Glacier
Definition 1 of 2
Pro Tip 1/3
Not Just Ice
Glaciers are made of compacted snow, not just frozen water like ice cubes. The giant glacier comprised layers of ancient snowfall.
Pro Tip 2/3
Slow Movement
Though glaciers move slowly, they can reshape the earth's surface over time. The valley was carved by the slow-moving glacier.
Pro Tip 3/3
Climate Indicator
Glaciers are sensitive to climate changes, often used as indicators of global warming. Scientists study glacier melting to understand climate change.