River Landforms of Erosion GCSE CGP (P51) Waterfalls

What are the two types of erosion that erode the softer rock under the harder rock, creating a 'step' in the river.

• Hydraulic action

  Abrasion

• Attrition

  Abrasion

• Hydraulic action

  Attrition

What is the term used for the deep pool at the bottom of a waterfall carved out by the force of falling water

• an eddy

• a plunge pool

• a whirlpool

Rock that isn't easily eroded is called a ...... rock.

For a waterfall to form there needs to be two layers of rock. Which way round must they be?

• soft rock on top of hard rock

• hard rock on top of soft rock

Answer explanation

In which section of the river do waterfalls form?

• Upper course

• Middle course

• Lower course

• Every course

What is the name of the tallest waterfall in England located on the River Tees?

• High Power

• High Water

• High Force

• High Fall

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

• Abrasion

  Attrition

• Abrasion

  Solution

• Abrasion

  Hydraulic action

Over time the top rock sticks out over the bottom rock. It is unsupported and so eventually _____ into the plunge pool

Waterfalls are landforms created by....

• Erosion

• Deposition

The waterfall retreats (moves back) upstream towards the rivers source over thousands of years leaving behind a steep sided _________