Denition of a derecho
A derecho is a widespread, long-lived wind storm. Derechos are associated with bands of
rapidly moving showers or thunderstorms variously known as bow echoes, squall lines, or
quasi-linear convective systems.
Chapter3 EarthSun Relationships 23
3.1 Using the following diagram of the earth, answer the questions below in the spaces provided. Remember
that the lines on the diagram may be circles on a true sphere.
What is the name ofline
(Changing the weather)
Cloud seeding is one of the premier developments in this century to physically
combat Mother Nature.
As with many technological advances, weather modication (cloud seeding)
Easterlles com Cell 3 North
(from the east) fa'lls Moist air rises raln
Westerlles PD'a' cap
(from the west)
w , Cool. my
onheast I - air falls
Cell 2 North
Cell 1 Norm