Partial pressure is the individual pressure that a specific gas in a mixture would exert if it alone occupied the same volume.
Dalton's Law: This law states that the total pressure exerted by a mixture of gases is equal to the sum of their individual partial pressures.
These are laws that describe how gases behave under varying conditions of temperature, volume, and pressure.
This is the force per unit area exerted against a surface by the weight of air above that surface in Earth's atmosphere.