Multiple choice

Which one of the following gases present in the upper atmosphere protects the earth from harmful ultraviolet radiations?

  1. Carbon dioxide

  2. Ozone

  3. Nitrogen

  4. Oxygen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ozone in the upper atmosphere (stratosphere) absorbs harmful ultraviolet radiation from the sun, protecting living organisms on Earth. The ozone layer is crucial for preventing UV-induced skin cancer and ecological damage. Carbon dioxide, nitrogen, and oxygen do not provide this UV protection.

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