USA HISTORY

Detailed explanation-1: -Glaciers are massive bodies of slowly moving ice. Glaciers form on land, and they are made up of fallen snow that gets compressed into ice over many centuries.

Detailed explanation-2: -The slow-moving mass of ice or ‘a river of ice’ is called a glacier. Glaciers are broadly classified into two categories based on the place of occurrence-continental glaciers and valley glaciers.

Detailed explanation-3: -The bottom of the ice sheet melts, causing the ice above it to move at a faster rate than the rest of the ice sheet. These fast-moving glaciers are called ice streams.

Detailed explanation-4: -The central and upper portions of a glacier, as do those portions of a stream, flow more quickly than those near the bottom and sides, where friction between the ice and valley walls slows down the flow.

Detailed explanation-5: -The moving ice mass downslope under the impact of gravity is called a glacier.