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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Solution |
The dissolving of soluble chemicals in rocks eg limestone |
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Hydraulic power |
This is the power of the waves as they crash into a cliff. Trapped air is forced into the cracks and holes within the rock eventually causing the rock to break apart. The explosive force of the trapped air operating in a crack is called cavitation |
Trapped air |
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Attrition |
Rock fragments carried by the sea knock against each other causing them to become smaller, rounder, and smother. |
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Corrasion |
Fragments of rock are picked up and hurled by the sea at a cliff. The rocks act like tools scraping and gouging to erode the rock |
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Abrasion |
This is the sandpapring effect of pebbles grinding over a rocky platform often causing it to become smooth |
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Disposition at beaches |
Beaches are deposits of sand and shingle (pebbles) at the coast. sandy beaches are mainly found in sheltered bays. the waves entering the bays are constructive waves which means they have a strong swash and build up the beach. not all beaches are made of sand much of the south coast of England are pebble beaches. these high energy environments wash away the finer sand and leave behind the larger pebbles. these come from nearby eroded Cliffs or are deposited on shore from vast accumulations out to sea. Studland Bay, Dorset. |
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What are the three types of weathering ? |
Mechanical chemical and biological weathering. |
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What are the three types of weathering ? |
Mechanical chemical and biological weathering. |
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Describe the process of freeze Thaw |
1) water is collected in cracks in the Rock 2) at night the water freezes and expands causing the cracks in The Rock to become larger 3) when the temperature increases the Ice doors and water seeps deeper into the rock 4) after repeated freezing and thawing Fragments of rock made break off leaving scree on the foot of the cliff. |
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Salt weathering |
1)Sea water contains salt. when the water evaporates it leaves behind salt crystals. 2)in cracks and holes these salt crystals grow and expand. 3) this puts pressure on the rocks and flakes may eventually break off |
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What is mass movement |
Mass movement is the downward movement or sliding of material under the influence of gravity. |
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Carbonation |
Rainwater absorbs CO2 from the air and becomes slightly acidic. Contact with the alkaline rocks such as chalk and limestone produces a chemical reaction causing the rocks so slowly dissolve. |
Alkaline |
