Older Arctic Sea Ice Disappearing

The video explains the dynamics of Arctic ice, focusing on the thickness and age of ice. It describes how ice expands and contracts with the seasons, and how older ice moves and eventually melts in the North Atlantic. The Beaufort Sea plays a crucial role in ice aging, but recent years have seen less replenishment and more melting, transforming it from a nursery to a graveyard for older ice. The Arctic is now dominated by younger, thinner ice.

What is the relationship between the age of ice and its thickness?

• Younger ice is generally thicker.

• Age of ice does not affect its thickness.

• Older ice is generally thicker.

• Older ice is generally thinner.

What natural forces primarily move the older ice around the Arctic?

• Earthquakes and volcanic activity

• Animal migration patterns

• Winds and ocean currents

• Tides and gravitational pull

What is the Beaufort Gyre?

• A method of measuring ice thickness

• A region where ice melts rapidly

• A clockwise circulation of ice in the Beaufort Sea

• A type of ice formation

What recent change has been observed in the Beaufort Sea?

• It has become a nursery for young ice.

• It has become a major source of new ice.

• It has become a graveyard for older ice.

• It has stopped producing ice altogether.

What has happened to the oldest ice in the Arctic in recent years?

• It has increased in volume.

• It has almost disappeared.

• It has remained stable.

• It has become thicker.