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Earth Cycles Vocabualry
Science Quiz
15
Science
8th Grade
02/15/2007

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Term
Water Cycle
Definition
the continuous process by which water moves form Earth's surface to the atmosphere and back, passing through the living and non-living parts of the environment.
Term
Carbon Cycle
Definition
system in which carbon is transfered form Earth's interior to the Earth's atmosphere, ocean,crust, and living things.
Term
Nirtogen Cycle
Definition
Nitrogen is removed from Earth's atmosphere fixed by soil bacteria and realesed in the atmoshere again.
Term
Nitrogen Fixation
Definition
nitrogen goes through process to purify it for our use.
Term
Evaporation
Definition
Molecules of liquid water to absorb energy and change to the gas state
Term
Condensation
Definition
Molecules of gas water absorb energy and change to the water state.
Term
Percipitation
Definition
forms of water (rain,hail,sleet and snow) falls from the clouds onto the Earth's surface.
Term
Groundwater
Definition
water that fills the cracks and pores in an underground soil and rock layers.
Term
Drought
Definition
A long period of little or no rain in one area.
Term
Photosynthesis
Definition
Plants and other organisms captur light energy and use it to make food from CO2 and H2O.
Term
Greenhouse gas
Definition
Gasses in the atmosphere that trap heat.
Term
Global Warming
Definition
a gradual increase in the temp. of the Earth's surface
Term
Ozone
Definition
Form of oxygen has 3 oxygen atoms in each molecule
Term
Ozone Layer
Definition
layer of the upper atmosphere about 30km above the Earth's surface
Term
Chlorofluorocarbons
Definition
groups of chlorine compounds formerly used in air conditioners and refrigetators
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