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chapter 17
study guide
18
Meteorology
9th Grade
02/07/2013

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Cards

Term
what produces a variety of weather
Definition
combination of earths motions and energy from the sun
Term
what is climate based on
Definition
climate is based on observations of weather that have been collected over many years, climate helps describe a place or region
Term
what is air a mixture of
Definition
air is a mixture of different gases and particles each with its own physical properties, the composition of air varies from time to time and from place to place
Term
what two gases make up 99 percent of dry air
Definition
nitrogen and oxygen make up 99 percent of the volume of clean, dry air
Term
what gas plays a significant role in heating the atmosphere
Definition
carbon dioxide is an active absorber of energy given off by earth
Term
what is the source of all clouds and precipitation
Definition
water vapor
Term
what are some particles that remain suspended for long periods of time
Definition
sea salts from breaking waves, fine soil blown into the air, smoke and soot from fires,pollen µorganisms lifted by the wind, & ash & dust from volcanic eruptions
Term
when do oxygen atoms split into single atoms of oxygen
Definition
taviolet radiation emitted from the sunhey split when they absorb ultr
Term
what does ozone absorb
Definition
ozone absorbs harmful uv radiation from the sun
Term
what accounts for nearly half the primary pollutants by weight
Definition
emissions from transportation vehicles
Term
what are secondary pollutants
Definition
they are not directly into the air, they form in the atmosphere when reactions takeplace among primary pollutants and pther substances
Term
what are photochemical reactions
Definition
reactions triggered by strong sunlight
Term
what is atmospherere pressure
Definition
is simply the weight of the air above
Term
how many layers is the atmosphere divided into
Definition
4
Term
in what layer do most weather occur
Definition
troposphere
Term
where does most energy that drives weather and climate coe from
Definition
sun
Term
what creates winds and dives the oceans currents
Definition
it is the unequal heating that creates winds of eartheating and drives the ocean currents
Term
what is rotation
Definition
is the spinning of earth about its axis
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