Here's why:
* Kinetic Molecular Theory: This theory states that gas particles are in constant random motion. The higher the temperature, the faster the particles move, and the more kinetic energy they have.
* Pressure: The collisions of gas particles with the walls of the container create pressure. As the particles move faster (due to higher temperature), they collide more frequently and with greater force, resulting in increased pressure.
* Measurement: Temperature is typically measured using a thermometer, which relies on the expansion and contraction of a material due to changes in heat energy.
Therefore, the movement of gas particles in a vessel is a key indicator of the temperature of the gas.
