Winds, Storms and Cyclones — Science STD 7 — Question
Gujarat BoardEnglish MediumSTD 7ScienceWinds, Storms and Cyclones1 Mark
MCQ
The shape of a balloon is maintained by:
✓
Air pressure
B
Temperature
C
Wind velocity
D
Density of air.
✓
Answer
Correct option: A.
Air pressure
When a balloon is inflated, the air inside exerts pressure on the inner surface of the balloon. But at the same time, the atmosphere exerts pressure on the outer walls of the balloon uniformly from outside. This gives the balloon its shape.
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