Erosional processes and landforms

What is erosion?

• The movement of material from one place to another.

• The wearing away of material.

​ (a)   is when the action of water erodes the banks of a river.

• Hydraulic action
• Abrasion
• Attrition

Match these.

• Water forces into cracks.

• solution

• Rock is dissolved by acidic water.

• attrition

• Rocks and pebbles collide in the flow.

• hydraulic action

• Rocks grind along a rock platform.

• abrasion

The movement of load by a river is known as:

• transportation

• deposition

Match the following

• small particles are carried by the river

• traction

• large boulders roll along the river bed.

• suspension

• dissolved minerals carried by the river.

• saltation

• pebbles bounce along the river bed.

• solution

Match the transportation process to the type of load it moves.

• large rocks and boulders.

• suspension

• pebbles.

• solution

• mud particles.

• traction

• dissolved minerals.

• saltation

Where do v-shaped valleys form?

• upper course of a river.

• middle course of a river.

• lower course of a river.

Reorder the following

• The channel deepens.

• Sides become unstable.

• The river erodes downwards.

• The sides collapse.

• A v-shaped valley forms.

Over time, waterfalls move​ (a)   .

• backwards
• forwards.
• sideways

Reorder the following

• A band of hard rock sits atop soft rock.

• A plunge pool forms, with hard rock overhanging.

• The hard rock collapses and the waterfall retreats.

• Soft rock is eroded faster.

• A steep slope forms as the hard rock doesn't erode.