Eight natural elements compose 98.5 of the Earth's crust by weight. Which of the following is not one of those elements?
A) potassium B) nitrogen C) oxygen D) aluminum E) silicon.
Question 2
A mT air mass is likely to be ________ than a cT air mass because the mT air mass ________.
A) drier; is a cold air mass
B) wetter; forms over the ocean
C) drier; forms under the equatorial low
D) wetter; is warmer than the cT air mass
E) hotter; forms over the ocean
