Exam 6: Up From the Inferno: Magma and Igneous Rocks

As compared to coarse-grained igneous rocks,fine-grained igneous rocks ________.

Plutons and batholiths are ________.

Due to fractional crystallization and assimilation of surrounding host rock,most magmas that rise slowly through the crust chemically evolve to become ________.

In regard to the cooling of molten rock,a ________ volume and a ________ shape cool faster.

All other factors equal,if a body of magma becomes more felsic,its viscosity will ________.

In the figure provided below,what type of igneous intrusion is the horizontal rock unit shown by letter A?

Decay of radioactive isotopes,differentiation of Earth's iron core,gravity-driven compression,and meteoric bombardment all caused early Earth to ________.

The formation of magma within Earth is NOT caused by which of the following processes?

Bombs,ash,and cinders are all examples of ________.

At which of the following does an island volcanic arc occur in the present day?

A volcanic neck,such as that seen at Shiprock,New Mexico (below),is a(n)________.

Magma tends to ________.

Most commonly,felsic igneous rocks ________.

At which of the following does a famous example of hot-spot volcanism occur?

Important volatiles in magmas include ________.

The figure below shows mafic magma as it meets the seafloor,which cools to form an igneous rock called ________.

Injecting hot fudge into ice cream and causing the ice cream to melt is an appropriate analogy for which cause of magma melt?

At which of the following does a continental volcanic arc occur in the present day?

Igneous rocks ________.

Volcanoes that do NOT occur along either present or emergent plate boundaries are associated with ________.