Author Question: ________ is molten rock that is below the Earth's surface and retains most of its volcanic gases. ... (Read 67 times)

strangeaffliction · **on:** Jul 16, 2018

________ is molten rock that is below the Earth's surface and retains most of its volcanic gases.

A) Lava
B) Pumice
C) Magma
D) Volatiles

Question 2

Describe how magnesium can be exchanged for iron in olivine without destroying the internal framework of the mineral.

What will be an ideal response?

sylvia · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

Answer: C

Answer to Question 2

Answer: Magnesium and ferrous iron both have charges of 2+, so they can be switched in the mineral structure without too much trouble because the ions are roughly the same size.