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Coasts in General? (KE) - Coggle Diagram
Coasts in General? (KE)
dynamic equilibrium
if left alone then all systems lead to equilibrium. However, since inputs are always changing systems are always in a state of flux, trying to reach equilibrium
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equilibrium is reached through feedback loops, which can be positive or negative
waves
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fetch = the distance over water the wind travels, powering the waves
basically the wind influences the height of the wave and the amount of energy that it has. The fetch influences the strength of the wind. The longer the fetch, the more powerful the wave
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circular orbital motion
in the open ocean, water particles don't move very far but the circular motion of each particle moves the energy from one coast to the other
breaking waves
friction with the sea bed slows the bottom of the wave. When the water depth is less than 1.3 x the wave height, the wave will break
constructive waves
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a gentle, sloping beach is formed
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destructive waves
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water is unable to percolate (soak) into the beach, as it doesn't have enough time
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weathering
defined as the break up and decomposition of rocks in their place of origin. It doesn't include the movement of material
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chemical weathering
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carbonation
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the more carbon dioxide in the atmosphere, the faster the rock is dissolved
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hydrolysis
water disassociates into H+ and OH- ions, which can react with minerals and break them down
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biological
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it is debated whether these are actually chemical and physical weathering rather than biological weathering, as they are very similar
