Multiple Choice
Your ears "pop" when you ascend to higher altitudes because
A) air pressure is greater at higher altitudes.
B) air temperature is lower at higher altitudes.
C) air pressure is lower at higher altitudes.
D) air is dryer at higher altitudes.
Correct Answer:

Verified
Correct Answer:
Verified
Q90: The process of photosynthesis is important because
Q91: Compared with San Francisco,California,winter air temperatures and
Q92: The ionosphere<br>A)is produced by the action of
Q93: The ocean can be divided into several
Q94: In the tropics,the trade winds drive equatorial
Q96: Temperature decreases with altitude in the<br>A)troposphere.<br>B)stratosphere.<br>C)thermosphere.<br>D)all of
Q97: Circulation of the ocean's surface water results
Q98: The trade wind belts are regions of
Q99: The extremely hot temperature of the thermosphere
Q139: The ionosphere is an electrified ion-rich area<br>A)in