into cracks in the rocks on the banks and bed of the river, causing the crack to expand and the rock breaks

Question 2

Abrasion

Answer 2

Rocks carried in the river and hurled against the banks and bed of the river, chipping rocks away, eroding it

Question 3

Solution

Answer 3

Water is slightly acidic and can react with certain types of rock eg. Limestone, a chemical reaction occurs and the rock is dissolved