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18 Cards in this Set
- Front
- Back
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What is weathering? |
the process that breaks down ticks and other substances at Earth's surface
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What is Erosion? |
The movement of rock particles by wind, water, ice, or gravity
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What is mechanical weathering?
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the type of weathering in which rock is physically broken into smaller peices |
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what is chemical weathering?
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the process that breaks down rock through chemical changes
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wfat is freezing and thawing? |
when water that has seeped into the cracks in a rock freezes and expands making the crack wider and deeper, then repeats
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what is plant growth?
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roots of trees and other plants enter cracks in rocks, then pry apart rock
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describe actions of animals
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burrowing of animals loosen and break apart rock in the soil, or create passageways for other animals to burrow
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what is abrasion
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sand and other rock particles that are carried by wind, water, or ice can wear away exposed rock
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what is release of pressure??
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erosion removes material from surface and pressure is released and causes rock to expand and flake off
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what does water do?
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dissolves, one of the most important
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how does oxygen work?
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this plus water plus iron causes rust, makes reddish brown color and soft and crumbly
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what is another word for rust?
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oxidation
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what does carbon dioxide do?
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water plus carbon dioxide is carbonic acid dissolves weathers limestone and marble
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what do living organisms do?
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plant roots produce a weak acid that slowly dissolves things, lichen grow on rock and produce weak acid
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what does acid rain do?
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burning fuels pollutes air and form acid in clouds and fall as acid rain
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type of rock affects chemical weathering how?
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minerals that dissolve easily in water weather fast
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how does climate affect weathering speed?
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weathering in hot and wet are fast; in cold and dry slow
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what is the most important cause of weathering?
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water
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