The uneven distribution of insolation by latitude is primarily a result of
A) variability in the Sun's output.
B) migration of the subsolar point throughout the year.
C) the changing distance of Earth from the Sun.
D) variation in the value of a watt.
E) Earth's curvature, which presents varied angles to parallel solar rays.
Question 2
Thunderstorm tops most likely occur:
A) in the mesosphere. B) in the middle stratosphere.
C) in the lower troposphere. D) near the tropopause.