Ethics
Morality is what someone thinks or feels is good or bad.  There are many different moralities, but they share some things.  For example, most people think that murder (killing somebody) is wrong. (compare Exodus 20:13)  Some philosophers hope to find more things that moralities share.  They think that ethics should use the scientific method to study things that people think are good or bad.  Their work can be used to test the fairness of a situation, such as how people should treat each other.  An example of this kind of thinking is the categorical imperative.  Many countries have laws based on this idea of fairness.