Physics for IGCSE & O level - Forces And Pressure (Section 8 - No. 3)
Which statements are true about gas pressure?
Gas molecules collide with the walls of the container.
Gas molecules exert a force on the container's walls.
Gas pressure acts in all directions.
The pressure of a gas is determined by the size of its molecules.
Explanation
Gas pressure results from collisions with the container walls and acts in all directions.