Environmental Science
The unit of pressure most commonly found on a surface weather map is:

Inches of mercury (Hg)
Pounds per square inch
Millibars or hectopascals
Millimeters of mercury (Hg)

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Environmental Science
During the winter solstice in the Northern Hemisphere:

All of these
The noon sun is overhead at 23.5o S latitude
Astronomical winter begins in the Northern Hemisphere
At middle latitudes in the Northern Hemisphere, this marks the longest night of the year

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