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19 Cards in this Set

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  • Back
atmospheric pressure
the force exerted by the outside air pressure
barograph
an instrument that keeps a continuous rocord of the changes in atmospheric pressure
barometer
an instrument that measures air pressure
barycenter
the common center of gravity round which the earth and moon rotate
basalt
a dark colored, smooth egneous rock; very abundant near the earth's surface and ocean floor
batholith
a huge mass of coarse-grained igneous rock that forms deep in the cores of mountain ranges
bench mark
a round metal plate that indicates the grounds elevation above sea level; indicated by BM
black holes
invisible objects in space; so dense that their gravitational forces do not let light escape
carbon dating
method of dating a substance based upon the rate of decay of radioactive carbon - 14 into nitrogen
carbon dioxide
plants take it in
carbonic acid
weak acid formed when carbon dioxide and water combine chemically
cenozoic era
age of the mammals
chemical weathering
changes in theory composition
chromosphere
photosphere
cinder cone
cone shaped
cirque lake
when the glacier that carved a cirque melts
cirques
bowl shaped depressions carved
climate
the average of general weather conditions
coal
rock formed from the remains..carbon