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13.1 and 14 Gases

Kinetic energy The energy an object has because of its motion.
Kinetic theory a theory explaining the states of matter, based on the concept that all matter consists of tiny particles that are in constant motion.
Gas pressure Results from the force exerted by a gas per unit surface area of an object; due to collisions of gas particles with the object.
Vacuum a space where no particles of matter exist.
Atmospheric pressure the pressure exerted by atoms and molecules in the atmosphere surrounding Earth, resulting from collisions of these particles with objects.
Pascal the SI unit of pressure.
Compressibility a measure of how much the volume of matter decreases under pressure.
Diffusion the tendency of molecules to move toward areas of lower concentration until the concentration is uniform throughout.
Created by: annericson