Answer:
When discussing drought, one must have an understanding of aridity and the difference between the two. Aridity is defined, in meteorology and climatology, as "the degree to which a climate lacks effective, life-promoting moisture" (Glossary of Meteorology, American Meteorological Society). Drought is "a period of abnormally dry weather sufficiently long enough to cause a serious hydrological imbalance". Aridity is measured by comparing long-term average water supply (precipitation) to long-term average water demand (evapotranspiration). If demand is greater than supply, on average, then the climate is arid. Drought refers to the moisture balance that happens on a month-to-month (or more frequent) basis. If the water supply is less than water demand for a given month, then that month is abnormally dry; if there is a serious hydrological impact, then a drought is occurring that month. Aridity is permanent, while drought is temporary.
E. indoor plumbing
because this comes in agriculture wich hellped southeast development
The Grand Canyon is about 5-6 million years old, or was formed about 5-6 million years ago
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Relation between buoyancy, isostatic equilibrium, and epeirogenic processes</u></h2>
Buoyant force or buoyancy, is the force exerted in an object which is fully or partially occupied in a fluid. Isostatic equilibrium is the gravitational equilibrium between earth's crust and underlying mantle. while epeirogenic process is the depression of land having long wavelengths.
Both epeirogenic process and isostatic equilibrium uses the principle of buoyancy. The crust of the Earth or the lithosphere floats over underlying mantle at an elevation depending upon its density and thickness.
