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Ch.12 Test & Quiz
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14
Science
7th Grade
04/25/2011

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Term
atmosphere
Definition
the layer of gases surrounding Earth - provides Earth with all the gases necessary to support life.
Term
aerosols
Definition
solids such as dust, salt, and pollen, and tiny liquid droplets such as acids in the atmosphere are called ____
Term
troposphere
Definition
is the atmospheric layer closest to Earth's surface
Term
water cycle
Definition
Earth's water is in constant motion in a never-ending process called ____
Term
weather
Definition
describes the current condition of the atmosphere
Term
humidity
Definition
the amount of water vapor in the atmosphere
Term
dew point
Definition
temperature at which saturation and condensation occur.
Term
relative humidity
Definition
is a measure of the amount of water vapor that is present compared to the amount that could be present at a specific temperature.
Term
precipitation
Definition
when drops of water or crystals of ice become too large to be suspended in a cloud, they fall as ___
Term
air mass
Definition
is a large body of air that develops over a particular region of Earth's surface
Term
front
Definition
where air masses of different temperature meet, a boundary between them, called a ___, is created.
Term
tornado
Definition
is a violent, whirling wind that moves in a narrow path over land
Term
hurricane
Definition
large storm that begins as an area of low pressure over tropical oceans.
Term
Water Cycle Diagram
Definition
REFER TO THE WATER CYCLE DIAGRAM.
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