Multiple choice

Which of the following statements is true?

  1. Ozone is a monoatomic form of oxygen.

  2. Ozone is a poisonous gas.

  3. Ozone is present in the lower atmosphere.

  4. Ozone reflects the sun rays.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Ozone is a potent respiratory hazard and pollutant near ground level. The ozone layer (a portion of the stratosphere with a higher concentration of ozone, from two to eight ppm) is beneficial, preventing damaging ultraviolet light from reaching the Earth's surface, to the benefit of both plants and animals.  

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