Answers DCSS Earth Systems CR 24-25 Unit Test — Unit testQuestion 13

13

QuizMultiple Choice

Unit Test — Unit test

Question 13 • DCSS Earth Systems CR 24-25

Which statement best describes the formation of metamorphic rocks?

Answer

A

Magma cools and crystallizes slowly beneath Earth’s surface.

B

Liquid lava erupts from a volcano and cools quickly at Earth’s surface.

C

Sand and gravel are deposited at the mouth of a river and, over time, form layers that solidify into rock.

D

Ancient sandstone beaches become buried deep beneath Earth’s surface, where they are exposed to extreme heat and pressure.

Explanation

Metamorphic rocks form when existing rocks are changed by intense heat and pressure, without melting completely. In choice D, buried sandstone experiences extreme heat and pressure, so it can transform into metamorphic rock. Choices A and B describe igneous rock formation, while C describes sedimentary rock formation.

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