Part 1-: Which of the following principles is/are important to both rock materia

Question

Part 1-:

Which of the following principles is/are important to both rock material deep within the Earth and glacier ice?

a) changing pressure on the material affects its melting point.

b) the solid material flows slowly under high pressure.

c) basal crystallization provides lubrication.

d) sostatic pressure causes the Earth’s crust to lift up at the middle of an active glacier.

e) A and B are both correct

f) B and C are both correct

Part 2-:

Which of the following takes place in alpine areas above the tree line?

a) snow accumulates in the zone of ablation as more is deposited in the winter than the amount that melts in the following summer.

b) the weight of a glacier under the force of gravity transports ice and sediments to lower altitudes.

c) firn loses porosity as it becomes granular snow.

d) all of the above.

e) both a and b are correct.

Part 3-:

A glacier terminus __________ if the rate of accumulation _________ the rate of wastage. This is a ___________ budget.

a) remains stationary; is less than; positive

b) flows; exceeds; balanced

c) advances; exceeds; positive

d) retreats; is less than; balanced

e) remains stationary; equal to; negative

Explanation / Answer

1. a and b. Due to change in pressure, melting points are effected thus layer under pressure become plastic

2. B d. all of the above

3.C. If glaciers advances, accumulation rate must be higher, due to accumulation a positive impact is created in movement. Thus it is a positive system.

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