Coasts - Erosion Processes

Question 1

Hydraulic Action (physical)

Answer 1

Pressure - Air trapped in cracks & holes in rock.
Crashing wave compresses air, driving it further into rock and splitting the rock.

Question 2

Abrasion (physical)

Answer 2

Sandpaper - Waves throw material against the rocks and cliffs causing it to gradually wear down.

Question 3

Attrition (physical)

Answer 3

Break to smaller pieces - Rocks carried by the water, roll back and forth against each other, slowly breaking into smaller pieces.

Question 4

Corrosion (chemical)

Answer 4

Dissolves - Acidic sea water dissolves/corrodes soluble material within the rock.
Water chemically breaks down the rock.