What causes the pressure of a gas inside a closed container?
AParticles hitting the container walls
BParticles sticking to each other firmly
CParticles losing mass as they move
DParticles melting against the walls
Answer & Solution
Correct answer: A. Particles hitting the container walls
1. Gas particles move very fast and in every direction.
2. They keep bumping against each other and against the inside of the container.
3. The force of all those bumps on the walls is what we call gas pressure.
4. More particles inside means more bumps, so the pressure is higher.
_Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), What is gas pressure?_