In science, a theory is a logical explanation that is based on lots of bits of evidence gathered over time. A good scientific theory is able to explain some aspect of the universe. If atoms are the fundamental building blocks of matter, then:
- What would it mean to have a "theory of atoms?"
- What would you have to do to develop a theory of atoms?
- What kind of evidence would convince you that all matter is really made up of collections of tiny particles?