Describe the role of gravity in evolution of stars and other objects in the universe.

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
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Describe the role of gravity in evolution of stars and other objects in the universe.
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The earth is the third planet from the sun and is the only planet in our solar system that can sustain life. The earth's surface is covered by water about 70 percent and by land about 30 percent. The earth has a density of about 5.5 gm/cm3. The earth is divided into three main layers; the crust, mantle, and core. The crust is the uppermost layer, the mantle is the middle molten layer and the innermost layer is the core which is made up of mainly nickel and iron.

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