ROQ 2

Question 1

Mafic minerals are rich in ______

Answer 1

magnesium and iron (oxides)

Question 2

Flux melting is induced by the addition of ______ to a melt

Answer 2

volatiles

Question 3

The process of fractional crystallization results in the magma becoming ________________________________

Answer 3

more felsic because mafic minerals are solidifying and settling out of the melt

Question 4

____________ are irregular or blob-shaped intrusions

Answer 4

Plutons

Question 5

An igneous melt which cools on the surface is known as _____ , while and igneous melt which cools underground is known as ________

Answer 5

lava, magma

Question 6

Effusive eruptions are ___________

Answer 6

characterized by low viscosity lava that flows easily.

Question 7

T/F: Coarse grained igneous rocks likely cooled rapidly, while the fine grained igneous rocks cooled at a much slower rate.

Answer 7

False

Question 8

What is a xenolith?

Answer 8

a chunk of wall rock that was trapped during the solidification of magma

Question 9

Intrusive igneous rocks cool _______ and are _______ grained

Answer 9

slowly, coarse