Earth: An Introduction to Physical Geology (12th Edition)

Published by Pearson
ISBN 10: 0134074254
ISBN 13: 978-0-13407-425-2

Chapter 1 - Section 1.6 - Earth’s Internal Structure - Concept Checks - Page 24: 3


The inner core is solid due to the pressures that exist in the center of the planet.

Work Step by Step

The inner core is a sphere that has a radius of 1221 kilograms, about 757 miles. Unlike the outer core, which is a liquid layer that generates the Earth's magnetic field, the inner core is solid and higher in temperature. The pressure that is put on the inner core makes it solid.
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