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Bair,Atmosphere

Bair, Chapter 1: The Atmosphere

Question/Vocab. wordAnswer
weather the condition of earth's atmosphere at a particular time and place
atmosphere the envelope of gases that surrounds the planet
ozone a form of oxygen that has three oxygen atoms in each molecule
water vapor water in the form of a gas
density the amount of mass in a given volume
pressure the force pushing on an area or surface
air pressure the result of the weight of a column of air pushing down on an area
barometer an instrument that is used to measure air pressure
mercury barometer a glass tube open at the bottom end and partially filled with mercury; measures air pressure
aneroid barometer an airtight metal chamber sensitive to changes in air pressure
altitude elevation; distance above sea level; the average of the surface of the oceans
list three factors affecting air pressure temperature, altitude, water vapor content
troposphere the layer of the atmosphere in which Earth's weather occurs
What is the rate at which temperature decreases in the troposphere? drops 6.5 degrees celsius for every kilometer in altitude
stratosphere second layer of atmosphere; contains the ozone layer
Describe the temperature change in the stratosphere Temperature begins very cold (-60 c) but warms with increasing altitude due to the ozone layer
mesosphere middle layer of the atmosphere
What is a main characteristic of the mesosphere protects earth's surface from being hit by most meteoroids.
Define: Thermosphere outermost layer; has no definate outer limit; thermo- means heat
Describe the Ionosphere lower part of the thermosphere; engery from sun causes gas molucules to become electrically charge particles called ions; auroras occur; radio waves bounce here
Describe the Exosphere Outer layer of thermosphere;
Created by: jlbair
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