Instruments
Measures temperature
What is a thermometer?
What is air pressure?
Happens when a cold air mass replaces a warm air mass
What is a cold front?
The way the map symbols for fronts point
What is the direction front is moving?
This pressure forces air downward toward the Earth's surface
What is a high pressure?
Measures air pressure
What is a barometer?
Exerts more force on a barometer
What is high pressure?
Happens when a warm air mass is replacing a cold air mass
What is a warm front?
These characteristics are basically the same in air masses
What are humidity and temperature?
Cloudy, stormy skies, strong winds spiraling counter clockwise, warm moist air accompany this
What is a low pressure system?
Carries instruments into atmosphere
What is a weather balloon?
What is low pressure?
What is a stationary front?
The way air masses are named
What is for the air mass that is replacing the other?
Sunny, clear skies, calm winds that spiral clockwise, and cool dry air accompany this
What is a high pressure system?
Measures wind directions and shows direction on weather maps
What is a wind vane or compass rose?
29.92 Hg
What is average barometric pressure?
Happens when two cold air masses meet at a warm air mass and push it up
What is an occluded front?
What is a maritime air mass?
These are winds that start at equator and blow toward poles; blow from west to east
What are westerlies?
Measures wind speed
What is an anemometer?
Line connecting points of equal air pressure on a weather map
What is an isobar?
Happens when cool air mass approaches from the east or northeast and replaces a warm air mass
What is a back door cold front?
Air mass that originates over land
What is a continental air mass?
These winds blow from the poles toward equator; start in east and blow toward west
What are easterlies?