Physical characteristics of the Colorado river basin

What is the approximate length of the Colorado River?

• 1000 miles

• 1450 miles

• 2000 miles

• 2500 miles

The Colorado River drainage basin covers ______ km2 of North America.

• 637,000

• 500,000

• 700,000

• 800,000

How many large tributaries join the Colorado River?

• 5

• 7

• 9

• 11

Which side of the Colorado River basin is the Mojave Desert located?

• Eastern

• Western

• Northern

• Southern

What type of rock mainly composes the Colorado River basin?

• Igneous

• Sedimentary

• Metamorphic

• Volcanic

The phenomenon is called when high temperatures lead to expansion and contraction of the rock, opening up rock fissures.

• Thermal expansion

• Frost wedging

• Chemical weathering

• Biological weathering

The river flows in a largely desert region, receiving less than ______ mm rainfall per annum.

• 250

• 500

• 1000

• 750

The main reason for the high evaporation rates in the lower basin of the Colorado River is:

• High temperatures

• Low humidity

• Strong winds

• All of the above