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Weather test 1 - Jones Earth Science
Terms in this set (34)
the condition of Earth's atmosphere at a particular time and place.
4 main gases in the atmosphere
nitrogen, oxygen, carbon dioxide, and water vapor
harmful substances in the air, water, or soil
Most air pollution comes from
the result of burning fossil fuels such as coal,oil, gas, and diesel fuel
Particles in the air come from natural sources and
Causes acid rain
nitrogen oxides and sulfuric oxides combining with water in the air to form nitric acid and sulfuric acid.
the force pushing on an area or surface
Air pressure is
the result of the weight of a column of air pushing down on an area
Force of air pressure per square inch
14.7 lbs per square inch (at sea level)
A barometer is
an instrument that measures air pressure
Air pressure _________ as altitude increases
As air pressure decreases, density _________
the inner/lowest of earths atmosphere. Where earths weather occurs.
extends from the top of the troposphere to about 50 kilometers above Earth's surface. It's cold for the most part, but the upper part is warm because it absorbs the heat from the sun.
above the stratosphere, the middle of the atmosphere. It protects the earths surface from getting hit by meteoroids.
near the top, the air is very thin. Energy coming from the sun strikes it first. Nitrogen and oxygen molecules convert energy from the sun into heat.
outer layer of the thermosphere. Satellites orbit here.
the transfer of energy by electromagnetic waves
a measure of the average energy of motion of the particles of a substance.
the direct transfer of heat from one substance to another substance that it is touching.
the transfer of heat by the movement of a fluid
How the troposphere is is heated
the sun heats the surface with radiation and conduction, then convection moves the heat throughout the troposphere
differences in air pressure
the effect of Earth's rotation on the direction of winds and currents.
3 major global wind belts
trade winds, polar easterlies, prevailing westerlies
Jet streams are
bands of high speed winds
the process of water molecules in a liquid escaping into the air as water vapor
Relative humidity is
the percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature
the process by which molecules of water vapor in the air becomes liquid water
The dew point temperature is
below the freezing point
any form of water that falls from clouds and reaches Earth's surface.
Clouds that produce hail
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