Weathering is the breakdown of rocks where they are.
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Erosion
Erosion is when the rocks are broken down and carried away by something. eg; by sea water.
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Mechanical weathering
The breakdown of rock without changing its chemical composition. There's on main type of mechanical weathering that affects coasts - freeze-thaw weathering.
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Freeze-thaw.
1) It happens when the temperature alternates above and below 0 degrees.
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Freeze-thaw.
2) Water gets into the rock that has cracks. eg; granite
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Freeze-thaw.
3) When the water freezes it expands, which puts pressure on the rock.
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Freeze-thaw.
4) When the water thaws it contracts, which releases the pressure on the rock.
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Freeze-thaw.
Repeated freezing and thawing widens the cracks and causes the rock to break up.
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Other cards in this set
Card 2
Front
Erosion is when the rocks are broken down and carried away by something. eg; by sea water.
Back
Erosion
Card 3
Front
The breakdown of rock without changing its chemical composition. There's on main type of mechanical weathering that affects coasts - freeze-thaw weathering.
Back
Card 4
Front
1) It happens when the temperature alternates above and below 0 degrees.
Back
Card 5
Front
2) Water gets into the rock that has cracks. eg; granite
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