Question 25 Basal slip is made easier by. Group of answer choices: a glacier's polar location causing cold-base conditions bare sediment-free bedrock...
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Question 25Group of answer choices:a glacier's polar location causing cold-base conditions

Basal slip is made easier by...

bare sediment-free bedrock beneath the glacier


a layer of snow beneath the glacier


a layer of meltwater beneath the glacier


all of the above

 

Question 26

Choose the correct effects of pressure on the melting curves (solidus) of both rocks and ice:

Group of answer choices:


increasing Pressure melts rocks but freezes ice


increasing Pressure solidifies rocks but melts ice


increasing Pressure melts rocks and melts ice


increasing Pressure solidifies rocks and freezes ice


increasing Pressure has no effect on the solidus of either rock or ice

 

Question 27

Snow on the ground is...

Group of answer choices:


a metamorphic rock


an igneous deposit


a sedimentary deposit


a sedimentary rock

 

Question 28

The Missoula Floods narrative included which of these?

Group of answer choices:


rising sea level fills valley with lake


gigantic lake forms behind an active fault block mountain


advancing ice sheet forces water out of river valley


advancing ice sheet blocks a river


a giant lake forms in Wyoming

 

Question 29

Large rocks found in the Willamette Valley, originating hundreds of miles to the northeast, and having no relationship to the local bedrock where they are found, are...

Group of answer choices:


kettles


eccentrics


icebergs


erratics


erronics

 

Question 30

As snow falls from the sky and changes eventually into glacier ice, it passes through distinct phases. Put the following in the correct order:

           firn       glacial ice      granular ice      snowflakes      snowpack


Group of answer choices:


snowflakes, glacial ice, snowpack, granular ice, firn


snowflakes, granular ice, snowpack, glacial ice, firn


snowflakes, snowpack, firn, glacial ice, granular ice


snowflakes, snowpack, granular ice, firn, glacial ice


snowflakes, firn, snowpack, granular ice, glacial ice      

 

Question 31

A fiord is a drowned...

Group of answer choices:


cirque


graben


volcanic caldera


tarn


glacier-carved valley

 

Question 32

Glacial striations on bedrock are the result of...

Group of answer choices:


abrasion


ablation


braided rivers


the claws of vast hordes of rodents

 

Question 33

The geological cliché "The Present is the Key to the Past" means...

Group of answer choices:


geologically speaking, everything throughout earth history, both processes and rates, has always been pretty much like we see it today


processes that we see operating in the physical world today provide clues, insights, examples, and models to help interpret and explain the geological evidence of past events


what has happened in the geological past determines conditions and circumstances in the geological present


what you get for Christmas accurately reflects your behavior during the previous year


none of the above

 

Question 34

Continental ice sheets flow...

Group of answer choices:


like a low viscosity fluid


downward below the accumulation zone


from north to south


all of the above

 

Question 35

Evidence for the Missoula Floods included all of the following except...

Group of answer choices:


giant ripple deposits


U-shaped valleys carved into the Columbia River Gorge


sedimentary deposits covering and leveling valley bottoms in Oregon


blocks of rocks deposited far south and west from their bedrock origins


giant horseshoe shaped cliffs in eastern Washington suggesting huge former waterfalls, now dry or nearly so

 

Question 36

Changes in planetary insolation due to variations in Earth's orbital geometry or axial orientation include all of the following except... 

Group of answer choices:


magnetic polarity reversals


regular shifting of the tilt of the Earth's axis


wobble of the Earth's axis


systematic increase and decrease in orbital eccentricity

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