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Our Environment — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceOur Environment1 Mark
MCQ
Ozone hole means :
  • A
    Hole in the stratosphere
  • B
    Same concentration of ozone
  • ✓
    Decrease in the concentration of ozone
  • D
    Increase in the concentration of ozone
✓

Answer

Correct option: C.
Decrease in the concentration of ozone
Due to the depletion of stratospheric ozone, a seasonal hole in the ozone layer at polar regions is formed in the atmosphere. This is known as the ozone hole.
The depletion of ozone causes harmful $\ce{UV}$ rays to reach the earth. $\ce{UV}$ radiations are responsible for causing skin cancers and various diseases in humans.

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