The stability of the air layer close to the earth's surface can vary markedly. Much of this variation is caused by:
A) changes in wind direction. B) changes in wind speed.
C) changes in pressure. D) changes in heating or cooling of the surface.
D
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When plutons begin to form and crystallize to form minerals, fluids emanating from them follow cracks and crevasses in adjacent rocks where ____
A)mineral resources such as copper may form B)they escape from the atmosphere and cause air pollution C)they form volcanic lakes D)geologists are able to accurately measure underground temperature E)they rupture Earth's surface and form faults
Explain how Milankovitch cycles explain when ice ages occur
What will be an ideal response?
A person is attracted toward the center of Earth by a 500-N gravitational force. The force of attraction of Earth toward the person is
A) very, very small. B) very, very large. C) 500 N.
Which base is an important starting material in the manufacture of fertilizers?
A) LiOH B) Mg(OH)2 C) NaOH D) NH3