Chemistry is the study of matter, as well as the changes that take place in matter. There are five basic areas of chemistry. These are Organic, Inorganic, Analytical, Physical, and Biochemistry.
Organic chemistry is the study of Carbon based compounds. Other elements that are commonly seen in organic chemistry are hydrogen, nitrogen, and oxygen. Others are seen to a lesser degree. Organic molecules are the molecules of life.
Inorganic chemistry is the study of inorganic molecules. This does not mean that they lack carbon. It means that they are not carbon based molecules. Inorganic chemistry deals primarily with the elements in the center of the periodic table, the metals. There are several inorganic compounds that can be found in biological systems, therefore inorganic does not mean they are not found in living organisms.
Analytical chemistry is the field of identifying and distinguishing between different molecules in a mixture, as well as quantifying the amounts. This involves testing using laboratory equipment and interpretation of laboratory results.
Physical chemistry is the study of the physics behind chemistry. It involves studying the laws of physics as they apply to subatomic particles, atoms, and molecules in a chemical setting. This includes the effect of light, heat, and kinetic energy on chemical systems.
Biochemistry is the study of the chemistry in a biological setting. The primary goal of biochemistry is to understand the chemical reactions that take place in biological macromolecules. These include carbohydrates, proteins and nucleic acids.