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Earth Science (Tarbuck) 12 Ed. Chapter 16
Chapter 16 in Earth Science by Tarbuck, Lutgens, and Tasa
50
Science
Undergraduate 1
02/03/2011

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Term
weather
Definition
refers to the state of the atmosphere at a given time and place
Term
climate
Definition
the average weather based on the character of an area, variations, and extremes
Term
elements
Definition
quantities or properties that are measured regularly
Term
air
Definition
a mixture of many discrete gases, each with its own physical properties, in which varying quantities of tiny solid and liquid particles are suspended
Term
basic elements of weather
Definition
air temperature, humidity, type and amount of cloudiness, type and amount of precipitation, air pressure, and the speed and direction of the wind
Term
aerosols
Definition
tiny solid and liquid particles suspend in the air
Term
ozone
Definition
a form of oxygen that combines three oxygen atoms into each molecule (O3)
Term
stratosphere
Definition
above the troposphere, the temperature remains constant to a height of about 20 km and then gradually increases until the stratopause
Term
troposphere
Definition
the bottom layer of the atmosphere in which we live, where temperature decreases with an increase in altitude
Term
environmental lapse rate
Definition
temperature decrease in the troposphere
Term
normal lapse rate
Definition
6.5ºC per kilometer
Term
radiosonde
Definition
an instrument package that is attached to a balloon and transmits data by radio as it ascends through the atmosphere
Term
tropopause
Definition
outer boundary of the troposphere
Term
stratopause
Definition
the height where the stratosphere temperature stops increasing, nearly 50 km above Earth's surface
Term
mesophere
Definition
the third layer where temperatures again decrease with height until the mesopause
Term
mesopause
Definition
more than 80 km above the Earth's surface, the temperature approaches -90ºC (-130ºF)
Term
thermosphere
Definition
the fourth layer above the mesophere, the layer contains only a tiny fraction of the atmosphere's mass
Term
rotation
Definition
the spinning of the Earth about its axis, one rotation every 24 hours
Term
circle of illumination
Definition
the line separating the dark half of Earth from the lighted half
Term
revolution
Definition
refers to the movement of the Earth in its orbit around the sun, one revolution every 365 days
Term
inclination of the axis
Definition
Earth's axis is tilted 23.5 degrees from the perpendicular
Term
Tropic of Cancer
Definition
north latitude 23.5º
Term
summer solstice
Definition
the first official day of summer
Term
Tropic of Capricorn
Definition
south latitude 23.5º
Term
winter solstice
Definition
first day of winter
Term
autumnal equinox
Definition
the first day of autumn
Term
spring equinox
Definition
the first day of spring
Term
heat
Definition
energy possessed by a material arising from the internal motions of its atoms or molecules OR refers to the quantity of energy present
Term
temperature
Definition
related to the average kinetic energy of a material's atoms or molecules OR refers to the intensity or the degree of hotness
Term
conduction
Definition
the transfer of heat through matter by molecular activity
Term
convection
Definition
the transfer of heat by mass movement or circulation within a substance
Term
radiation
Definition
heat-transfer mechanism by which solar energy reaches our planet because only radiation can travel through the vacuum of space

also known as electromagnetic radiation
Term
electromagnetic waves
Definition
waves of radiant energy
Term
wavelength
Definition
the distance from one crest to the next
Term
visible light
Definition
the only portion of the light spectrum that we can see
Term
infrared radiation
Definition
located adjacent to red; we cannot see but we can detect as heat
Term
ultraviolet
Definition
closest invisible waves to violet; responsible for sunburn
Term
basic laws of radiation
Definition
1) All objects, at whatever temperature, emit radiant energy.
2) Hotter objects radiate more total energy per unit area than do colder objects
3) The hotter the radiating body, the shorter the wavelength of maximum radiation.
4) Objects that are good absorbers of radiation are good emitters as well.
Term
reflection
Definition
the process whereby light bounces back from an object at the same angle at which it encounters a surface and with the same intensity; responsible for the redirecting incoming solar radiation
Term
scattering
Definition
produces a larger number of weaker rays that travel in different directions; responsible for the redirecting incoming solar radiation
Term
albedo
Definition
the fraction of the total radiation that is reflected by the surface; on Earth 30%
Term
diffused light
Definition
the result of small dust particles and gas molecules in the atmosphere that scatter incoming solar radiation in all directions
Term
terrestrial radiation
Definition
longer wavelengths emitted by Earth
Term
greenhouse effect
Definition
gases in the atmosphere absorb terrestrial radiation, which warms them; some of the energy is then returned to the Earth, which warms it
Term
isotherm
Definition
a line that connects points on a map that have the same temperature
(iso = equal, therm = temperature)
Term
temperature gradient
Definition
amount of temperature change per unit of distance
Term
temperature control
Definition
any factor that causes temperature to vary from place to place and from time to time
Term
specific heat
Definition
amount of energy needed to raise 1 gram of a substance 1ºC
Term
windward coast
Definition
a coastal location where prevailing winds blow from across the ocean onto the shore
Term
leeward coast
Definition
a coastal location where the prevailing winds blow from the land toward the ocean
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