ES-10.2-How Glaciers Move

Multiple Choice

BELLRINGER:

How do glaciers contribute to shaping the Earth's landscapes?

• By forming mountains through volcanic activity

• By slowly moving and reshaping land through ice movement and erosion

• By causing earthquakes

• By increasing the temperature of the atmosphere

Multiple Choice

Which of the following best describes basal sliding in glacier movement?

• Movement within the ice due to molecular layers sliding over one another.

• Entire ice mass slipping along the ground, with the lowest portions moving by sliding.

• Ice melting and refreezing at the glacier's surface.

• Wind-driven movement of ice across the landscape.

Multiple Choice

Which of the following best explains why crevasses form in the upper layer of a glacier?

• The upper layer is brittle and tension over irregular terrain creates deep cracks.

• The upper layer melts faster than the lower layer.

• The glacier moves faster at the edges than in the center.

• The glacier is heated by geothermal energy from below which generates fractures above

Open Ended

Compare the methods used in the 19th century and modern times to observe glacial movement. What are the advantages and limitations of each?

Multiple Select

Which of the following statements about the glacial budget are correct?

• The zone of accumulation is above the snowline and promotes glacier movement.

• The equilibrium line is where accumulation equals wastage.

• The zone of wastage is above the snowline and thickens the glacier.

• Snowline elevation is constant across all regions.

Fill in the Blanks

Large ice pieces that break off from a glacier front at water bodies are called

.

Multiple Choice

What are the two main types of ice movement in glaciers discussed in the lesson?

• Plastic flow and basal sliding

• Melting and freezing

• Erosion and deposition

• Condensation and sublimation