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27 Cards in this Set
- Front
- Back
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weathering |
were away |
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erosian |
the process of eroding or being eroded by wind, water, or other natural agents |
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sand dune |
a ridge of sand created by the wind |
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suspend |
A mixture in which small particles of a substance are dispersed throughout a gas or liquid. |
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windward |
facing the wind or on the side facing the wind. |
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slip face |
the side of a dune where the slope |
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abrasion |
the mechanical scraping of a rock surface by friction between rocks and moving particles during their transport by wind, glacier, waves, gravity, running water or erosion. |
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deflation |
erosion by wind of loose material from flat areas of dry, uncemented sediments such as those occurring in deserts, dry lake beds, floodplains, and glacial outwash plains |
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zone of saturation |
the area below ground in which all interconnected openings within the geologic medium are completely filled with water |
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zone of areation |
Region in the ground in which pore spaces are filled with air in the Water table |
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bedrock |
is the hard, solid rock beneath surface materials such as soil and gravel. |
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water table |
The level below which the ground is completely saturated with water |
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porosity |
Liquids go right through things that have porosity |
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pemeability |
A small-scale form of exfoliation, called spheroidal weathering, is restricted to boulder sized rock material and may occur at some depth within the Earth |
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frost action |
The weathering process caused by cycles of freezing and thawing of water in surface pores, cracks, and other openings |
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root action |
the various mechanical and chemical processes that cause exposed rock to decompose. |
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oxidation |
the process when oxygen combines with an element, changing the appearance of the element. When iron reacts with oxygen and changes to rust |
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hydrolysis |
Chemical weathering is what happens when rocks are broken down and chemically altered |
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acid rain |
a rain or any other form of precipitationthat is unusually acidic, meaning that it possesses elevated levels of hydrogen ions |
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chemical weathring |
what happens when rocks are broken down and chemically altered |
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physical weathering |
also called mechanical weathering, refers to the process of breaking rocks apart while retaining their chemical composition |
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mass movment |
the movement of surface material caused by gravity. Landslides and rockfalls are examples of very sudden movements of this type |
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creep |
geology, slow downslope movement of particles that occurs on every slope covered with loose, weathered material. |
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mudslide |
he rapid downward movement of a large quantity of saturated earth |
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avalanche |
A large mass of snow moving rapidly down a mountain slope |
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slump |
a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or rock layers moves a short distance down a slope |
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landslide |
a situation when dirt, rock or other pieces of earth begin to slide down a mountain or slope, or when someone wins a contest by a big majority. |
