Weather Test Study Guide
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Vocabulary flashcards based on key concepts from the weather study guide.
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21 Terms
Air
The mixture of gases that form the atmosphere of the Earth.
Atmosphere
A layer of gases surrounding a planet, held by gravity.
Air Pressure
The weight of air pressing down on Earth, which changes from place to place.
High Pressure System
A whirling mass of cool, dry air that brings fair weather and sunny skies.
Low Pressure System
A whirling mass of warm, moist air that generally brings cloudy skies and possible precipitation.
Barometer
An instrument that measures air pressure.
Isobar
A line on a weather map connecting equal points of pressure.
Wind
The movement of air above the surface of the Earth, caused by convection currents.
Convection
The transfer of heat in liquids and gases due to differences in temperature and density.
Sea Breeze
A wind that blows from the sea to the land during the day, caused by temperature differences.
Land Breeze
A wind that blows from the land to the sea during the night, caused by temperature differences.
Air Mass
A large amount of air that sits in one place for several days, taking on the traits of the land or water below it.
Cold Front
A boundary where a cold air mass replaces a warm air mass, typically causing strong storms.
Warm Front
A boundary where a warm air mass slowly replaces a cold air mass, usually resulting in extended cloudiness and precipitation.
Precipitation
General term for water in any form falling from clouds, such as rain, snow, or hail.
Humidity
The amount of water vapor in an air mass.
Dew Point
The temperature at which water vapor condenses to form clouds.
Meteorologist
A scientist who studies and predicts the weather.
Weather
The condition of the air at a specific time and place, including temperature, pressure, and humidity.
Convection Currents
Air currents caused by the movement of different temperatures and densities of air.
Pressure Systems
Descriptions of air masses characterized by high or low air pressure, affecting weather patterns.