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Air Around Us — Science STD 6 — Question

CBSE BoardEnglish MediumSTD 6ScienceAir Around Us1 Mark
MCQ
Mountaineers carry oxygen cylinders with them because:
  • A
    There is no oxygen on high mountains.
  • ✓
    There is deficiency of oxygen on mountains at high altitude.
  • C
    Oxygen is used for cooking.
  • D
    Oxygen keeps them warm at low temperature.
✓

Answer

Correct option: B.
There is deficiency of oxygen on mountains at high altitude.

As we go up above the sea level, the atmospheric pressure goes on decreasing and the amount of oxygen also decreases at higher altitude. This is why, mountaineers carry oxygen, cylinders with them.

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