River Erosion Quiz

A quiz about different types of river erosion. Can be used for GCSE or AS Geography.

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  • Created by: Sophie
  • Created on: 29-10-09 14:11

1. Which statement best describes hydraulic action?

  • Minerals are dissolved in the water.
  • The force of air and water on the sides of the river and in cracks.
  • Rocks become smaller and rounder as they travel down the river.
  • Rocks are dissolved by high acid levels in the river.
  • Resistant rocks are underlain by less resistant beds, so the rock breaks away.
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2. Hydraulic action can lead to undercutting. True or false?

  • True
  • False

3. Why do you find smaller rocks in the river's lower course, and larger rocks in the upper course?

  • Larger rocks get stuck in depressions, creating pot holes, so only the smaller rocks travel down.
  • Due to attrition: the rocks collide with each other breaking apart, becoming smaller and rounded. Water rounds them as they travel down.
  • Due to corrosion: most rocks are dissolved by the time they reach the lower course.

4. Which type of rock is most likey to suffer from corrosion?

  • Slate
  • Volcanic rock
  • Limestone
  • Brick

5. During corrosion, what is removed from the rock?

  • Chemical ions
  • It's outer layer
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