Ozone can be created by all of the following processes EXCEPT
A. scattering by UVB and UVC radiation.
B. UV-C radiation in stratosphere.
C. sunlight acting on hydrocarbons.
D. lightning during thunderstorms.
Answer: A
Environmental & Atmospheric Sciences
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A rock with only 25% of the parent isotope left has been decaying for time equal to ________ half-lives.
A. five B. four C. one D. three E. two
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Small surface irregularities along a fault plane that prevent movement and are generally areas of high strain are termed
A) asperities. B) focal points. C) fore points. D) elastic spots.
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The ________ is the underground spot where an earthquake occurs
Fill in the blank(s) with the appropriate word(s).
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