Bias
A prejudice for or against something, often in a way that is considered unfair. A historical source can be biased if it only presents one side of an argument or event.
Cause and Consequence
Cause is the reason or event that leads to another event. Consequence is the result or effect of an event. This is a fundamental concept in history.
Chronology
The order of events as they happened in time. Historians use chronology to understand cause and effect.
