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Weather 1;1-1;2

TermDefinition
Weather The condition of Earth’s atmosphere at a particular time and place.
Atmosphere The layer of gasses that surrounds Earth.
Ozone A form of oxygen that has three oxygen atoms in each molecule instead of the usual two.
Water Vapor Water in the form of a gas.
Pollutants Harmful substances in the air, water, or soil.
Photochemical Smog A brownish haze that is a mixture of ozone and other chemicals, formed when nitrogen oxides,hydrocarbons, and other pollutants react with each other in the presence of sunlight.
Acid Rain Rain that contains more acid than normal
Density The amount of mass of a substance to a given volume.
Pressure The force pushing on an area or surface
Air Pressure A force that is the result of the weight of a column of air pushing down on an area.
Barometer An instrument used to measure changes in air pressure.
Mercury Barometer An instrument that measures changes in air pressure, consisting of a glass tube partially filled with mercury, with its open end resting in a dish of mercury. Air pressure pushing on the mercury in the dish forces the mercury in the tube higher.
Aneroid Barometer An instrument that measures changes in air pressure without using a liquid. Changes in the shape of an airtight metal box cause a needle on the barometer dial to move.
Altitude Elevation above sea level.
Troposphere The lowest layer of Earth’s atmosphere, where weather occurs.
Stratosphere The second-lowest layer of Earth’s atmosphere; the ozone layer is located in the upper stratosphere.
Mesosphere The middle layer of Earth’s atmosphere; the layer in which most meteoroids burn up.
Thermosphere The outermost layer of Earth’s atmosphere.
Ionosphere The lower part of the thermosphere, where electrically charged particles called ions are found.
Exosphere The outer layer of the thermosphere, extending outward into space.
Aurora Borealis A colorful, glowing display in the sky caused when particles from the sun strike oxygen and nitrogen atoms in the ionosphere; also called the Northern Lights.
Created by: krugeli
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