Question

Which of the below correctly describes the ice in a mountain glacier?

20) ______
A) never stops moving downhill
B) moves downhill when snow accumulation exceeds ablation
C) never stops moving uphill
D) moves downhill only during times of high temperature
E) On the average, it moves downhill once every hundred years.

Answer 1

Mountain glaciers move downhill when snow accumulation is greater than ablation, shaping the landscape over time and detected by crevasses. The correct answer is option B).

Step-by-step explanation:

The correct description of the ice in a mountain glacier is that it moves downhill when snow accumulation exceeds ablation. Glaciers are dynamic entities that change in response to temperature and precipitation. They move continuously, albeit often slowly, unless they become too small or are on a flat terrain where they may become stagnant. In Glacier National Park, for example, glaciers carve the landscape changing over thousands of years and can be detected by crevasses or cracks that form in the ice as the glacier moves.