Questions to Chapter 3 quiz

1. The most common gas in the atmosphere is (the one with the highest percentage, that is)
A. nitrogen.
B. oxygen.
C. carbon dioxide.
D. water vapor


2. Air pressure decreases at higher altitudes because
A. higher altitudes receive less energy from the sun.
B. the force of gravity is stronger at higher altitudes.
C. at higher altitudes, more gas particles escape into space.
D. fewer molecules exist at higher altitudes.


3. The process of warm air rising and cool air sinking is caused by
A. absorption.
B. radiation.
C. conduction.
D. convection.


4. Which of the following factors causes wind?
A. atmospheric gases
B. reradiation of the sun's energy
C. differences in air pressure
D. changes in altitude


5. Which of the following types of air pollution currently causes the most global concern?
A. oxides
B. smog
C. pollen
D. the ozone hole


6. The Clean Air Act is
A. a private organization that fights for better air quality.
B. A branch of the United Nations that monitors level of air pollution around the world.
C. a law in the United States that gives the government authority to regulate air pollutants that can be released in the air from cars and factories.
D. a peaceful demonstration in 1970 that protested manufacturing of diesel vehicles.