Coal, gas, and oil are ______________ fuels.
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Air currents are sometimes called updrafts or downdrafts.
Air currents are sometimes called updrafts or downdrafts.
Air pollution results from ______________ combustion of impu…
Air pollution results from ______________ combustion of impure fuels.
The four basic types of clouds are cirrus, cumulus, stratus,…
The four basic types of clouds are cirrus, cumulus, stratus, and __________.
The process that effectively regulates Earth’s average tempe…
The process that effectively regulates Earth’s average temperature is
The two processes of raindrop formation are the Bergeron pro…
The two processes of raindrop formation are the Bergeron process and __________.
The direction of a wind is the direction from which the wind…
The direction of a wind is the direction from which the wind is coming.
Wind moves from ___________ pressure areas to __________ pre…
Wind moves from ___________ pressure areas to __________ pressure areas.
Every square inch of our body, at sea level, sustains ______…
Every square inch of our body, at sea level, sustains ______________ of atmospheric pressure.
A product of incomplete combustion that is a major air pollu…
A product of incomplete combustion that is a major air pollutant is