CH 4 Flashcards
Evaporation
Is the process by which molecules of liquid water escape into the after becoming water vapor.
Water Cycle
The movement of water through the Earths systems, powered by the sun’s energy, is Water Cycle
Condensation
Is the process by which water vapor becomes liquid water.
Humidity
Is a measure of the amount of water vapor in the air.
Relative Humidity
Is the percentage of water vapor that is actually in the air compared to the maximum amount of water vapor the air can hold at a particular temperature.
Psychrometer
Has two thermometers, a wet-bulb thermometer and a dry-bulb thermometer.
Dew point
The temperature at which condensation begins is called the Dew Point
Cirrus
Wispy feathery clouds are called Cirrus
Cumulus
Clouds that look like cotton are called Cumulus
Stratus
Clouds that form in flat layers are known as Stratus
Air Mass
Is a huge body of air in the lower atmosphere that has similar temperature, humidity, and air pressure at any given height.
Tropical
Or warm, air masses form in the tropics and have low air pressure.
Polar
Or cold, air masses form north of 50 degrees
Continental
Air masses for over land.
Maritime
Air masses form over oceans
Jet Streams
Are bands of high-speed winds about 10 km above Earths surface.
Front
The boundary where the air masses meet becomes a Front.
Occluded
The warm air mass is cut off, warm cools and its water vapor condenses, the weather may turn cloudy and rain or snow may fall.
Cyclone
A swirling center of low air pressure is a Cyclone
Anticyclones
Are high-pressure centers of dry air, shown by an H on a weather map.
Storm
Is a violent disturbance in the atmosphere.
Thunderstorm
Is a small storm often accompanied by heavy precipitation and frequent thunder and lightning.
Lightning
Is a sudden spark, or electrical discharge, as these charges jump between parts of a cloud, between nearby clouds, or between a cloud and the ground.
Hurricane
Is a tropical cyclone with winds of 1119 km/h or higher.
Storm surge
A “dome” of water that sweeps across the coast where the hurricane lands.
Tornado
Is a rapidly whirling, funnel-shape cloud that reaches down from a thunderstorm to touch Earth’s surface.
Evacuate
You should be prepared to Evacuate.
Meteorologists
Are scientists who study and try to predict weather.
Isobars
Are lines joining places on the map that have the same air pressure.
Isotherms
Are lines joining places that have the same temperature.