Bits of rock and sand in waves grind down cliff surfaces like sandpaper.
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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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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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Corrosion
Water dissolves minerals from the rocks and washes them away.
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Freezethaw
Water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.
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Wetting/drying
Softer rocks (e.g. clay) expand when wet and contract when they dry out. Overtime this can weaken rocks and make them more easily eroded.
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Other cards in this set
Card 2
Front
Waves smash rocks and pebbles on the shore into each other, and they break and become smoother.
Back
Attrition
Card 3
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.
Back
Card 4
Front
Water dissolves minerals from the rocks and washes them away.
Back
Card 5
Front
Water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.
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