What specifically describes the balance between the lithosphere floating atop the asthenosphere?

a. Buoyancy
b. Isostatic equilibrium
c. Density stratification
d. Compensation


ANS: B
The height of the continental crust is dependent upon the depth and the size of the portion that is in the
asthenosphere. Erosion can have an effect on the isostatic equilibrium because it is connected to mass
and density. Information can be found in the section Earth's Inner Structure Was Gradually Revealed.

Environmental & Atmospheric Sciences

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Fill in the blank(s) with the appropriate word(s).

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Indicate whether the statement is true or false

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An atom has 2 electrons, 3 protons, and 3 neutrons. What is the atom's mass number?

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