Aquifer
Underground water resource
Natural resources
Naturally occurring materials like coal
Vegetation
All the plants or plant life
Crop rotation
System of growing different crops on the same land over a period of years to improve the soil
Prehistory
Period of time before written records
Allies
Groups who agree to support each other
Agriculture
growing of crops and raising animals
Escarpment
A steep cliff as a result of erosion
Colombian exchange
Term describing the transfer of plants, animals and diseases between America and other continents since the time of Columbus
Region
Areas that have similar geographic features
Hunter and gatherers
People who hunt animals and gather wild plants for food
Reservoir
Artificial lakes that store water and are used as a source for drinking water for towns and cities
Culture
Way of life for a group of people
Immigration
Moving from one country to another to make a home
Interaction
The way people change in their environment
Nomadic
Groups of people who moved from place to place
Irrigation
Moving water from one location to another to help grow crops
Landmark
Object such as a building
Climate
Overall weather in an area over a long period of time
Landforms
Mountains and valleys and plains
Mustang
Wild horse
Adobe
A brick or building material made of earth and straw
Human characteristics
Geographic features that were made by people
Physical characteristics
features of the earth's surface, such as landforms, water systems, climate patterns, and plant and animal life