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Exam 22: Minerals, Rocks, and Volcanoes

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Question 31

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Orthoclase and plagioclase are the two main types of

A) silica.
B) feldspars.
C) calcite.
D) sulfides.

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Question 32

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Molten rock material on Earth's surface is called

A) magma.
B) lava.
C) pluton.
D) silica.

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Question 33

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The element that is most abundant in Earth's crust is

Which of the following is not one of the major types of metamorphism?

The Mohs scale is based on how many minerals?

The study of rocks is called

The largest plutons are called

Gas, lava, and ______________ are the three general products emitted during a volcanic eruption.

Rocks formed from consolidated sediment deposited in layers are known as ______________ rocks.

The physical characteristic that is used to distinguish intrusive igneous rocks from extrusive igneous rocks is _____________.

Sediments are classified according to the source of their constituents into two main groups. One is chemical. What is the other?

The term cleavage refers to the tendency of some minerals to

Which of the following scientists is generally designated "the father of geology"?

The two elements silicon and oxygen, taken together, make up about what percent of Earth's crust by mass?

A(n) ______________ is the surface expression of magma that originates in the asthenosphere and deeper.

Intrusive igneous rock formations that cut more or less vertically across older formations are said to be ______________.

The process of transforming sediment into sedimentary rock is called

Laccoliths and sills are examples of ______________ plutons.

The hardest mineral on the Mohs hardness scale is named ______________.

The brilliancy of a gem is a function of its index of ______________.