West Antarctic Glaciers: Irreversible Decline

What is the potential impact on global sea levels if the West Antarctic Ice Sheet were to melt completely?

• 1 foot rise

• 6 feet rise

• 2 feet rise

• 4 feet rise

What is the 'grounding line' in the context of glaciers?

• The edge of the glacier visible from space

• The dividing line between land and water under a glacier

• The line where glaciers meet the sky

• The point where glaciers start melting

How did researchers trace the grounding lines of glaciers?

• By measuring the temperature of the ice

• By analyzing radar images and glacier flexing motions

• By observing the color changes in the ice

• By drilling into the ice to find the lines

What happens when water gets underneath a glacier?

• The glacier becomes more stable

• The grounding line moves inland, accelerating melting

• The glacier melts slower

• The glacier stops moving

What is a 'pinning point' in the context of glacier movement?

• A location where glaciers melt faster

• A point where glaciers are most visible

• A bump in the bedrock that slows glacier movement

• A point where glaciers are anchored to the sky