Theoretical Science: these are the scientists who develop new theories and hypotheses to explain natural phenomenon. For example, in astronomy, a theoretical scientist might say “I have formulated a theory to explain how planets form. My theory predicts that the Moon is made of cheese.  A theoretical statement says something about the values of one or more variables, although it is generally thought of as expressing something about the relationship between two or more variables (e.g., “The more television a child sees, the more aggressive the child will act”). Theoretical Science: these are the scientists who develop new theories and hypotheses to explain natural phenomenon. For example, in astronomy, a theoretical scientist might say “I have formulated a theory to explain how planets form.