4.4 KCB Metamorphic Rocks

Discover metamorphic rocks! This worksheet covers formation, types, and more for 6-8 graders.

Metamorphic rocks are formed from? igneous rocks sedimentary rocks other metamorphic rocks All of the above Geologists classify metamorphic rocks according to the size of the grains making up the rock color of the grains making up the rock arrangement of the grains making up the rock variety of the grains making up the rock How are rocks changed into metamorphic rocks? weight and pressure size and pressure heat and pressure weight and size Minerals in a rock can change to new minerals under metamorphic processes. true false Fill in the blanks with the correct term Foliated rocks are metamorphic rocks whose mineral grains are lined up in parallel layers.Nonfoliated rocks are metamorphic rocks whose minerals grow and rearrange themselves in a non-layered texture.Plastic deformation is the bending or folding of rock.The process through which magma touches existing rock to create a metamorphic rock is called contact metamorphism.The process that could create an entire mountain range of metamorphic rock is called regional metamorphism. Match the igneous or sedimentary rock to the metamorphic rock it becomes. granite gneiss limestone marble sandstone quartizite shale slate Sort Determine whether each statement is TRUE or FALSE. TRUE Rock can bend without melting. Pressure increases with depth in Earth's crust and mantle. Temperatures must reach at least 150˚ C to create a metamorphic rock. High temperatures and pressure affect the formation of metamorphic rock. Metamorphic rocks can be classified into two groups, based on texture: foliated and nonfoliated. The composition of a parent rock determines the temperature required to metamorphose rock. Indications that a rock has experienced metamorphism include changes in composition and structure. FALSE The term plastic formation describes a temporary change in the shape of rock. Texture does not change when rock becomes metamorphic rock. Most metamorphic rock forms on the surface of Earth. Metamorphic rock crystallizes from magma. During regional metamorphism the heat and gases of magma change existing rocks into new metamorphic rocks.