Glaciers & Ice Sheets

Question 1

Scientists observe a snowfield high on Mount Icepeak. Which statement correctly explains how that snowfield could become a glacier that slowly moves down the mountain?

Accepted Answer

Over many winters, snowfall builds up layer after layer; the weight of the newer snow squeezes the lower layers, turning them into compact ice, and the thick, heavy ice begins to slide downhill slowly because of its own weight.

Answer

A thick layer of snow melts during the day, refreezes at night into ice, and this ice immediately starts flowing downhill as soon as it forms.

Answer

A single huge snowfall compacts all the snow at once into solid ice, which then slides down the slope because ice is slippery.

Answer

Strong winds push accumulated snow down the mountain, and the moving snow itself becomes a glacier.

Question 2

Which of the following best explains how the snowfall on the high slopes of Mount Crystal turns into a glacier that slowly moves downhill?

Accepted Answer

Snow accumulates in layers, the weight squeezes the lower layers into solid ice, and the thick ice slowly flows downhill under its own weight.

Answer

Snow falls and then melts; the water refreezes into a thick layer that slides down the mountain.

Answer

Snow builds up, the sun melts the surface, and wind pushes the frozen snow sideways.

Answer

Snow piles up and over many years turns into solid rock, which then slides down the slope.

Question 3

Which of these explains the way a glacier develops on a mountain?

Accepted Answer

Snow falls each year, the layers are pressed together until the snow becomes dense ice, and the ice then slowly moves downhill under its own weight.

Answer

Snow falls, melts into water, and the water refreezes into a glacier that slides down the slope.

Answer

Snow falls and instantly turns into solid ice, which then immediately flows down the mountain.

Answer

Snow accumulates, wind packs it into a heap, and the heap stays in place as a glacier.

Try three questions

Scientists observe a snowfield high on Mount Icepeak. Which statement correctly explains how that snowfield could become a glacier that slowly moves down the mountain?

Which of the following best explains how the snowfall on the high slopes of Mount Crystal turns into a glacier that slowly moves downhill?

Which of these explains the way a glacier develops on a mountain?

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