Delta - A delta is a very fertile, flat land made of silt left behind as a river drains into a larger body of water.
Hieroglyphics - Enigmatic or incomprehensible symbols or writing.
Papyrus - A reed plant that grows along the Nile River.
Slavery - The practice of one person owning another person.
Expedition - A journey or voyage undertaken by a group of people
Social Pyramid - A social pyramid is a community based hierarchy.
Pharaoh - The title used by the rulers of Ancient Egypt .
Unification - Is the joining of separate parts into one.
Economy - Careful management of available resources.