Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
40 Cards in this Set
- Front
- Back
|
Plasticlike
|
Not completely solid or liquid, capable of being molded or changed
|
|
|
Sediment
|
Loose materials, such as mineral grains and rock fragments, that have been moved by erosional forces
|
|
|
Wind, Water, Glaciers, and Gravity
|
Agents of erosion
|
|
|
Glacier
|
Large mass of ice and snow that moves under its own weight
|
|
|
Plucking
|
Process of water freezing around objects - the objects are then "lifted and carried" elsewhere
|
|
|
Till
|
Mixture of different sized sediments
|
|
|
Moraine
|
Till that is deposited on the sides and to the front of glaciers
|
|
|
Outwash
|
Sediments that are deposited by glacier melt water
|
|
|
Eskers
|
Sediment deposited in ice tunnels or by streams on top of the ice - left behind when a glacier melts
|
|
|
Cirque
|
Bowl-shaped depression eroded by valley glaciers
|
|
|
Horn
|
Sharp peaks formed by three or more valley glaciers eroding a mountain from several directions
|
|
|
Arete
|
Sharp ridge formed by two, side by side, valley glaciers eroding down a mountain
|
|
|
U-shaped
|
Glacially eroded valleys
|
|
|
Hanging Valley
|
A tributary glacial valley whose mouth is high above the floor of the main valley
|
|
|
Drumlins
|
Mounds of till left behind by glaciers
|
|
|
Continental Glaciers
|
Glaciers that are found in the polar regions and cover 10% of the Earth
|
|
|
Valley Glaciers
|
Glaciers that are found in mountainous regions with low temperatures year round
|
|
|
Retreating
|
The appearance that a glacier is moving backwards - but is actually the result of melting
|
|
|
Grooves
|
Deep, long, parallel scars left on rocks - caused by scouring of plucked rocks carried by glaciers
|
|
|
Striations
|
Shallow marks left on rocks - a result of the scouring of plucked rocks carried by glaciers
|
|
|
Sandstorm
|
Grains of sand bounce along and hit other grains, causing more and more to rise into the air and form a low cloud
|
|
|
Dust Storm
|
A fast wind is needed to lift silt and clay sized particles, lifting them high into the air - can be carried long distances
|
|
|
Windbreak
|
Rows of vegetation that decrease the wind speed
|
|
|
Roots
|
Slender fibers that twist and turn between particles, holding them in place
|
|
|
Loess (LES)
|
Sediments from glacier outwash areas that have been transported by the wind - finest sediment
|
|
|
Dune
|
Mound of sediments that has been deposited by the wind - side facing the wind is has a gentle slope
|
|
|
Barchan
|
Crescent shaped dune that forms on hard surfaces where sand supply is limited
|
|
|
Transverse
|
Dunes that are perpendicular to the wind direction - form where sand is abundant
|
|
|
Erosion and Deposition
|
Part of a cycle of change that constantly shapes and reshapes the land
|
|
|
Friction
|
Force that opposes the motion of an object when the object is in contact with another object or surface
|
|
|
Mass Movement
|
Any type of erosion that happens as gravity moves materials downslope
|
|
|
Deposition
|
Eroded sediments that are relocated
|
|
|
Erosion
|
Process that wears away surface materials and moves them from one place to another
|
|
|
Slump
|
Material that moves down along a curved surface - happens quickly
|
|
|
Creep
|
Occurs when sediments slowly shift downward - common in areas of frequent freezing and thawing
|
|
|
Mudflow
|
Occurs in areas that have thick layers of loose sediments- heavy rainfall and lack of vegetation can trigger this event
|
|
|
Rockfall
|
The most dangerous of all mass movements - rocks tumble through the air
|
|
|
Mass Movements need the help of these things to get them going
|
A slope, H2O, sediments, and gravity
|
|
|
Deflation
|
Wind erosion that sweeps away smaller particles such as sand, silt, and clay
|
|
|
Abrasion
|
Windblown sediment that strikes rocks- acts like a sandblaster
|
