A halo around the sun or moon indicates that rain may be on the way. Which of the following statements explains why this is the case?

A. A sharp drop in atmospheric pressure may occur.
B. A warm front may be approaching.
C. A cold front may be approaching.
D. A sudden rise in surface dew point temperature may occur.


Answer: B

Environmental & Atmospheric Sciences

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Sheet jointing is a type of jointing due to compressional stress.

Answer the following statement true (T) or false (F)

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Deep-ocean water contains more carbon dioxide than surface water because deep water is colder and has the ability to dissolve more gases. (T/F)

a. true b. false

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Indicate whether the statement is true or false

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