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At the Earth's surface, warm air expands and rises, leaving behind what is known as an area of _____; cold air is dense and sinks to the surface to create what is known as an area of _____. Your choices
answered
Aug 18, 2018
Physics
middle-school
5
votes
162k
views
Who is thurgood marshall
answered
Oct 16, 2017
History
middle-school
2
votes
110k
views
Which of the following are indications of a possible volcanic eruption? visible gases ground deformation tremors tornadoes heavy rain
answered
Sep 10, 2017
Physics
high-school
4
votes
191k
views
Numbers expressed using exponents are called
answered
Dec 15, 2016
English
middle-school
1
vote
92.9k
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