Explain the factors that determine whether or not convection occurs
What will be an ideal response?
Viscosity, gravity, and temperature are important controls on convection. Gravity causes the cooler, denser material to sink, whereas viscosity inhibits motion of the mass. Convection is favored by those conditions which overcome viscosity, including large mass, long time, and higher temperatures.
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A lake or area of the ocean with a large supply of nutrients is referred to as
A. mesotrophic. B. hypereutrophic. C. eutrophic. D. estuarine. E. oligotrophic.
The subsolar point migrates annually between 47° N and 47° S latitude
Indicate whether the statement is true or false
________, a coarse-grained rock composed of pyroxene and olivine, is the most abundant ultramafic rock.
A. Granite B. Diorite C. Hematite D. Peridotite E. Gabbro
A dynamic high-pressure area at the surface is closely associated with strong ________
A) ascent of air B) descent of air C) winds D) storms E) tornadic spin