Final answer:
Sedimentary rocks are made of fragments of igneous rock or shells and are cemented together without melting. Metamorphic rocks are formed when igneous or sedimentary rocks are altered by heat and pressure. Texture and composition can help identify sedimentary and metamorphic rocks.
Step-by-step explanation:
Sedimentary rocks are made of fragments of igneous rock or the shells of living organisms deposited by wind or water and cemented together without melting. Examples of sedimentary rocks include sandstones, shales, and limestones. Metamorphic rocks are produced when high temperature or pressure alters igneous or sedimentary rock physically or chemically. Metamorphic rocks can have a foliated or non-foliated texture.
To identify which rock is sedimentary and which is metamorphic, we can use their texture and composition. Sedimentary rocks often have visible layers or bedding due to the deposition of sediments over time. They may also contain fossils. Metamorphic rocks, on the other hand, can have a banded appearance or show a preferred orientation of minerals. They may also have recrystallized minerals or show signs of physical deformation.