The auroras are caused by charged particles originating from ____

A) Earth's atmosphere
B) solar wind
C) the North Pole
D) the South Pole


B

Environmental & Atmospheric Sciences

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Where was North America 150 million years ago?

A. closer to Africa and South America B. next to Antarctica C. over the south pole D. next to Australia E. None of these.

Environmental & Atmospheric Sciences

The single factor ________ most strongly predicts the NPP of terrestrial ecosytems

Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences

The dispersion of pollutant material into the atmosphere depends on the wind and the ________ of the air layer

A) depth B) stability C) temperature D) visibility E) pressure

Environmental & Atmospheric Sciences

Which of the following is a secondary messenger?

A) cAMP B) estradiol C) vasopressin D) none of these

Environmental & Atmospheric Sciences