The Presence of Ozone in the Upper Atmosphere Is Important

question 5

Multiple Choice

The presence of ozone in the upper atmosphere is important because

• A) O₃ absorbs outgoing radiation from the earth's surface, thus helping to keep the earth warm.
• B) O₃ absorbs harmful solar radiation.
• C) O₃ dissolves in water droplets and is very reactive.
• D) O₃ is a major reactant in photosynthesis.