This figure shows a glacial landscape. Drag the label of each glacial feature to its corresponding location on the figure.
- u-shade valley
- terminal moraine
- lateral moraine
- cirque
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top: u-shaped valley, cirque
right side: lateral moraine, terminal moraine
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What does a terminal moraine represent?
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a pile of sediment deposited at the end of the glacier
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This figure shows a glacial landscape. Drag the description of how each glacial feature formed to its corresponding location on the figure.
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top:
1. sediment deposited
2. sediment scoured
3. a pile of
bottom:
1. formed by blocks
2. glacially derived
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What is the main way that position of the continents can influence global sea level?
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Continents at high latitudes provide a setting in which large ice sheets can form.
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What features are shown in this photograph?
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pinnacles and sea stacks
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What are these sharp, glacially carved ridges?
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arete
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What happens to snowflakes as they become progressively buried within glaciers?
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They become interlocking crystals of ice.
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How does the rate of seafloor spreading affect sea level?
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Faster spreading produces broader ridges that displace water out of the oceans.
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Choose the Moon position that would cause a spring tide (higher than normal high tides and lower than normal low tides) in North America (North America is on the sunlit side of the globe).
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position 3
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Sand and other sediment
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can move laterally along the coast if waves approach the beach at an angle
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What carved this U-shaped valley?
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glacier
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What happens when a glacier encounters the sea or a lake?
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Large blocks of ice collapse off the front of the glacier and become icebergs.
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What is one reason why the East Coast has so many bays and islands?
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Water released from melting glaciers raised sea level.
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Which of the following is true about how shorelines are affected from the water side?
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Waves can erode, deposit, or simply transport sediment.
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What geologic event is probably indicated by this irregular coast, with estuaries?
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a rise in sea level
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What is the depth of wave base?
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the depth to which wave action extends
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Which of the following is NOT an approach communities have tried to address shoreline problems?
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lowering the local sea level
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What type of glacier is shown on the gently sloping land near the coastline?
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piedmont glacier
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Abrasion is distinguished from plucking in that abrasion is
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a smooth scraping, while plucking is a more jagged gouging of the bedrock.
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What is this bowl-shaped, glacially carved feature?
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cirque
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The present-day tilt of Earth's axis of rotation is 23.5º. What would be the result of less tilt, as shown here?
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high latitudes would receive less direct sunlight during the summer, causing cooler temperatures
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Which of the following would cause sea level to fall?
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a slowing in the rate of seafloor spreading
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What landforms would you expect to see in the diagram after the glaciers melted completely away?
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all of these
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What type of glacier is shown in the center of this image?
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valley glacier
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Choose the Moon position that would cause high tide in North America (North America is on the sunlit side of the globe).
answer
position 3
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Which of the following parts of a shoreline is more likely to experience intense erosion?
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the seaward end of a promontory
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This figure shows a glacial landscape. Drag the label of each glacial feature to its corresponding location on the figure.
- cirque
- tarn
- arete
- hanging valley
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top: cirque, tarn, arete
bottom: hanging valley
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Which of the following is true about how waves form and break upon the shore?
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waves begin to change when they reach water shallower than wave base
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What happens to the land surface when large ice sheets melt away?
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The land flexes upward due to isostatic rebound.
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What is a primary reason an increase in glaciers on land would cause sea level to fall?
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glaciers tie up large volumes of water that would otherwise be in the sea
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The orientation of a coastline affects the appearance of a shoreline primarily because it influences
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the erosive effects of waves.
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In what direction does a spit typically grow with time?
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in the same direction as a longshore current
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What is probably the least expensive approach for avoiding shoreline hazards?
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forbid the building of houses or other structures in high-risk areas
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If waves approach the shore at an angle they
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bend so they approach the shore more directly.
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Choose the Moon position that would cause a neap tide (lower than normal high tides and higher than normal low tides) in North America (North America is on the sunlit side of the globe).
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position 1
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What causes high and low tides?
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water is pulled by the gravity of the moon
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Choose the Moon position that would cause low tide in North America (North America is on the sunlit side of the globe).
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position 2
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The margins of glaciers are usually darker than the interior primarily because
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the sides have a higher concentration of rocks and other debris.
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What is permafrost?
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the upper part of the ground that remains frozen throughout the year
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