Multiple choice general knowledge science & technology

The hot air balloon rises because it is

  1. Denser

  2. Less dense

  3. Equally dense

  4. Gives boost to fly
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hot air balloons rise because heated air inside is less dense than surrounding cool air. This density difference creates buoyant force (displacement). Less dense fluids rise above more dense fluids. Denser objects would sink, not rise.

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