Laws Vs. Theories

Laws

A law in science is something that has been proven and comes from observations. 

An example of a proven Scientific Law:

• Issac Newton's Three Laws of Motion
  

1. The first law states that in order for the motion of an object to change, a force must act upon it. (inertia)
2. The second law describes the relationship between mass and acceleration.
3. The third law states that anytime a force acts from one object to another, the original object will receive a equal but opposite reaction.

Theories

A theory is something that is being examined through testing such as the scientific method and it develops from ones inferences.

An example of a theory is Charles Darwin's Theory of Evolution:
Charles developed a theory that all species of life evolved from a common ancestor. Humans are believed to share a common ancestor with apes and chimpanzees.