An increase in earthquake moment magnitude by one whole number (for example, from 6 to 7) on the Richter scale means that the energy released has increased by a factor of about ____

a. 3
b. 32
c. 330
d. 3,000
e. 31,000


b

Environmental & Atmospheric Sciences

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How is the protective ozone shield formed? What causes its natural breakdown?

What will be an ideal response?

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The holy cities of Mecca and Medina are located in __________.

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