The study of paleomagnetism is possible because ____.
a. the magnetic minerals in rocks create the Earth's magnetic field
b. most rocks contain no magnetic minerals
c. the magnetic minerals in rocks disrupt the Earth's magnetic field
d. the magnetic minerals in a cooling lava point toward the north magnetic pole
e. none of these
d. the magnetic minerals in a cooling lava point toward the north magnetic pole
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True or False: Geologists infer the interior composition at deep levels from calculations of Earth's density
Indicate whether this statement is true or false.
The pterosaur adapted to flight with ____
A)a membrane-covered hand-like structure with an elongated fourth finger B)bird-like wings covered with hollow feathers C)bird-like wings with no covering D)bat-like wings covered with thick fur E)bat-like wings with no covering
How many alpha particles are emitted in the series of radioactive decay events from a U-238 nucleus to a Pb-206 nucleus?
A. 8 B. 16 C. 32 D. 4
Identify four enduring North American cultural regions, and describe their key characteristics
What will be an ideal response?