Show:
1 Air Masses / Fronts?
2 Air Masses / Fronts
3 Severe weather?
4 Weather Forecasts
Random
100
When cold and warm air masses meet but neither one can move the other.
Stationary Front
100
What is an air mass?
A large body of air with similar temperature, humidity,and air pressure.
100
A funnel-shaped cloud that touches Earth’s surface.
tornado
100
What does a barometer measure?
air pressure
100
A line on a weather map that connects places that have the same temperature.
Thermobars
200
The name of a cold, humid air mass.
Maritime Polar
200
What is a front?
The boundary between 2 different air masses.
200
How does a tornado form?
Different layers of air move at different speeds or in different directions
200
Lines on a map joining places that have the same air pressure.
Isobars
200
In the continental United States, air masses are commonly moved by jet streams and this type of global wind.
prevailing westerlies
300
A rapidly moving cold air mass overtakes a slow-moving warm air mass, the result is a(n)
A Cold Front
300
What are the three main kinds of fronts?
Warm front, cold front, and stationary front
300
Begins over warm ocean water as a low pressure area and grows in size and strength.
Hurricane
300
On weather maps, a line with half circles indicates
Warm Front
300
The prevailing westerlies, the major wind belts over the continental United States, generally push air masses from
west to east
400
A major difference between cyclones and anticyclones is a. their size. b. where they occur. c. the direction of their winds. d. how often they occur.
c. the direction of their winds.
400
What kind of weather would a continental tropical air mass that formed over northern Mexico bring to the southwestern United States?
hot and dry
400
Name three parts of a weather system
temperature, moisture, clouds, precipitation, air pressure, wind speed, and wind direction.
400
What does the capital H indicate on the weather map, and what will the conditions in that area likely be?
Area of high pressure; clear skies
400
Type of weather that usually follows a drop in air pressure.
Precipitation. (falling air pressure usually means and approaching low pressure area)
500
The properties of a Continental Tropical air mass.
Warm, and Dry
500
Moves quickly, can cause abrupt weather changes, including thunderstorms. After passing through cooler, drier air moves in.
Cold Front
500
Warm, dry air blows over large lakes and then over land.
Lake effect snow
500
How do forecasters make predictions on what the weather will likely be in the future?
By making inferences on how air, land, and the steps of the water cycle interact
500
High pressure centers of dry air in which winds spiral outward from the center.
Anticyclones