When heat and pressure are applied to sedimentary rock, it changes into metamorphic rock.

Here's why:

* Heat: Heat causes the minerals within the sedimentary rock to recrystallize and change their structure.

* Pressure: Pressure squeezes the rock, forcing the minerals to align in a more organized pattern.

This process of transformation is called metamorphism. Some examples of metamorphic rocks include:

* Marble: Formed from limestone

* Slate: Formed from shale

* Gneiss: Formed from granite or other igneous rocks