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Winds, Storms and Cyclones — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceWinds, Storms and Cyclones1 Mark
MCQ
Hot air balloon rises up in the air because:
  • A
    Hot air is heavier than cold air
  • ✓
    Hot air is lighter than cold air
  • C
    Hot air contains water vapors which push the balloon up
  • D
    None of the above
✓

Answer

Correct option: B.
Hot air is lighter than cold air
Hot air rises up because it is lighter than cold air. As the air inside the balloon is hotter than the air surrounding the balloon it rises up.

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