Bits of rock and sand in waves grind down cliff surfaces like sandpaper.
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Hydraulic action
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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Attrition
Waves smash rocks and pebbles on the shore into each other, and they break and become smoother.
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Solution
. Acids contained in sea water will dissolve some types of rock such as chalk or limestone.
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Weathering
the breakdown of rock and soil without moving
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Erosion
the breakdown or rock and soil with movment
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Other cards in this set
Card 2
Front
Hydraulic action
Back
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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