Which layer's ozone is responsible for absorbing ultraviolet radiation from the sun?

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Prepare for the SkillCat EPA Type 2 Test with interactive flashcards and multiple-choice questions. Each question is accompanied by hints and explanations. Get ready to pass your exam!

Multiple Choice

Which layer's ozone is responsible for absorbing ultraviolet radiation from the sun?

Explanation:
UV radiation is absorbed most effectively by ozone in the stratosphere, where the ozone layer sits. The ozone (O3) molecules there absorb the sun’s high-energy UV-C and a large portion of UV-B, converting that energy to heat and shielding life on Earth from the harmful wavelengths. Ozone in the troposphere acts mostly as a pollutant and isn’t a reliable protective shield, and the exosphere and mesosphere contain far less ozone, so their capacity to absorb UV is minor compared to the stratosphere.

UV radiation is absorbed most effectively by ozone in the stratosphere, where the ozone layer sits. The ozone (O3) molecules there absorb the sun’s high-energy UV-C and a large portion of UV-B, converting that energy to heat and shielding life on Earth from the harmful wavelengths. Ozone in the troposphere acts mostly as a pollutant and isn’t a reliable protective shield, and the exosphere and mesosphere contain far less ozone, so their capacity to absorb UV is minor compared to the stratosphere.

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