Understanding the Polar Vortex and Jet Stream

The video explains the polar vortex, a high-altitude wind circulation present in winter, and its potential to affect weather patterns. A weakened polar vortex can lead to a weaker jet stream, which may result in colder winters with more snow. The jet stream, a fast-moving air ribbon, influences weather by driving low-pressure systems from the Atlantic. When it weakens, it allows colder air from the Arctic to affect the weather.

What is the polar vortex?

• A low-pressure system

• A type of hurricane

• A fast-moving ribbon of air

• A circulation of winds high up in the stratosphere

How high above the Earth's surface is the polar vortex located?

• 6 or 7 miles

• 30 miles

• 10 miles

• 50 miles

What can happen when the polar vortex weakens?

• It can increase the Earth's temperature

• It can cause earthquakes

• It can break down and distort

• It can lead to stronger hurricanes

What is the jet stream?

• A high-pressure system

• A fast-moving ribbon of air

• A type of polar vortex

• A low-pressure system

How high above the Earth's surface is the jet stream located?

• 30 miles

• 50 miles

• 6 or 7 miles

• 10 miles

What does the jet stream drive off the Atlantic?

• High-pressure systems

• Hurricanes

• Tornadoes

• Low-pressure systems

What happens when the jet stream weakens?

• It increases the Earth's temperature

• It causes more hurricanes

• It strengthens the polar vortex

• It allows more chance for colder air from the Arctic

What is the potential result of a weaker polar vortex and jet stream?

• More hurricanes

• Increased rainfall

• Colder, maybe snowy winters

• Warmer winters