the breakdown of rocks without changing the chemical composition
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what is chemical weathering?
the breakdown of rocks by changing the chemical composition
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example of chemical weathering?
carbonation weathering- rainwater containing CO2 makes it weak carbonic acid, reacts with rocks containing calcium carbonate
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example of mechanical weathering?
freeze thaw- temp alternates around 0*C, water gets in cracks and freezes and expands, then thaws and contracts and breaks up rock
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destructive waves
erode coasts, strong backwash, weak swash
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constructive waves
build coasts, strong swash, weak backwash
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how is a wave cut platform made?
cliff eroded by hydraulic action and corrasion, becomes unstable and collapses and material is eroded into beach material, new wave cut notch is formed
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