1. A desert can be caused by what factors?
A. Lack of rain for an extended period of time
B. Mountains blocking moisture over the area
C. change in the flow of rivers or streams
D. all of the above
2. A sudden very heavy rain is called a __________________.
A. downpour
B. cloudburst
C. storm
D. gully washer
3. The average yearly rainfall that occurs in the desert southwest is __________.
A. less that 4 inches
B. less than 10 inches
C. less than 14 inches
D. less than 12 inches
4. During the day the climate in the desert southwest can be very hot but at night the climate becomes ______________.
A. cold
B. humid
C. tropical
D. wet