In environmental science, the movement of water, either internally or externally, through a sediment bed. Describes organisms requiring oxygen to live or environments where oxygen is present. Contrast with anaerobic . Describes organisms not requiring oxygen to live or environments where oxygen is not present. Contrast with aerobic .
Aquifers are a major source of drinking water.
The name comes from its usually strong odor. A lung disease caused by exposure to asbestos fibers. See bioassay . A chemical substance with a pH greater than 7. Bases can neutralize acids , and strong bases like lime are corrosive.