Cosmic Journeys: Greenland's Melting Ice

Greenland's ice sheet is a critical indicator of climate change, with 81% of its land covered by ice. Scientists study its dynamics using radar and drilling to understand past and present melting patterns. The ice sheet's gravitational pull affects sea levels, and extreme melting could lead to significant global sea level rise. Historical climate conditions, like the Eemian period, provide insights into current changes. Observations show rapid glacier movement and ice loss, with potential acceleration due to surface meltwater. Understanding these processes is vital for predicting future climate impacts.

What percentage of Greenland is covered by ice?

• 90%

• 100%

• 81%

• 50%

What geological period is responsible for shaping Greenland's mountains?

• Cretaceous

• Quaternary

• Pleistocene

• Holocene

What tools do scientists use to study the layers of Greenland's ice?

• Radar and deep drilling

• Sonar and GPS

• Seismographs and thermometers

• Satellite imagery and drones

During which period did the last Ice Age begin?

• 12,000 years ago

• 200,000 years ago

• 70,000 years ago

• 100,000 years ago

What is the main cause of the current retreat of Greenland's glaciers?

• Rising ocean temperatures

• Volcanic activity

• Increased snowfall

• Earthquakes

What is the process called when icebergs break off from glaciers?

• Calving

• Fracturing

• Shearing

• Splitting

How much ice does the fastest moving glacier in Greenland lose each year?

• 50 billion tons

• 10 billion tons

• 20 billion tons

• 35 billion tons

What is the potential global sea level rise if Greenland's ice melts significantly?

• 5 meters

• 10 meters

• 3 meters

• 7 meters

What phenomenon could accelerate the melting of Greenland's ice?

• Increased snowfall

• Surface meltwater ponds

• Volcanic eruptions

• Earthquakes

What is the main focus of ongoing scientific monitoring in Greenland?

• Plant growth

• Volcanic activity

• Ice sheet dynamics

• Animal migration