Competition Practice Day 11

Over the course of the next few months, I will post some multiple choice questions for you to answer. On the final meeting on May 14, if you answer all of the questions correctly, I will give you a cookie. ;)

MC Practice Day 11

21. What can you find between the mesosphere and thermosphere?
        (A) tropopause

        (B) mesopause

        (C) thermopause

        (D) stratopause

        (E) exopause

22. The atmosphere is mainly composed of which two gases?

        (A) nitrogen and oxygen

        (B) oxygen and water vapor

        (C) nitrogen and water vapor

        (D) oxygen and carbon dioxide

        (E) nitrogen and carbon dioxide