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8th grade - Chapter 17
The Atmosphere:Structure and Temperature
23
Science
Not Applicable
07/27/2005

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Term
ozone
Definition
a form of oxygen that has three oxygen atoms in each molecule instead of teh usual two

gas that occurs naturally in the stratosphere - absorbs 99% of the UV radiation from sun
Term
Try Some More Terrific Enchiladas

OR

Traiing So Many Talented Elephants
Definition
Troposphere, stratopshere, Mesosphere, Thermosphere, exosphere
Term
Troposphere
Definition
the bottom layer of the atmosphere;
where we live;
temperature gets lower the higher up you go

75% of the atmospheric gasses, dust, ice and liquid water,
Term
stratosphere
Definition
the second layer of the atmosphere
layer of ozone exists here -
jet stream occurs here - temperature increases with altitude
Term
mesosphere
Definition
middle layer of the atompshere where temperature decreases with altitude
Term
Thermosphere
Definition
outermost layer of the atmosphere;
starting from 80 km to the beginning of space- contains the IONOSPHERE-
Term
exosphere
Definition
Upper most part of the atmosphere - space shuttle orbits here
Term
ionosphere
Definition
a layer of the Earth's atmosphere where ions and free electrons absorb AM radio waves during the day and reflect them back toward earth at night
Term
ozone layer
Definition
an atmospheric layer with a high concentration of ozone. - located in the stratosphere- shields us from harmful energy from the sun
Term
conduction
Definition
the direct transfer of heat energy from ONE SURFACE TO ANOTHER
Term
convection
Definition
the transfer of heat energy in a fluid (gas or liquid). - a system of warm air rising and cool air sinking - makes convection currents
Term
summer solstice
Definition
1st day of summer and longest sunlight
Term
winter solstice
Definition
1st day of windter and shortest sulight
Term
spring equinox
Definition
first day of spring = March 21
equal hours of day and night
Term
autumnal equinox
Definition
first day of fall= september 21
equal day and equal night
Term
heat
Definition
the energy transferred from one object to another because of difference in their temperatrues
Term
temperature
Definition
is a measure of the average amount of energy each particle of a substance has while its moving.

measures how hot or bold a substance is
Term
radiation
Definition
the ransfer of heat energy through empty space
Term
reflection
Definition
occurs when light bounces off an object
Term
scattering
Definition
reflection of light in all directions
Term
Greenhouse effect
Definition
the process by which heat is trapped in the atmosphere by gases that form a "blanket" around Earth
Term
albedo
Definition
is the part of toal radiation that is reflected by any surface
Term
isotherm
Definition
curved line that connect locations on a weather map with the same temperature
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