Unequal heating of earth 's surface by the sun causes global wind patterns.
Winds of 74 mph are the standard for a hurricane.
Hurricanes form due to unequal heating of earth's surface by the sun.
What forms due to unequal heating of Earth's surface by the Sun?

A) rays or beams
B) hurricanes
C) power stations
D) It expands
E) climate
F) The atmosphere
G) an object
H) energy barrier