PT 14 S3 Q1

   It is a fundamental tenet of geophysics that theEarth's magnetic ... ...

Which one of the following statements regarding the Earth's outer core is best supported by information presented in the passage?
(A) Heat circulation in the outer core controls the growth and diminution of the polar ice caps.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: Science & Technology Mix 1