Beneath some valleys in East Africa and in a large area called the Basin and Range Province in the western United States and northern Mexico, the crust ____
A)appears to be in the initial stages of rifting
B)appears to have undergone numerous earthquakes in the last 1000 years
C)is much thicker than it is in the surrounding areas
D)is composed mostly of basalt
E)is composed of fragments of extinct volcanoes
A
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What is NOT TRUE regarding migration?
A) Causes of migration can be divided into push-and-pull factors. B) Spatial differences in economic opportunities often explain why young people leave rural areas. C) Most movements are involuntary. D) The slave trade is an example of involuntary migration. E) Impelled migration is when people move under duress.
The length of channels per unit area is called ____
a. stream order b. drainage density c. stream discharge d. stream gradient
To what depth would you have to dive to be in water that would not be moving due to surface waves with a length of 5 meters?
A. 10 meters B. 5 meters C. 20 meters D. 40 meters E. 2.5 meters
What is NOT one of the projections of future climate changes and impacts?
A. Hot temperature extremes will be more frequent. B. Ocean temperatures will continue to rise. C. Many species will be at greater risk of extinction. D. Sea levels will rise everywhere uniformly. E. Precipitation extremes will be more likely.