The process by which molecules of water escape into the air as water vapor.
What is evaporation?
100
Hailstones form only in this type of cloud.
What are cumulonimbus clouds?
100
Air masses that form over land.
What are continental air masses?
100
The storms that produce the highest winds.
What is a hurricane?
100
Predicting the weather with great accuracy a month in advance.
What is not very likely?
200
The process by which water vapor in the air becomes liquid water and forms clouds.
What is condensation?
200
The most common type of precipitation.
What is rain?
200
A huge body of air that has similar temperature, humidity, adn air pressure ar any given height.
What is an air mass?
200
The sudden discharge of electricity in a storm.
What is lightning?
200
Lines on a weather map joining aread what have the same temperature.
What are isotherms?
300
A measure of the amount of water vapor in the air.
What is humidity?
300
When raindrops freeze as they fall.
What is sleet?
300
Air masses that form over oceans.
What are maritime air masses?
300
The boundary where air masses meet.
What is a front?
300
Polar easterlies push air masses across the United States from this direction.
What is east?
400
Clouds that form high in the atmosphere and are wispy.
What are cirrus clouds?
400
The number of sides or branches every snowflake has.
What is six?
400
A high pressure center of dry air.
What is an anticyclone?
400
This weather event occurs when a warm air mass travels north from the Gulf of Mexico and a cold dry air mass moves south from Canada, slamming into each other in the Great Plains.
What is a tornado?
400
Lines on a weather map that join places with the same air pressure.
What are isobars?
500
The percentage of water vapor that is actually in the air compared to the maximim amout of water vapor the air can hold at a particular temperature.
What is relative humidity?
500
When rain falls through cold air near the ground and freezes as soon as it touches a cold surface.
What is freezing rain?
500
This forms when a warm air mass overtakes a slowly moving cold air mass.
What is a warm front?
500
A tropical cyclone with wind speeds of at least 119 km per hour.