The dominant element in oceanic crust are
A) silica and aluminum.
B) silica and magnesium.
C) magnesium and aluminum.
D) potassium and iron.
B
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Select by Location in ArcMap is designed for:
A. spatial data query B. attribute data query C. both attribute data query and spatial data query
Discharge permits and the Clean Air Act and Clean Water Act
A) do not allow any wastes to be dumped into natural waterways. B) limit the type but not the amount of wastes dumped into natural waterways. C) limit the amount but not the type of wastes dumped into natural waterways. D) limit the type and the amount of wastes dumped into natural waterways.
Uniformitarian principles assume that features on Earth's surface formed as a result of isolated cataclysms of relatively short duration similar to those observed today.
Answer the following statement true (T) or false (F)
The __________________ part of the North American continent is marked by north-south mountain ranges contained in the Rocky Mountains and Pacific Mountains and Valleys.
-southern -western -interior -northern -eastern