Waterfall Formation

Front

Waterfalls form when a river goes over layers of hard and ____ rock.

Back

soft

Front

When soft rock is eroded, undercutting happens. This forms an ________

Back

overhang

Front

When the soft rock is eroded at the base of the waterfall, what feature is formed?

Back

Plunge pool

Front

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

Back

retreat

Front

Waterfalls are created when a river flows over alternate layers of hard and ________ rock.

Back

soft

Front

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

Back

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

Front

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

Back

overhang

Front

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

Back

erosion

Front

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

Back

erosion