Match the term with the appropriate phrase. You may use each answer once, more than once or not at all.
-component with the greatest concentration in the Earth's atmosphere
A)troposphere
B)tropopause
C)convection cell
D)stratosphere
E)water vapor
F)ozone (O₃)
G)nitrogen (N₂)
H)oxygen (O₂)

Question

Quizplus · Accepted Answer

Nitrogen (N₂) makes up about 78% of the Earth's atmosphere, which is the greatest concentration of any component.

Answer: E
 While water vapor (H₂O) varies in concentration depending on location and climate, it is typically the second most abundant component in the Earth's atmosphere, making up about 0.4% of the atmosphere.

Answer: F
 Ozone (O₃) is an important component of the Earth's stratosphere, where it absorbs harmful UV radiation from the sun. However, it is present in very low concentrations overall in the atmosphere.

Note: The other components listed (troposphere, tropopause, convection cell, oxygen) are important features and molecules within the Earth's atmosphere, but they are not the component with the greatest overall concentration.

Match the Term with the Appropriate Phrase