Florida Teacher Certification Examinations (FTCE) Subject Area Practice Test

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What type of rock is formed from pre-existing rocks subjected to high heat and pressure?

Metamorphic
Sedimentary
Igneous
Granite

The correct answer is: Metamorphic

The type of rock formed from pre-existing rocks that are subjected to high heat and pressure is metamorphic rock. This process involves the alteration of the original rock's mineral composition and texture without the rock melting. The intense conditions facilitate various changes such as recrystallization, foliation, or the development of new minerals, resulting in a rock that may be significantly different from its original form. Common examples of metamorphic rocks include schist and marble. In contrast, sedimentary rocks are formed from the accumulation and compaction of sediments, while igneous rocks develop from the cooling and solidification of magma or lava. Granite, specifically, is categorized as an igneous rock, not metamorphic. Thus, the correct identification of metamorphic rock reflects an understanding of the rock cycle and the processes that lead to the formation of different rock types.