The primary source of energy for the earth's atmosphere is:

The physical and human geographies of North America are greatly affected by the region's surface _______________.

Fill in the blank(s) with the appropriate word(s).

In analyzing continental drift, the name given to the northern supercontinent was ____

a. Laurasia b. Laurentia

c. Baltica d. Gondwana e. northern Pangaea

Why does Bowen's reaction series predict that mafic intrusive rocks should be much more common

than felsic intrusive rocks? What will be an ideal response?

The permeability of a rock layer on which perched water sits is

A. equal to the hydraulic gradient. B. very high. C. very low.