6. Atmosphere and Climate Change
Atmospheric Composition — Quiz
Test your understanding of atmospheric composition with 5 practice questions.
Practice Questions
Question 1
Which gas makes up the largest portion of Earth's atmosphere near the surface?
Question 2
What term is used for the gases in the atmosphere that are always present in relatively constant proportions, such as nitrogen and oxygen?
Question 3
Which gas is a major greenhouse gas that has increased because of human activities such as fossil fuel burning and deforestation?
Question 4
Why is water vapor described as a variable gas in the atmosphere?
Question 5
What is the main role of the ozone layer in the atmosphere?