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29 Cards in this Set

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Water Cycle

The continuous movement of water between the atmosphere and Earth's surface is called the water cycle.

Evaporation


Evaporation is the process by which water molecules in liquid water absorb energy and escape into the air as water vapor.

Humidity

Humidity is a measure of the amount of water in the air.

Relative Humidity

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

A psychrometer had two thermometers, a wet-bulb thermometer and a dry bulb thermometer.

Condensation

Molecules of water vapor in the air become liquid water in the process of condensation.

Dew Point

The temperature at which condensation begins is called the dew point.

Cirrus

Wispy, feathery clouds are known as cirrus.

Cumulus

Clouds that look like fluffy, rounded piles of cotton are called cumulus.

Stratus

Clouds that form in flat layers are called stratus.

Precipitation

Precipitation is any form of water that falls from the clouds and reached Earth's surface.

Air mass

A huge body of air that has similar temperature, humidity, and air pressure at any given height is called an air mass.

Tropical

Tropical, or warm, air masses from in the tropics and have low air pressure.

Polar

Polar, or cold, air masses form North of 50˚ North latitude and south of 50˚ south latitude.

Maritime

Maritime air masses form over oceans.

Continental

Continental air masses form over land.

Front

The boundary where the air masses meet becomes a front.

Occluded

The warm air mass is cur off, or occluded, from the ground.

Cyclone

A swirling center of low air pressure is called a cyclone.

Anticyclone

Anticyclones are high-pressure centers of dry air.

Storm

A storm is a violent disturbance in the atmosphere.

Thunderstorm

A thunderstorm is a small storm often accompanied by heavy precipitation and frequent thunder and lighting.

Lightning

Lightening is a sudden spark, or electric discharge, as these charges jump between parts of a cloud, between nearby clouds, or between a clouds and the ground.

Tornado

A tornado is a rapidly whirling, funnel-shaped cloud that reaches down from a storm cloud to touch Earth's surface.

Hurricane

A hurricane is a tropical cyclone that has winds of 119 kilometers per hour or higher.

Storm Surge

A dome of water that sweeps across the coast where the hurricane lands.

Meteorologist

Meteorologist are scientist who study the causes of weather and try to predict it.

Isobar

Isobars are line joining places on the map that have the same air pressure.

Isotherm

Isotherms are line joining places that have the same temperature.