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BSS ESC11 8-12 VOCAB
chapter 11
27
Science
11th Grade
12/18/2008

Additional Science Flashcards

 


 

Cards

Term

Arete

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Definition

a sharp rugged mountain ridge, produced by glaciation.

 

Term

Calving

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Definition
to break up or splinter so as to produce a detached piece.
Term

Cirque

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Definition
a bowl-shaped, steep-walled mountain basin carved by glaciation, often containing a small, round lake.
Term

Continental Glacier

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Definition
a glacier that spreads out from a central mass of ice.
Term

 Crevasses

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Definition
A deep fissure, as in a glacier; a chasm.
Term

Drumlins

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Definition
An elongated hill or ridge of glacial drift.
Term

Erratics

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Definition
a piece of rock that deviates from the size and type of rock native to the area
Term

Eskers

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Definition
A long, narrow ridge of coarse gravel deposited by a stream flowing in or under a decaying glacial ice sheet
Term

Firn

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Definition
partially consolidated snow that has passed through one summer melt season but is not yet glacial ice.
Term

Glacial Trough

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Definition
Steep-sided, flat-bottomed valley formed by a glacier. The erosive action of the glacier and of the debris carried by it results in the formation not only of the trough itself but also of a number of associated features, such as hanging valleys
Term

Glacier

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Definition
an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of accumulation, as in continental glaciers.
Term

Horn

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Definition
A pyramidal mountain peak, esp. one having concave faces carved by glaciation.
Term

Ice Caps

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Definition
An extensive dome-shaped or platelike perennial cover of ice and snow that spreads out from a center and covers a large area, especially of land.
Term

Ice Front

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Definition
the forward section or seaward edge of an ice shelf.
Term

Ice Sheet

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Definition
a broad, thick sheet of ice covering an extensive area for a long period of time.
Term

Kames

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Definition
A short ridge or mound of sand and gravel deposited during the melting of glacial ice
Term

Kettle

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Definition
A depression left in a mass of glacial drift, formed by the melting of an isolated block of glacial ice.
Term

Moraine

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Definition
a ridge, mound, or irregular mass of unstratified glacial drift, chiefly boulders, gravel, sand, and clay.
Term

Nunataks

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Definition
a hill or mountain that has been completely encircled by a glacier.
Term

Outwash

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Definition
the material, chiefly sand or gravel, deposited by meltwater streams in front of a glacier.
Term

Outwash Plains

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Definition
a flat or gently sloping surface composed of glacio-fluvial deposits.
Term

Roches Moutonnees

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Definition
An elongate mound of bedrock worn smooth and rounded by glacial abrasion.
Term

Rock Flour

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Definition
Finely ground rock particles produced by glacial abrasion. Also called glacier meal.
Term

Snow Line

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Definition
the line, as on mountains, above which there is perpetual snow.
Term

Striations

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Definition
any of a number of scratches or parallel grooves on the surface of a rock, resulting from the action of moving ice, as of a glacier.
Term

Till

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Definition
glacial drift consisting of an unassorted mixture of clay, sand, gravel, and boulders.
Term

Valley Glacier

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Definition
is a large, slow-moving river of ice, formed from compacted layers of snow, that slowly deforms and flows in response to gravity and high pressure.
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