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Air Around Us — Science STD 6 — Question

CBSE BoardEnglish MediumSTD 6ScienceAir Around Us1 Mark
MCQ
We should breathe through the nose and not by the mouth, because ____
  • A
    It is a bad habit.
  • B
    The air is moisturized when we breathe through mouth.
  • ✓
    The hair and mucus in our nostrils trap soot and dust particles present in the air.
  • D
    It is natural phenomenon.
✓

Answer

Correct option: C.
The hair and mucus in our nostrils trap soot and dust particles present in the air.
The hair and mucus in our nostrils trap soot and dust particles present in the air.

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