Examine Figure 3.11.  Assume that the flow shown is measured at a place on the Colorado River before it reaches southern Arizona (where most of the water withdrawals take place).  What caused the low flows from 1965-1980?

A. lack of rain and snow upstream
B. completion of Glen Canyon dam
C. high demand downstream
D. lack of rain and snow downstream


Answer: A

Environmental & Atmospheric Sciences

You might also like to view...

Rehabilitation of wild endangered species is best done in zoos, aquariums and botanical gardens.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

Of the main nutrients in the biosphere, the one that is fixed inside nodules in certain plant roots is ________

A) carbon B) nitrogen C) oxygen D) hydrogen E) calcium

Environmental & Atmospheric Sciences

Communities of similar organisms found in a particular climate are called ________

A) ecosystems B) pools C) habitats D) ecological communities E) biomes

Environmental & Atmospheric Sciences

How can one divide the period of the last ice-age?

A. long warm episodes; short cold periods B. short warm episodes; long cold periods

Environmental & Atmospheric Sciences