Water Cycle
Water in the Air
Air Masses and Fronts
Severe Weather
Forecasting the Weather
100
The condition of the atmosphere at a certain time and place.
What is weather?
100
A collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs.
What is a cloud?
100
The boundary between two air masses.
What is an air front?
100
A usually brief, heavy storm that consists of rain, strong winds, lightning, and thunder.
What is a thunderstorm?
100
An instrument that measure and indicates temperature.
What is a thermometer?
200
A continuous movement of water from sources on Earth's surface.
What is the water cycle?
200
The ratio of the amount of water vapor in the air to the maximum amount of water vapor the air can hold at a set temperature.
What is relative humidity?
200
Its characteristics are cool and wet weather.
What are the characteristics of a maritime polar air mass?
200
An electric discharge that takes place between two oppositely charged surfaces.
What is lightning?
200
An instrument that measures atmospheric pressure.
What is a barometer?
300
When rain, snow, sleet, or hail falls from the clouds onto Earth's surface.
What is precipitation?
300
High altitude clouds made up of ice crystals.
What is a cirrus cloud?
300
When a warm air mass is caught between two colder air masses.
How does an occluded front form?
300
5 degrees and 20 degrees north and south.
What are the lines of latitude that a hurricane forms between?
300
An instrument used to measure wind speed.
What is an anemometer?
400
When water vapor cools and changes from a gas to a liquid.
What is condensation?
400
The temperature at which a gas condenses into a liquid.
What is dew point?
400
An area that has lower pressure than the surrounding areas and has winds that spiral towards the center.
What is a cyclone?
400
120 km/hr
What does the wind speed have to be to classify a tropical storm as a hurricane?
400
A small circle that shows the location of the weather station on a weather map.
What is a station model?
500
The loss of water vapor from plants.
What is transpiration?
500
Two factors that affect relative humidity.
What are the amount of water vapor in the air and the temperature?
500
This boundary between air masses often brings many days of cloudy, wet weather.
What is a stationary front?
500
From the condensation of water vapor.
How does a hurricane get its power?
500
Used to track precipitation.
What is Doppler radar?
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