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The Energy of Nature$
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E. C. Pielou

Print publication date: 2001

Print ISBN-13: 9780226668062

Published to Chicago Scholarship Online: February 2013

DOI: 10.7208/chicago/9780226668055.001.0001

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PRINTED FROM CHICAGO SCHOLARSHIP ONLINE (www.chicago.universitypressscholarship.com). (c) Copyright University of Chicago Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CHSO for personal use.date: 28 July 2021

The Earth's Internal Energy

The Earth's Internal Energy

Chapter:
(p.149) 14 The Earth's Internal Energy
Source:
The Energy of Nature
Author(s):

E. C. Pielou

Publisher:
University of Chicago Press
DOI:10.7208/chicago/9780226668055.003.0014

The earth's structure consists of several layers in the form of spherical shells surrounding a core; the layers differ from each other chemically and physically. The outermost layer, which is not uniform, is the crust: oceanic crust, under the ocean floor, is a thin layer of relatively heavy rocks — chiefly basalt — whereas continental crust, which underlies continents and continental shelves, is a thicker layer of less dense rock — chiefly granite and related rocks. The next layer is the mantle. It is a ductile solid, consisting of silicate rock. Below the mantle is the core of the earth. It has two layers, an outer liquid layer encasing an inner solid layer. Nearly all the material of the earth's interior, except (perhaps) the solid iron of the inner core, moves constantly. All this movement consumes energy, and the earth possesses energy of several kinds — thermal energy, kinetic energy, and magnetic energy. This chapter begins by considering the thermal energy — heat — the primary source of which is radioactivity. An important secondary source is the residual heat remaining from the time of the earth's creation.

Keywords:   crust, mantle, core, heat, thermal energy, radioactivity

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