| A | B |
|---|
| metamorphic rock | when sedimentary or igneous rocks are changed by heat, pressure or chemical reaction |
| foliated | Crystals have layers (bands) |
| unfoliated | Crystals are not arranged in layers and don't break in layers |
| regional (dynamic) metamorphism | when rocks deep in the earth are changed by increases in temperature and pressure |
| contact (thermal) metamorphism | when rocks are heated by contact with magma or lava |
| chemical reaction | change in a thing that produces a new substance with new and different properties |
| contact | touch |
| property | special thing, like color, shape, texture ... |
