What factors determine the size and shape of a volcano?
What will be an ideal response?
The size is determined by the volume of magma (or lava) erupted. The shape is determined by the type of erupted material (lava, loose pyroclastic material, or both). Viscosity of erupted lava determines the steepness of the volcano slope if it is composed mostly of lava flows.
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The oil company responsible for the oil spill of the Valdez was ____.
A. Alaska B. Gulf C. Exxon D. Sunoco E. Texaco
How does evaporation effect land-water heating differences?
A) Evaporation tends to increase temperatures over land. B) Evaporation tends to lower temperatures more over water bodies than over land. C) Evaporation tends to increase the temperature over water. D) Evaporation affects land more than ocean surfaces. E) Evaporation affects the temperature of land surfaces and water bodies the same amount.
According to the "rule of 70," if a country has a population increase of 2% per year, how long will it take for it to double in size?
A) 35 years B) 70 years C) 72 years D) 140 years E) it can not be determined
Which of the following pollution sources would be considered to be a non-point source?
A. all of the answers listed here B. residual oil in parking lots from leaking cars and trucks C. pesticides spread on farm fields D. cows on dairy farms E. lawn fertilizers in housing developments