Physical geography

Physical geography

Industry: Geography

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Physical geography

Glacial surge

Geography; Physical geography

A rapid forward movement of the snout of a glacier.

Glacial polish

Geography; Physical geography

The abrasion of bedrock surfaces by materials carried on the bottom of a glacier. This process leaves these surfaces smooth and shiny.

Gas

Geography; Physical geography

A state of matter where molecules are free to move in any direction they like. The state of matter where the substance completely fills any container that it occupies.

Gap

Geography; Physical geography

A spatial opening in a plant community. Can be caused by natural death or by some other abiotic or biotic disturbance.

Gamma radiation

Geography; Physical geography

A type of ionizing, electromagnetic radiation that readily penetrates the body tissues of organisms. Has a wavelength less than 0.03 nanometers.

Genetic diversity

Geography; Physical geography

Genetic variability found in a population of a species or all of the populations of a species. Also see biodiversity, ecosystem diversity, and species diversity.

Genetic adaptation

Geography; Physical geography

Changes in the genetic makeup of organisms of a species due to mutations that allow the species to reproduce and gain a competitive advantage under changed environmental conditions.