A principal factor in the population shift westward in the 1850s was
A) a gold rush.
B) a war with Mexico.
C) a "nitrate rush."
D) agricultural expansion in the Great Plains.
E) the Erie Canal.
Answer: A
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All of the following nations have suffered international forced migration in the 20th century except
A) Palestinians. B) Jews. C) Kurds. D) Armenians. E) Palestinians, Jews, Kurds, and Armenians.
The origin and early diffusion of language families predate recorded history
Indicate whether the statement is true or false.
Most magma is generated in Earth's upper mantle by ________ of solid rock
A) decompression melting B) partial melting C) diffusion D) crystallizing
If, in a partially mixed estuary, the seaward flow is 15 units per day and the river input is 11 units per day the net saltwater flow is ________ units per day.
A. 4 B. 8 C. 15 D. 26 E. 11