Global Air Circulation

What is the tri-cellular model in Earth's atmosphere?

• Simplified representation of global atmospheric circulation, divided into three major cells.

• A model describing wind.

• A weather model.

What drives the circulation of air in the tri-cellular model?

• Air pressure

• Wind

• Temperature differences

Which cell is located near the equator?

• Hadley

• Ferrel

• Polar

What is the primary characteristic of the Hadley cell?

• Cold dense air at the equator sinks.

• Warm, moist air near the equator rises.

• Cold, moist air sinks

In which direction does air move in the Hadley cell?

• From North to South

• From the equator towards to the poles.

• From the poles towards the equator.

Which cell is found between 30 and 60 degrees latitude?

• Hadley

• Ferrel

• Polar

What is the primary characteristic of the Ferrel cell?

• Mid-latitude, westerly winds.

• Snow storms

• Thunderstorms

IN what direction does air move in the Ferrel cell?

• West to East.

• North to South

• Westerly

What cell is located near the poles?

• Hadley

• Polar

• Ferrel

What is the primary characteristic of the Polar cell?

• Warm, dry air sinks.

• Warm air rises.

• Cold, dense air sinks