Core Concepts 9

Chinese history is organized by...

What is the time before humans invented writing called?

What is the study of humankind in all aspects?

Who explores places where people once lived and worked?

This event is the dividing point between B.C. and A.D.

A decade is how many years?

How many calendars did the Aztecs use?

What is information that comes directly from a person who experienced an event called?

This tool helped Muslim astronomers calculate positions of the sun, moon, planets, and stars.

A book written about the Vietnam War is a...

Events organized in the order in which they happened are placed in what order?

Letters written by soldiers are...

What is an unfair preference or dislike of something called?

These people explore where individuals once lived and worked.

A song about a hunt may form an important part of a society's . . .

A direct quote from Martin Luther King Jr. is a...

A millennium is how many years?

A length of time singled out because of a specific event that happened during that time is a...

What is a line with a series of events and dates called?

A century is how many years?