The mantle can be separated into two different portions: the lower mantle and the upper mantle.The lower mantle is
A)completely solid due to extreme pressure that prevents iron-rich silica rocks from melting.
B)composed of silly putty that flows like molasses.
C)rigid and has no capability of flow.
D)predominantly liquid silica.

Question

Quizplus · Accepted Answer

The lower mantle is composed of solid iron-rich silica rocks that are under extreme pressure, which prevents them from melting. Therefore, option A is the best choice. Option B is incorrect because silly putty is not a component of the mantle, and option C is incorrect because the lower mantle does have the capability of flow. Option D is also incorrect because the lower mantle is predominantly solid, not liquid.

The Mantle Can Be Separated into Two Different Portions: the Lower