Charles’ Law states that if a gas is heated up and the pressure does not change, the volume will. So, for a fixed mass of gas at a constant pressure, volume ÷ temperature will remain the same.
Boyle’s Law states that for a gas at a constant temperature, pressure × volume is also constant. So, increasing pressure means that volume will decrease providing that the temperature remains constant.
Eventually at absolute zero, which is -273°C, the molecules stop moving and the gas does not exert any pressure at all. This temperature is known as absolute zero.
The average kinetic energy of the particles in a gas is directly proportional to the Kelvin temperature of the gas.