In science a theory is something that ties together facts. For example, an apple falling to the ground when you let go of it is a fact. From this we can draw the conclusion that there is some force pulling it down. This theory is called the theory of gravity. | In science a theory is something that ties together facts. For example, an apple falling to the ground when you let go of it is a fact. From this we can draw the conclusion that there is some force pulling it down. This theory is called the theory of gravity. |