Waterfall Formation

Waterfalls form when a river goes over layers of more resistant and (a)   resistant rock

When less resistant rock is eroded undercutting happens. This forms an ________

• overhang

• overdrop

• overcut

When the less resistant rock is eroded at the base of the waterfall what feature is formed?

• Undercut

• Gorge

• Plunge pool

When the overhang collapses the waterfall moves upstream. What is this called?

• backup

• retreat

• surrender

Rivers carve their own path by eroding (a)   rock more than more resistant rock.

Which of the following happens to make a step on the river bed?

• The moving water erodes the hard and soft rock at the same speed/rate

• The moving water deposits sediment on the river bed, creating a step

• The moving water erodes the soft rock faster than the hard rock

• The moving water erodes the hard rock faster than the soft rock

What will be formed after a period of undercutting beneath the hard rock layer?

• wave-cut platform

• plunge pool

• overhang

• v-shaped valley

The process of wearing away and cutting into rock in a river is called ___________.

• transportation

• erosion

• deposition

"Water cuts into the rock and wears it away," This is called...

• sediment

• deposition

• erosion

Below are listed the 4 types of erosion. Which two are important in the formation of waterfalls?

• Hydraulic action

• Abrasion

• Attrition

• Solution