| Question |
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| Answer |
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| 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 |
Science Vocab 147928
