human
What is the best way to determine which type of a rock is igneous, sedimentary, or metamorphic?
assistant
The best way to determine which type of rock is igneous, sedimentary, or metamorphic is by looking at its physical characteristics. Metamorphic rocks have been changed in shape and composition through heat and pressure. Sedimentary rocks are formed from the accumulation of smaller particles over time. Igneous rocks form when molten material cools and solidifies.