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2797898
weathering 1
Descrição
here is some info on weathering on rocks
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weathering
rocks
soil
Mapa Mental por
DJ AD
, atualizado more than 1 year ago
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Criado por
DJ AD
mais de 9 anos atrás
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weathering 1
weathering and soil
weathering
weathering is the break down of rocks by the action of the weather, plants and animals.
chemical weathering takes place when weak acid rain water dissolves rocks:
limestone is made from a mineral called calcium carbonate.
this reacts with carbonic acid in rain water to form soluble minerals
these are washed away and the limestone is weathered
Freeze that weathering happens in cold, usually mountainous locations:
water gets into cracks in rocks
the water freezes an expands
this puts pressure on the rock causing it to split and break up.
onion skin weathering occurs in places where there is a significant difference between day and night temperatures, such as in deserts
during the day the sun heats the rocks causing them to expand
during the night the rocks call down and contract.
the surface the rocks heat up and cools down faster than the core of the rocks which creates stress and tension in the rock
eventually the surface layers of the rock crack and begin to peel away like the outer layers of an onion
biological weathering occurs when rocks are broken down by plants and animals.
plants roots are able to force their way through weaknesses in rocks
as the plants grow the roots widen and the rocks are cracked and split apart
burrowing animals may also break up rocks as they dig through the ground
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