Causes of weather
Weather Instruments
Air, air, air
Weather
Climate
100

Edge of a cool air mass; brings  a line of showers or thunder storms 

What is a cold front?

100
An important instrument in tracking tornadoes.
What is Doppler radar?
100
What type of air exists in a continental polar air mass?
What is cold, dry air?
100

What must happen for a tornado to form?

Layers of wind in a storm must blow at different speeds in different directions.

100
What does the "H" on a weather map stand for?
A region of high pressure.
200

Edge of a warm air mass; brings heavy rain

What is a warm front?

200
Measures wind speed.
What is an anenometer?
200
Why is cool air heavier than warm air?
Gas particles in cool air are closer together than those in warm air.
200
What is the source of a hurricane's energy?
warm ocean water
200
The boundary between two air masses.
What is a front?
300

Air current that affects weather in North America 

What is a Jet Stream?
300
Measures the direction of wind.
What is a wind vane?
300
Causes air pressure.
What is gravity?
300
The weight of air pushing down on an area.
What is air pressure (or atmospheric pressure)?
300
The uneven heating of the Earth by the Sun results in temperature differences around the world which results in the rising and sinking of air in a circular pattern called _______________.
What are convection currents?
400
Warm water current that warms coastal weather 

What is Gulf Stream?

400
Measures the amount of air pressure in the atmosphere.
What is a barometer?
400
What happens to air pressure as you move up in the atmosphere?
It decreases, or goes down.
400
The place where the Sun's rays shine at the most direct angle.
What is the equator?
400
A large body of air with similar properties throughout it.
What is an air mass?
500

The cycle that moves water across the planet and throughout the atmosphere 

What is the water cycle?

500
Measures the amount of precipitation, or rain.
What is a rain gauge?
500

What will happen to warm air that is surrounded by cold air?

The warm air will rise.

500
These can affect the climate of an area.
What is ocean currents?
500
Brings warmer air into an area.
What is a warm front?
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