Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 10, Problem 24Q
To determine
The definition of regolith and the reason behind its powdery character.
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What is a boundary layer? What causes a boundary layer to develop?
Earth's mass ia 6x10^24 kg and its radius is 6.4x10^6 m.
What is the average mass density of Earth?
The density of the rocks compromising Earth's outermost layer (its "crust") ranges from 2000 to 3500 kg/m ^3.
Based on your answer, what can you conclude about the material deep inside Earth's interior?
Hydrothermal vent areas have hydrothermal chimneys, from which hot, mineral-rich water comes out.
(This hot water often looks like black smoke, but it's not really smoke, it just has a lot of dark, microscopic mineral grains in it.)
Where does this hot water come from?
a Ice underneat the seafloor gets melted by volcanic activity, and this extra water comes out of the vents.
b It comes directly from the Earth's core, since our core is made of hot, high-pressure water.
c It is seawater that went down through cracks, got heated by magma, and rises up to emerge from the seafloor.
d Some of the minerals in the Earth's mantle break down and release large volumes of water.
Chapter 10 Solutions
Universe
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