what is ethics

Ethics is the analysis of good, evil, right, wrong, and the practices thereof.

http://en.wikipedia.org/wiki/Ethics

There are many different types of ethics as well...medical ethics for example and medical ethics might be about euthanasia, abortion, DNR's...etc

Beg to differ! Ethics is the analysis of right and wrong. However, that can be applied to any area of life: business, law, medicine, teaching, just every day living. In addition, ethics is not stationary. Various societies have differing ethical standards of measurement. As a result ethics is a very difficult area to evaluate, study and most of all live.