Paleomagnetism was the confirmation needed to show historical plate movements. Indicate whether the statement is true or false
ANS: T
The magnetite in magma cools in the direction of the magnetic field. This information gave evidence
as to the orientation of continents in the past. Information can be found in the section The
Confirmation of Plate Tectonics.
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The great scramble for African colonies occurred
A) just after the Napoleonic wars. B) during Portugal's domination of the world-system. C) as Spain was colonizing the America's. D) in the three decades preceding World War I. E) in the two decades after World War II.
What is the MOST important shortcoming of trade theories?
A) They generally ignore scale economies and transportation costs. B) They assume homogeneous products and perfect competition. C) They fail to incorporate the role of firms, especially multi-national corporations. D) They ignore governmental intervention. E) all of the above
Assume the time on your watch, showing local standard time, is 4:15 p.m. A chronometer reads 2:15 a.m. What is your longitude?
What will be an ideal response?
Which of the following is a possible consequence of a greenhouse warming?
A) sea-level rise B) a decrease in global mean precipitation C) increase in sea ice D) lower frequency of hurricanes