Air Masses and Fronts
Weather Maps
Ocean Currents - Surface
Ocean Currents - Deep
100

A very large volume of air that has a certain temperature and moisture content.

What is... an air mass

100

This is the abbreviation for the air mass Maritime Tropical.

What is... mT
100

Horizontal, stream-like movements of water that are found at or near the surface of the ocean.

What is... surface currents

100
These are movements of ocean water far below the surface.

What is... deep currents

200

These two variable determine the classification of an air mass.

What is... water content and air temperature

200

This is the word that describes a dry air mass.

What is... continental
200

These three factors affect surface currents.

What is... global winds, the Coriolis effect, and continental deflections

200

These two factors determine the deep currents.

What is... density and salinity

300

These are the four different fronts that can occur when two air masses meet.

What is... warm, cold, occluded, and stationary

300

Cold air masses bring this kind of weather during the summer.

What is... cool and dry with fog

300
Global winds blow this direction near the equator.

What is... east to west

300

This is the deepest and densest water in the ocean.

What is... the Antarctic Bottom Water

400

These are the four different air masses that are found in the United States.

What is... continental polar, maritime polar, maritime tropical, and continental polar

400
Continental Polar air masses form in this area of the world.

What is... northern Canada

400

Surface currents do this when they meet continents.

What is... deflect

400

Deep currents form when these two things happen.

What is... density increases and it sinks toward the bottom of the ocean
500

This front is formed when a warm air mass is caught between two cold air masses.

What is... an occluded front
500

Warm fronts bring this kind of weather.

What is... light rain, followed by clear and warm weather

500

This is the deflection of moving objects from a straight path because of the Earth's rotation.

What is... the Coriolis effect

500

These are the three main ways that ocean water density can increase.

What is... decreasing temperature, increasing salinity through freezing, and increasing salinity through evaporation