1) Igneous rocks and metamorphic rocks derived from igneous "parents" make up what percentage of the Earth's crust?
2) What three components make up most magmas?
D) Liquid Portion, Solid Portion, Gaseous Portion
C) Gases dissolved in a magma
5) Select the choice below that best describes the role of volatiles in an ascending magma.
D) Volatiles will expand with decreasing pressure, carrying the melt upward
6) What was the rate of cooling and the environment of formation for an extrusive igneous rock?
B) Fast because it was erupted from a volcano
Sign up for free and study better.
Get started today!