chemistry is usually classified as what type of science
Chemistry Chemistry occupies an intermediate position in a hierarchy of the sciences by reductive level between physics and biology.[3] It is sometimes called the central science because it provides a foundation for understanding both basic and applied scientific disciplines at a fundamental level.[4] Examples include plant chemistry (botany), the formation of igneous rocks (geology), how atmospheric ozone is formed and how environmental pollutants are degraded (ecology), the properties of the soil on the moon (astrophysics), how medications work (pharmacology), and how to collect DNA evidence at a crime scene (forensics).
Scientific theory A scientific theory is an explanation of some aspect of the natural world that can be repeatedly tested, in accordance with the scientific method, by using a predefined protocol of observations and experiments.[1][2] Established scientific theories have withstood rigorous scrutiny and are a comprehensive form of scientific knowledge.[3]