You Observe a Dark Colored Igneous Rock with Very Fine

question 33

Multiple Choice

You observe a dark colored igneous rock with very fine crystals that are only visible under magnification. What can be said about this rock?

• A) It cooled slowly in a magma chamber.
• B) It cooled quickly in a magma chamber.
• C) It cooled slowly on Earth's surface.
• D) It cooled quickly on Earth's surface.
• E) It was ejected as a fine ash and later cemented together.

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Definitions:

Weighted Average

A calculation that takes into account the varying degrees of importance of the numbers in a data set, used in inventory valuation and other financial measurements.