This document introduces some key concepts in ethics, including: 1) Ethics and morality refer to determining right and wrong actions, with ethics focused more on character and morality on actions. 2) For an action to be moral, it generally involves an agent, intention, and impact on others. Only humans can be moral agents by reflecting on their actions. 3) There are debates around whether morality is universal or relative to cultures. Relativism holds morality depends on cultures, while absolutism believes some principles are always right or wrong.