Sub-aerial Processes

What are sub-aerial processes?

They are natural processes on the earth’s surface which act on the part of cliffs above the high water mark

What is weathering?

The breakdown of rock at or near the ground

What are the 3 types of weathering?

Mechanical, chemical and biological

What is an example of mechanical weathering?

Freeze-thaw

How does freeze-thaw work?

Water enters cracks and freezes it expands by 10% weakening the rock

What happens when freeze-thaw occurs with salt water?

Salt crystals form

What is an example of chemical weathering?

Acid rain

How does biological weathering?

Plant or animals breakdown rock

What is mass movement?

Downslope movement of rock/soil

What are the 3 types of mass movement?

* Rockfall
* Slumping
* Sliding

What is rockfall?

The sudden falling of unsupported rock

What is slumping?

When saturated soil/rock slumps and slips along a curved surface

What is sliding?

Large amount of rock/solid move downslope rapidly

What will climate effect?

The type of weathering and rate of erosion

What do heavy rains cause?

A higher chance of slumping

What are prevailing winds?

Strongest direction wind normally blows from

How’s odes seasonal weather effect the coast?

Low pressure over the Atlantic causes destructive waves