Waterfalls

Question 1

First part of the formation of a water fall

Answer 1

The river flows over areas of hard and soft rock eroding. Soft rock erodes faster than hard through abrasion and hydraulic action

Question 2

2nd part of the formation

Answer 2

The hard rock sticks out causing a steep to form

Question 3

3rd part of the formation

Answer 3

Over time the step will get bigger and the soft rock at the bottom of the water fall is eroded to form a plunge pool

Question 4

4th part of the formation

Answer 4

The soft rock will erode deeper and backwards, undercutting the hard rock and causing the step to collapse

Question 5

5th part of the formation

Answer 5

The process repeats and the hard rock step above the plunge of pool collapses and the waterfall moves back, creating a gorge