Explain, in general terms, how the moment magnitude earthquake scale works. For example, is a magnitude 2.0 earthquake slightly smaller than a magnitude 3.0, and half as energetic as a magnitude 4.0?


A magnitude 3.0 earthquake is actually much larger than a magnitude 2.0 because every whole number increase in magnitude represents amplitude that is 10 times greater and approximately 32 times more energy is released.

Environmental & Atmospheric Sciences

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Which of the following did not form in the hotter inner part of the solar system according to solar system theory?

A) water vapor B) silicates C) oxides D) metal dust

Environmental & Atmospheric Sciences

Many traditional Islamic cities have a Jewish Quarter and Christian Quarter

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Assume that the irrigation well in the middle of this image was installed by a seed corn company and not by the farmers who own the local wells on either side

If irrigation were stopped immediately, would this localized lowering recover immediately? Why or why not? A) Yes. Water from other parts of the aquifer could replace what was lost. B) No. The average aquifer has a groundwater flow rate of 4 cm/day. C) Yes. The reduced pressure in the aquifer would allow the groundwater to flow faster. D) No. Now that irrigation has stopped, there is no suction necessary to draw the water.

Environmental & Atmospheric Sciences

The structure and dynamics of the current economic activities in South Africa have brought about a(n) __________ system.

a. two-tiered socioeconomic b. economically depressed c. manufacturing-based d. egalitarian e. social democratic

Environmental & Atmospheric Sciences