Pressure in Liquids and Gases
2 marks · EasyA balloon filled with air pops. Explain, with reference to pressure in gases, why the pieces of the balloon fly out in all directions.
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The air inside the balloon exerts pressure equally in all directions, so when the balloon pops, the force acts outwards everywhere, making the balloon break in all directions.
Also accept: Air pressure in the balloon pushes equally in every direction, so when the balloon breaks, the pressure is released all around, causing pieces to move outward.
Common mistakes: Saying only gravity is responsible.
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Marking points
B1 · 1 mark · States gas/air/pressure acts equally in all directions inside balloon.
B1 · 1 mark · Links released pressure to the pieces flying out in all directions when balloon pops.
Worked solution
The air in the balloon pushes equally in all directions. When the balloon pops, this pressure pushes pieces outward in every direction.