Why are all air masses labeled either polar, arctic or tropical?
A) because heat exchanges occur only in the low and high latitudes
B) because energy exchanges occur only in the high latitudes
C) because heat and energy exchanges occur only in the low and high latitudes
D) because air masses don't form in the middle latitudes
Question 2
The sources of air masses occur only in low and high latitudes because
A) middle-latitude weather is too variable.
B) middle-latitude weather is not variable enough.
C) there are no oceans in the middle latitudes.
D) there is insufficient contrast in surface type (land vs. ocean) in the middle latitudes.
Skull Inferior View Labeled
Four cutaneous receptors that occur in human skin.
Arctic Ocean was isolated
Arctic warming: Drunken trees
Arctic Tundra, Summer