Explain why earthquakes occur at greater depths at convergent boundaries than at divergent boundaries. What will be an ideal response?
At convergent boundaries the compressional forces that occur as a result of two plates
pushing together produces violent geological activity. One plate is subducted underneath the
other plate, the leading edge pulled downward by gravity into the mantle. Lithospheric crust
will melt as the plate plunges downward and its temperature rises. Volatile components, such
as water and carbon dioxide, are driven off and rise toward the overriding plate. Magma rises
to the surface and causes volcanic eruptions and earthquakes. Earthquakes that form in these
regions may occur at greater depth along the sliding edge of the subducting plate as it
descends into the mantle.
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Nitrogen may be returned from plants and animals back to the soil as leaves, skin , hair and dead bodies.
Answer the following statement true (T) or false (F)
An increase of disorder means
A. no particular change in entropy. B. less entropy. C. greater entropy. D. none of the above
How did Hurricane Floyd contribute to dramatic water pollution in North Carolina?
A) Intense rain and river flooding caused poorly sited pig farm waste lagoons to overflow. B) Intense winds damaged pig farm waste treatment facilities, rendering them inoperable. C) Pig carcasses were washed into the ocean, where they decayed. D) Careful preparation by pig farm operators prevented major water contamination despite the intensity of the hurricane.
Where on this cross section would water at the surface infiltrate to become groundwater?
A. 1, 2, and 3 B. 2 and 4 C. 1 and 3 D. 2 only E. 4 only