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| The amount of energy an object has because of its motion. |
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| A theory explaining the states of matter, based on the concept that all matter consists of tiny particles that are in constant motion. |
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| Results from the force exerted by a gas per unit surface area of an object; due to collisions of gas particles with the object. |
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| A space where no particles of matter exist. |
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| The pressure exerted by atoms and molecules in the atmosphere surrounding Earth, resulting from collisions of particles with these objects. |
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| An instrument used to measure atmospheric pressure. |
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| Standard atmosphere (atm) |
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| A unit of pressure; the amount required to support 760mm of Mercury in a mercury barometer at 25 degrees Celsius. |
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| The conversion of a liquid into a gas or vapor. |
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| Vaporization that occurs at the surface of a liquid that is not boiling. |
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| A measure of the force exerted by a gas above liquid in a sealed container; a dynamic equilibrium exists between the vapor and the liquid. |
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| The temperature at which the vapor pressure of a liquid is just equal to the external pressure of the liquid. |
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| The boiling point of a liquid at a pressure of 101.3 kPa or 1 atm. |
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| The temperature at which a substance changes from a solid to a liquid. |
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| A solid in which the atoms, ions, or molecules are arranged in an orderly, three-dimensional pattern called a crystal lattice. |
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| The smallest group of particles within a crystal that remains the geometric shape of the crystal. |
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| One of two or more forms of an element in the same physical state. |
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| Describes a solid that lacks an ordered internal structure; denotes a random arrangement of atoms. |
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| Transparent fusion product of inorganic materials that have cooled to a rigid state without crystallizing. |
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| The process in which a solid changes to a gas or vapor without passing through a liquid state. |
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| A graph showing the conditions at which a substance exists as a solid, liquid, or vapor. |
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| The point on a phase diagram that represents the only set of conditions at which all three phrases exist. |
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