Florida Teacher Certification Examinations (FTCE) Subject Area Practice Test

Marble, serpentine, and schist are examples of which type of rock?

1. Metamorphic

2. Sedimentary

3. Igneous

4. Volcanic

The correct answer is: Metamorphic

Marble, serpentine, and schist are all classified as metamorphic rocks. Metamorphic rocks are formed from the transformation of existing rock types—either igneous, sedimentary, or even other metamorphic rocks—through the processes of heat, pressure, and chemically active fluids. Marble originates from limestone or dolostone and is characterized by its crystalline structure and ability to take a high polish. Serpentine is typically formed from the alteration of ultramafic rocks, like peridotite, and has distinct greenish hues due to its mineral composition. Schist is notable for its foliated texture, resulting from the alignment of its mineral grains under directed pressure, which often happens during regional metamorphism. In contrast, sedimentary rocks form through the accumulation and compaction of mineral and organic particles, igneous rocks are formed from the solidification of molten material (magma or lava), and volcanic is a term that usually refers to a specific type of igneous rock that originates from volcanic activity. Thus, these three rocks clearly exemplify the characteristics and formation processes of metamorphic rocks.