________ is the most abundant and important greenhouse gas.
A. O3
B. CO2
C. O2
D. CO
Answer: B
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A stream channel is widened by erosion, but stream discharge is unchanged. Which of the following statements must be true?
A. Depth decreased and/or velocity decreased B. Depth decreased and/or velocity increased C. Depth increased and/or velocity decreased D. Depth increased and/or velocity increased
Surface values of dissolved oxygen may exceed 100% saturation.
Answer the following statement true (T) or false (F)
The elastic rebound theory fails to explain some earthquakes because:
a. the surface breaks are not elastic in nature b. elastic rebound only occurs during large-magnitude earthquakes c. the theory does not explain earthquakes of tensional failure at divergent plate boundaries d. plastic deformation is more likely than elastic for deeper earthquakes
The pressure announced on last night's television weather broadcast was 29.92. Explain how this was measured and give the units. Would this be considered an unusually large or low pressure value?
What will be the ideal response?