Understanding Glaciers and Climate Change

Glaciers have shaped the Earth for millions of years, but climate change is causing them to disappear, affecting landscapes, oceans, and weather. Glaciers are large ice masses that move slowly over land and are classified into alpine glaciers and ice sheets. They form over years as snow accumulates and compresses into glacial ice. Glaciers provide resources like freshwater and fertile soil. They also serve as indicators of climate change, with melting ice contributing to rising sea levels and altering ecosystems. The rapid melting of glaciers signals the urgency of addressing global warming.

What is the primary effect of climate change on glaciers?

• They are becoming more stable.

• They are disappearing.

• They are moving faster.

• They are expanding rapidly.

Which type of glacier forms on mountainsides and moves through valleys?

• Continental glaciers

• Ice sheets

• Alpine glaciers

• Polar glaciers

What is the largest type of ice sheet called?

• Mountain glacier

• Valley glacier

• Continental glacier

• Alpine glacier

What is the term for the dense, grainy ice that survives a year's melt cycle?

• Firn

• Snowpack

• Permafrost

• Glacial ice

What process allows glaciers to move under their own weight?

• Sublimation

• Evaporation

• Compression melting

• Condensation

What is a significant resource provided by glaciers?

• Freshwater

• Petroleum

• Natural gas

• Saltwater

How do glaciers contribute to rising sea levels?

• By absorbing more sunlight

• By melting and adding freshwater to the ocean

• By expanding and displacing seawater

• By increasing evaporation rates

What could be a consequence of less salt in the ocean due to glacier melt?

• Higher ocean temperatures

• Disturbance of the gulf stream

• More frequent hurricanes

• Increased ocean acidity

Why are glaciers considered indicators of climate change?

• They are unaffected by temperature changes.

• They reflect sunlight back into space.

• They are sensitive to temperature changes.

• They grow larger in warmer climates.

What might happen to alpine glaciers if global warming continues unchecked?

• They could disappear completely.

• They will remain unchanged.

• They will expand significantly.

• They will become more stable.