The earth's magnetic field probably originates in
A) electric currents in the core.
B) magnetized iron in the core.
C) magnetized iron minerals in the mantle.
D) magnetized iron minerals in the crust.
Correct Answer:
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Q23: Each step of 1 on the Richter
Q24: An earthquake occurs far from an observing
Q25: The reasons why the earth's core is
Q26: The earth's crust
A) has an approximately constant
Q27: A moraine is a pile of rock
Q29: Earthquakes are least likely to occur
A) in
Q30: Earthquake P waves
A) are longitudinal vibrations like
Q31: Temperatures inside the earth
A) are constant below
Q32: Which one or more of the following
Q33: Most earthquakes are caused by
A) volcanic eruptions.
B)
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