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      Question

      The ozone layer in the atmosphere is at a height of

      about            .
      A 25 km Correct Answer Incorrect Answer
      B 50 km Correct Answer Incorrect Answer
      C 100 km Correct Answer Incorrect Answer
      D 200 km Correct Answer Incorrect Answer

      Solution

      Ozone is mainly found in two regions of the Earth's atmosphere. Most ozone (about 90%) resides in a layer that begins between 10 to 17 kilometers above the Earth's surface and extends up to about 50 kilometers.

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