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37 Cards in this Set
- Front
- Back
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weather |
the condition of earth's atmosphere at a particular time and place |
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atmosphere |
the envelope of gases that surrounds the planet |
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water vapor |
water in the form of a gas |
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density |
the amount of mass in a given volume |
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air pressure |
the weight of a column of air pushing on an area |
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barometer |
an instrument used to measure air pressuree |
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mercury barometer |
a long glass tube with one end open and the other closed |
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aneroid barometer |
has an airtight metal chamber that is sensitive to air pressure |
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altitude |
elevation, the distance above sea level |
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troposphere |
inner, lowest layer of earth's atmosphere |
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stratosphere |
the second layer of earth's atmosphere |
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mesosphere |
the middle layer of the atmosphere |
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thermosphere |
the outermost layer of the atmosphere |
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ionosphere |
the lower layer of the thermosphere |
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exosphere |
the outer layer of the thermosphere |
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electromagnetic waves |
a form of energy that can move through a vacuum of space |
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radiation |
a direct transfer on energy by electromagnetic waves |
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infared radiation |
electromagnetic engery that has wavelengths longer than the wavelengths for red light |
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ultraviolet radiation |
an invisible form of energy with wavelengths that are shorter than wavelengths for violet light |
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scattering |
dust-sized particals and gases in the atmosphere disperse light in all directions |
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greenhouse effect |
gases that turn hold heat in earth's atmosphere |
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thermal energy |
total energy of a motion in the particals of a substance |
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thermometer |
a device that measures temperature |
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convection |
tranfer of heat by the movement of a fluid |
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conduction |
transfer of heat between two substances that are in direct contact |
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convection currents |
the upward movement of warm air and the downward movement of cool air |
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wind |
movement of air parallel to earth's surface |
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anemometer |
three or four cups at the end of spokes that spin on an axle |
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windchill factor |
increased cooling that a wind can cause |
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local winds |
winds that blow over short distances |
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global winds |
winds that blow steadily from specific directions over long distances |
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coriolis effect |
the way earth's rotation makes winds curve |
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lattitude |
the distance from the equator measured in degrees |
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sea breeze |
local wind that blows from an ocean or lake |
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land breeze |
flow of air from land to a body of water |
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temperature |
average amount of energy of a motion for each partical |
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heat |
thermal energy that is transferd from a hotter object to a cooler one |
