BIOL. AND CHEM. are two distinct scientific disciplines that are often studied together. BIOL. stands for Biology, which is the study of living organisms and their interactions with the environment. CHEM. stands for Chemistry, which is the study of matter and its properties. SCIS stands for Science, which is an umbrella term for both Biology and Chemistry. SCS stands for Science and Society, which is a field of study that examines the impact of science on society.