The study of earth and its people

The exact spot where a location is found

Description of where a place is in relation to the features around it

Natural surroundings of people 

Group of satellites that uses radio signals to determine the exact location of places on earth

A period of 10 years

A period of 100 years

A period of 1000 years 

Joined together inside a common boundary

Huge urban area made up of several large cities and nearby communities

Rolling inland grassland region with fertile soil

Region of parallel mountain chains  

Deep valleys with steep sides

Referring to a body of water wide and deep enough for ships to use

Giant sheet of ice

The high point in a landmass that determines the direction rivers flow

Smaller area of a region

Narrow stretch of land connecting two larger land areas 

Small group of islands

A steep cliff at the edge of a plateau

Tropical grasslands that stretch through eastern Columbia  and Venezuela 

Treeless grassland of Argentina and Uragury

Small river that flows into a larger river

An area where river currents and ocean tide meets