Waterfalls quiz

Which method of erosion involves the force of water breaking down rock?

• Corrosion

• Corrasion

• Hydraulic action

• Differential erosion

What happens when the river undercuts the harder rock?

• An overhang becomes unsupported and collapses

• It creates a waterfall

• The river changes its course

• It forms a plunge pool

How is the plunge pool below a waterfall deepened?

• By the formation of an overhang

• By rocks swirling around during high discharge

• Through corrosion

• By the river changing its course

What is the result of the waterfall moving upstream over time?

• The plunge pool disappears

• A steep-sided gorge is cut back into the hillside

• The river dries up

• The river becomes wider

Which rock erodes fastest?

• HARD

• SOFT

• PINK

• BLUE