click below
click below
Normal Size Small Size show me how
Erosion & Weathering
7th grade 14 C TEKS
Question | Answer |
---|---|
all material arrived and deposited by glaciers | glacial drift |
happens when a group of loose rocks fall down a steep slope. | rock fall |
rapid movement of a large mass of mud | mudflow |
a glacial deposit that is sorted into layers based on the size of the rock material | stratified drift |
sudden rapid movement of a large amount of a material downslope | landslide |
mudflows of volcanic origin | lahars |
a ridge of till bulldozed ahead and deposited by a glacier | moraine |
the final step in the erosional process | deposition |
a type of mass movement in which soil moves slowly down a hill, sometimes causing posts and trees to lean | creep |
glacial erosion in which frozen water removes rock fragments and adds them to the bottom of the glacier | plucking |
a large, heavy mass of compacted snow and ice that moves slowly downhill because of the force of gravity | glacier |
a thick deposit of fine, wind-eroded sediments | loess |
a type of erosion in which loose materials are carried downslope by gravity | mass movement |
unsorted mixture of rock and soil deposited by a retreating or melting glacier | till |
the process that removes surface materials and transports them from one place to another | erosion |
mass movement in which one large mass of loose material or rock layers tilts and moves downhill | slump |
wind erosion that removes loose, fine-grained sediments such as clay or silt and leaves behind coarser material | deflation |
The breakdown of rock into smaller and smaller pieces | weathering |
the breakdown of rock into smaller pieces by physical means including: ice, wind, water, gravity, plants, animals | mechanical weathering |
the grinding and wearing down of rock surfaces by other rock or sand particles | abrasion |
the chemical breakdown of rock and minerals into new substances by something such as water, weak acids, and air | chemical weathering |
precipitation that contains acids because of air pollution | acid rain |
chemical reaction in which an element, such as iron, combines with oxygen to form an oxide | oxidation |
a loose mixture of small mineral fragments and organic material | soil |
the layer of rock beneath the soil | bedrock |
the organic part of the soil, decayed plant and animal | humus |
Top layer of soil, contains more humus than the other layers | topsoil |
an area of shoreline made up of material deposited by waves | beach |
place where land and a body of water meet | shoreline |
a water current that travels near and parallel to the shoreline causing the sand to move in a zig zag pattern along the beach | longshore current |
mound of wind-deposited sand that are common in deserts and along the shore of lakes and oceans | dune |
the skipping and bouncing movement of sand sized particles in the direction the wind is blowing | saltation |