-land bridge from asia to north america

-nomads become farmers

Olmecs

-practiced slash & burn farming

-giants stone heads

Mayas

-highly advanced civilzation

-most accurate calendar

Aztec

-warlike empire buliders

-practiced human sacrifice

Inca

-civil engineers on a massive scale

-roads

-bridges

-no written language

North america

-fishermen

-ready availability of food

Plateau

-lived beside rivers

Great basin

-gatherers,not farmers

California

-primarily gatherers&fishermen

Southwest

-farmers or nomadic hunters

Great plans

-nomadic buffalo hunters

Northeast

-coastal river

Southeast

-river valley dwellers