Unit 27 Review Questions

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. Which of the following is NOT a characteristic of a mineral?

Has specific physical properties correct incorrect

Has inorganic and/or organic elements correct incorrect

Has a specific chemical composition correct incorrect

Has a crystalline structure correct incorrect

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. What are the two most common elements in the Earth's crust?

silicon and aluminum correct incorrect

nitrogen and oxygen correct incorrect

calcium and iron correct incorrect

silicon and oxygen correct incorrect

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. Basalt is a:

mafic extrusive igneous rock correct incorrect

mafic intrusive igneous rock correct incorrect

felsic extrusive igneous rock correct incorrect

felsic intrusive igneous rock correct incorrect

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. How does a dike differ from a sill?

Dikes are composed of metamorphic rock, whereas sills are composed of igneous rock. correct incorrect

Dikes cut across rocks vertically, whereas sills intrude horizontally between rock layers. correct incorrect

Dikes are typically mafic in composition, whereas sills are typically felsic in composition. correct incorrect

Dikes are typically associated with laccoliths, whereas sills are typically associated with volcanic pipes. correct incorrect

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. Exfoliation occurs with:

dikes correct incorrect

sills correct incorrect

granite domes correct incorrect

volcanic pipes correct incorrect