- A state of matter where molecules where the mass of the substance does not have the property of flow.
- Movement of organisms in an intentional way between two points in space. Many migrations are seasonal.
An abstraction of the real world that is used to depict, analyze, store, and communicate spatially organized information about physical and cultural phenomena.
- Global Dimming
Global Dimming is a decrease in the amount of sunlight reaching the surface of the earth, believed to be caused by pollution in the atmosphere
Climatic condition where water loss due to evapotranspiration is greater than water inputs through precipitation.
Conversion of marginal rangeland or cropland to a more desert like land type. Desertification can be caused by overgrazing, soil erosion, prolonged drought, or climate change.
General pattern of weather conditions for a region over a long period time (at least 30 years).