Science, Tech, Math › Science An Introduction to Science Share Flipboard Email Print Hero Images / Getty Images Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated February 25, 2019 Science is such a broad topic that it is broken down into disciplines or branches based on the particular area of study. Learn about the different branches of science from these introductions. Then, get more detailed information about each science. Introduction to Biology Keith Weller, USDA Agricultural Research Service Biology is the science that deals with the study of life and how living organisms work. Biologists study all forms of life, from the smallest bacterium to the mighty blue whale. Biology looks at the characteristics of life and how life changes over time. Introduction to Chemistry Nicholas Rigg, Getty Images Chemistry is the study of matter and the different ways matter and energy interacts with each other. The study of chemistry involves learning about the elements, molecules, and chemical reactions. Introduction to Physics Andy Sotiriou, Getty Images The definitions for physics and chemistry are pretty much the same. Physics is the study of matter and energy and the relationships between them. Physics and chemistry are called the 'physical sciences'. Sometimes physics is considered to be the science of how things work. Introduction to Geology Caiaimage/Rana Dias / Getty Images Geology is the study of the Earth. Geologists study what the earth is made of and how it was formed. Some people consider geology to be the study of rocks and minerals... and it is, but there is much more to it than that. Introduction to Astronomy Stocktrek / Getty Images While geology is the study of everything having to do with the Earth, astronomy is the study of everything else! Astronomers study planets other than earth, stars, galaxies, black holes... the whole universe.