The longest days of the year in the Northern Hemisphere are experienced at the
A) time that the Sun is directly overhead at the Tropic of Cancer.
B) vernal equinox.
C) autumnal equinox.
D) time of 24-hour days at the South Pole.
E) winter solstice.
Question 2
Which of the following describes the pressure gradient force?
A) It drives air from areas of higher to lower barometric pressure.
B) It is the only force acting on atmospheric flows in the upper troposphere.
C) It causes apparent deflection of winds from a straight path.
D) It decreases with height above the surface.
Geese are the dominant herbivores in many northern wetlands, such as this marsh at La Perous
The Northern Lights (Aurora Borealis)
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Time-of-entry mapping