Air Masses
Fronts
Lines on a Map
Symbols
Forecasts
100

The two characteristics of air masses.

What are temperature and moisture?

100
Form when two different large air masses meet and usually bring changes in the weather.
What are fronts?
100
Marked on weather maps as a blue line with triangles on it.
What is a cold front?
100

The capital letter H stands for this on a weather map.

What is a high pressure center?

100

The name given to a scientist that studies weather.

What is a meteorologist?

200
An air mass that is dry and forms over land.
What is a continental air mass?
200
A type of front made of cold, dense air. Rain, snow, thurnderstorms and sometimes tornadoes are caused by this front. Usually, the precipitation does not last very long.
What is a cold front?
200
Marked on a weather map as a red line with half circles on it.
What is a warm front?
200

A capital letter L stands for this on a weather map.

What is a low pressure center?

200

This instrument is used to measure wind speed.

What is an anemometer?

300

An air mass that forms over the polar regions and is cold.

What is a polar air mass?

300
The front that forms when two air masses meet and neither one takes over. Often causes many cloudy days to occur in a row.
What is a stationary front?
300

Marked on a weather map as a blue line with blue triangles on one side and red half circles on the other side.

What is a stationary front?

300

Represented by a small circle that is completely white (not colored in).

What is clear skies?

300
The type of weather forecast that is within the next 5 days.
What is a short-range weather forecast?
400
An air mass that forms over the tropics and is warm.
What is a tropical air mass?
400
The type of front formed when a large mass of warm air takes over the cooler air mass. Usually produce rain, fog, or snow that lis light but steady.
What is a warm front?
400

This stem is added to the symbol for cloud cover shows to show the direction of what.

What is wind direction?

400

Often represented by asterisks or stars on a weather map.  (especially when it is cold)

What is snow?

400

This is the movement of air caused by differences in air pressure.

What is wind?

500
An air mass that is wet and forms over water.
What is a maritime air mass?
500
The type of front that develops when two cool air masses merge, forcing the warm air to rise and become trapped. Usually brings wind and preciptiation.
What is an occluded front?
500

Marked on the weather map as a purple line with half circles and triangles on the same side.

What is an occluded front?

500

This is an air mass that forms over northern Canada.

What is a continental polar air mass.  (cPa0

500

True or False:  A hot air balloon rises because it is filled with helium.

What is false?

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