What are the evidences used by Harry Hess to support the hypothesis of sea-floor spreading?
a. New rock near the ridge
b. Oldest rock near the ridge
c. Oldest rock farther away
d. Both a and c
Ans: d. Both a and c
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What are the four major issues currently at the center of the immigration debate in the United States?
What will be an ideal response?
Which of the following was mentioned in the opening two-page spread of Chapter 1 (The Nature of Physical Geography)?
A) Volcanoes B) Earthquakes C) Climate D) Water E) All of these choices are correct
Which of the following is the least abundant natural greenhouse gas?
A) oxygen B) carbon dioxide C) nitrogen D) methane E) water vapor
By 2020 what will the regulatory standard for gasoline mileage of automobiles in the United States be?
A) 27.5 miles per gallon B) 30.5 miles per gallon C) 35 miles per gallon D) 33 miles per gallon E) 22 miles per gallon