What determines the boundaries of an air mass?
A. Pressure gradient and humidity
B. Temperature and pressure gradient
C. Humidity and temperature
Answer: C
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The resultant of a pair of vectors is always
A. equal to either vector when the angle is 45°. B. less than either vector. C. greater than either vector. D. none of the above
What are stromatolites, and why are they important in Earth history? What will be an ideal response?
According to Figures 12.7.4 and 12.7.5 scientist and professionals
A) are evenly distributed among the major cities in the United States. B) gravitate towards rural cities. C) are not distributed uniformly among cities. D) are concentrated in the more politically liberal states. E) are concentrated in the areas where they went to school.
What is a feedback loop?
What will be an ideal response?