First-hand account
Refers to a direct observation or experience of an event, often provided by primary sources
Second-hand account
Refers to information that is reported by someone who did not witness the event, often provided bu secondary sources
Bias
Refers to the tendency of sources to reflect an unbalanced or unfair opinion
Prehistory
The period of time before written records
Archaeologists
Scientists who study the remains left behind by humans
Paleontologists
Scientists who study the remains of all life forms (including dinosaurs)
Facts
Refers to information that is not under dispute, they may include information such as what happened, who was involved and when an event occurred
Interpretations
This explains how or why something happened
Chronology
The arrangement of events or dates in the order of their occurrence