Physics 0625 · IGCSE · Density

Density — practice question

What makes a balloon filled with hot air rise?

  • ACold air is less dense than hot air.
  • BCold air is more dense than hot air.
  • CHeat rises.
  • DThe density of the balloon is greater than the density of the surrounding gas.

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI