Glacier+Homework

Glacier+Homework - Glacial outwash is glacial deposits that...

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Name:____________________________ Glaciers 1. Is a glacier advancing, retreating, or stationary if the snow accumulation is greater than the ablation (melting)? (1 pt) Glacier is advancing 2. How are glacial valleys shaped? (1 pt) a. v-shaped b. u-shaped c. w-shaped d. all of the above e. none of the above 3. Define and describe the differences between continental and mountain glaciers. (1 pt) Mountain glaciers form in areas of high topography. Some examples are cirque glaciers, valley glaciers, and piedmont glaciers. Continental glaciers form in high latitude areas. Examples are glacial till, glacial outwash, and glacial erratic. 4. What is a glacial erratic? (1 pt) A Glacial Erratic is large boulders within till, composed of rock that is not the same as the bedrock 5. What is glacial till and glacial outwash? where are they deposited? (2 pt) Glacial till is material deposited directly from melting ice.
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Unformatted text preview: Glacial outwash is glacial deposits that have been reworked by melt water streams 6. Describe how snow becomes glacial ice. (1 pt) Snow is 90% air which means there is less water. A snow becomes granular ice, firn, and then glacial ice, there becomes less air and more water which is the transformation of snow to glacial ice. 7. What are two glacial features that allow geologists to determine the direction of glacial movement? (1 pt) Accumulation and abalation 8. How is glacier related to global warming? (2 pt) Glaciers are sensitive to temperature change. Ice cores from glaciers are continuous records providing scientists with information regarding past climates. Trapped air bubbles reveal atmospheric composition and temperature variations....
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