51. What is the name of the atmospheric layer that contains the ozone layer?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
52. Which of the following is a primary cause of acid rain?
a) Carbon dioxide emissions
b) Volcanic eruptions
c) Industrial emissions of sulfur dioxide and nitrogen oxides
d) Emissions from forest fires
53. What is the name of the atmospheric phenomenon that causes the Northern Lights?
a) Ozone depletion
b) Greenhouse effect
c) Solar wind
d) Ionosphere
54. Which of the following is a common indoor air pollutant that can cause respiratory problems?
a) Carbon monoxide
b) Nitrogen dioxide
c) Carbon dioxide
d) Oxygen
55. What is the name of the atmospheric layer above the mesosphere where meteors burn up upon entering the Earth’s atmosphere?
a) Thermosphere
b) Stratosphere
c) Troposphere
d) Ionosphere
