ES Unit10 17.1 Glaciers

When an ice shelf has a large chunk of ice break apart and drift out into the ocean, the large chunk is called a(n)

• ice sheet

• iceberg

• firn

• continental glacier

When snow melts and refreezes, a grainy ice is formed called a(n)

• ice sheet

• iceberg

• firn

• continental glacier

The brittle surface of a glacier can form a large crack as much as 50 m deep called a(n)

• crevasse

• crevice

• firn

• snowline

Snow and ice remain at a certain elevation throughout the year called a(n)

• ice sheet

• snowfield

• firn

• snowline

Snow compacts and forms a large mass of moving, flowing ice called a(n)

• iceberg

• snowfield

• glacier

• ice sheet

A mass of permanent snow and ice that remains almost motionless at high elevations and polar regions is called a(n)

• firn

• ice shelf

• snowfield

• alpine glacier

When a piece of an ice sheet drifts out over the ocean it is called a(n)

• iceberg

• snowfield

• firn

• ice shelf

When more snow is added than melts from a glacier it gets

• larger

• smaller

• wetter

• unchanged

The process that causes ice at the base of the glacier to melt and the glacier to then slide downhill is called

• snowline

• firn

• internal plastic flow

• basal slip

The process that causes glaciers to flow slowly as grains of ice deform under pressure and slide over each other is called

• snowline

• firn

• internal plastic flow

• basal slip