The kind of science that studies all forms of matter is chemistry.

Here's why:

* Matter: Chemistry is the study of matter and its properties as well as how matter changes.

* All Forms: Chemistry encompasses the study of everything from the smallest atoms and molecules to the complex structures of living organisms. It explores the composition, structure, properties, and reactions of matter.

While other sciences like physics and biology also deal with matter, chemistry is the central discipline focused on its fundamental nature.