Answer the following question given this paragraph: 

Metamorphism. This long word means “to change form. “ A rock undergoes metamorphism if it is exposed to extreme heat and pressure within the crust. With metamorphism , the rock does not melt all the way. The rock changes due to heat and pressure. A metamorphic rock may have a new mineral composition and/or texture.


Q: What scientific word, which gives its name to a type of rock, means "to change form"?


A:
metamorphism