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ch. 13 vocab project


Water Cycle the continual movement of water among Earth's atmosphere, oceans and land surface through evaporation, condensation, and precipitation.
Evaporation the process by which water molecules in liquid water escape into the air.
Humidity the amount of water vapor in a given volume of air.
Relative Humidity the percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature.
Psychrometer an instrument used to measure relative humidity, consisting of a wet bulb thermometer and a dry bulb thermometer.
Condensation the process by which molecules of water vapor in the air become liquid water
Dew Point the temperature in which condensation begins
Cirrus wispy, feathery clouds made mostly of ice crystals that form at high levels
Cumulus fluffy, white clouds, usually with a flat bottom, that look like rounded piles of cottton
Stratus clouds that form in flat layers and often cover much of the sky
Precipitation any form of water that falls from the clouds and reaches earths surface
Air Mass a huge body of air that has similar temperature, air pressure, and humidity at any given height
Tropical warm air masses
Polar cold air masses
Maritime humid air mass that forms over oceans
Continental dry air mass that forms over land
Front the boundary where unlike air masses meet but do not mix
Occluded cut off, as in a front where warm air mass is caught between two cooler air masses
Cyclone A swirling center of low air pressure
Anticyclone A high-pressure center of dry air
Storm A violent disturbance in the atmosphere
Thunderstorm A small storm often occompanied by heavy precipitation and frequent thunder and lightning
Lightning A sudden spark, or energy discharge, caused when electrical charges jump between parts of a cloud, between nearby clouds, or between a cloud and the ground
Tornado a rapidly whirling, funnel shaped cloud that reaches down from the storm to touch Earth's surface
Hurricane A tropical storm that has winds of about 119 km per hour or higher
Storm Surge A dome of water that sweeps across the coast where the hurricane lands
Meteoroligist a scientist who studies the causes of weather and tries to predict it.
Isobar A line on a weather map that joins places that have the same air pressure.
Isotherm a line on a weather map that joins places that have the same tenperature.
Created by: 073231