The spread of something over a given area.

• Diffusion

• Concentration

• Biosphere

• Atmosphere

All living organisms on Earth, including plants and animals, as well as microorganisms.

• biosphere

• cartography

• contagious diffusion

• formal region

The science of making maps.

• atmosphere

• contagious diffusion

• cartography

• diffusion

The widespread diffusion of a feature or trend throughout a population.

• contagious diffusion

• concentration

• diffusion

• formal region

An area that people share one or more characteristics

• formal region

• biosphere

• diffusion

• concentration

The thin layer of gases surrounding Earth.

• cartography

• atmosphere

• biosphere

• contagious diffusion

The spread of a feature or trend from one place to another over time.

• diffusion

• concentration

• contagious diffusion

• atmosphere

A computer system that displays geographic data

• latitude

• Geotagging

• population density

• GIS

The frequency with which something exists within a given unit of area.

• GIS

• functional region

• Geotagging

• Longitude

Parallel lines that run east and west of the Prime Meridian

• Latitude

• functional region

• Longitude

• Density