Air may become trapped in joints and cracks on a cliff face. When a wave breaks, the trapped air is compressed which weakens the cliff and causes erosion.
Hydraulic action
5 of 8
Bits of rock and sand in waves grind down cliff surfaces like sandpaper.
Abrasion
6 of 8
Waves smash rocks and pebbles on the shore into each other, and they break and become smoother.
Attrition
7 of 8
Acids contained in sea water will dissolve some types of rock such as chalk or limestone.
Solution
8 of 8
Other cards in this set
Card 2
Front
Then the water runs back down the beach
Back
Backwash
Card 3
Front
The swash is stronger than the backwash.
Back
Card 4
Front
The backwash is stronger than the swash
Back
Card 5
Front
Air may become trapped in joints and cracks on a cliff face. When a wave breaks, the trapped air is compressed which weakens the cliff and causes erosion.
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