Exam 4: Up From the Inferno: Magma and Igneous Rocks

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

If a body of magma is subjected to fractional crystallization,the rock that results is expected to be ____________.

Coarse-grained granite is most similar in mineral composition to fine-grained ____________.

If a body of magma becomes more felsic,its viscosity will ____________.

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

Stoping by magmas occurs when ____________.

When rock is partially melted,the chemistry of the melt is ____________.

Volatiles refer to substances that ____________.

Bowen's continuous reaction series describes the crystallization behavior of a single mineral (with variable chemical composition),____________.

Which type of magma has the greatest silica content?

A volcano emits ash,which falls from the sky,settles in layers,and is eventually cemented.The resultant rock is termed ____________.

All of the Earth's internal heat was acquired very early in its history through meteoric impact and differentiation of the core.The Earth's interior loses heat to space but does not currently receive heat through any known process.

When magma crystallizes,____________ are formed.

Obsidian ____________.

A sill is ____________.