CLICKER PRACTICE TEST FOR NATS101 Section 5

 

Test B

 

  1. Which of these gasses has the most variable concentration?
    1. N2
    2. O2
    3. CO2
    4. H2O

 

  1. Which of these gasses has been steadily increasing since the Industrial Revolution?
    1. N2
    2. O2
    3. CO2
    4. H2O

 

  1. What is the dominant gas in the EarthÕs atmosphere?

A.     N2

B.     O2

C.     CO2

D.     H2O