5005 Praxis Practice Test Practice Question
Which of the following types ofrock is formed by the compaction and cementation of small fragments of preexisting rocks?
Correct Answer: B
Rationale: Sedimentary rock is formed through the compaction and cementation of small fragments of preexisting rocks, known as sediments. This process occurs over time as layers accumulate, leading to the formation of various sedimentary rock types.
Volcanic rock (A) originates from lava or magma, solidifying quickly on the Earth's surface. Metamorphic rock (C) arises from the alteration of existing rocks under heat and pressure, not from fragment compaction. Intrusive rock (D) forms from magma that cools slowly beneath the Earth's surface, lacking the sedimentary processes involved in the formation of sedimentary rock.
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