human
How can I tell if a rock is metamorphic or sedimentary?
assistant
Metamorphic rocks are formed when existing rocks are changed by heat and pressure. Sedimentary rocks are formed by the accumulation of particles in layers over time. To determine whether a rock is metamorphic or sedimentary, look for evidence of changes in texture, color, and composition that indicate either heat or pressure has been applied to the rock. If you see these signs, the rock is likely metamorphic.