World History Lesson 1-1

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In the Gregorian calendar, events are dated either before or after the birth of_________

A group of ten years is known as

Some early calendars developed by the Chinese, Egyptians, and Hebrews were based on the cycles of the______

The remains of plant and animal life from an earlier time are called_______

The study of human culture and how it develops over time is called

The first historical era, more than 5,500 years ago, is called____________and refers to a time before people developed writing.

The most important fact that helped scientists connect the discovery of the skeleton, Lucy, in Africa to modern humans was that it

A group of 100 years is know as