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The time before people invented writing.
Prehistory
A community of people who share a common culture.
Society
The process of changing plants or animals to make them more useful to humans.
Domestication
A system of exchanging goods and services for other goods and services.
Barter System
What was the name of the famous early human discovered by Donald Johanson?
Lucy
An early human or human ancestor.
Hominid
People who hunt animals and gather wild plants for food.
Hunter-gatherers
The Middle Stone Age, when people developed smaller, more complex tools.
Mesolithic Era
A system in which people focus on particular jobs.
Labor Specialization
An object made or used by people in the past.
Artifact
To move from one place to another.
Migrate
The New Stone Age, when people developed farming and polished stone tools.
Neolithic Era
An extra amount of something, such as food.
Surplus
A person who studies the past by examining artifacts and remains.
Archaeologist
Long periods of freezing weather when large sheets of ice covered land.
Ice ages
Farming; growing crops and raising animals.
Agriculture
An economy based on customs and beliefs passed down through generations.
Traditional Economy
A strip of land connecting two continents.
Land Bridge
The Old Stone Age, when people used stone tools.
Paleolithic Era
Huge stones used as monuments or places for religious gatherings.
Megaliths
The shift from gathering food to producing food through farming.
Neolithic Revolution