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| Any substance that has a definite composition. |
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| The process by which one or more substances change to produce one or more different substances. |
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| The physical forms of matter which are solid, liquid, gas and plasma. |
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| The substance or molecule that participates in a chemical reaction. |
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| A substance that forms in a chemical reaction. |
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| Anything that has a mass and takes up space. |
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| A measure of the size of a body or region in a 3D space. |
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| A measure of the amount of matter in an object; a fundamental property of an object that is not affected by the forces that act on the object, such as the gravitational force. |
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| A measure of the gravitational force exerted on an object; It's value can change with the lacation of the object in the universe. |
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| Something that had magnitude, size or amount. |
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| A quantity adopted as a standard of measurement. |
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| A ratio that is derived from the equality of two different units and that can be used to convert from one unit to the other. |
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| A characteristic of a substance that does not involve a chemical change such as density, color or hardness. |
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| The ratio of the mass of a substance to the volume of a substance; Often expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases. |
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| A property of matter that describes a substance's ability to participate in chemical reactions. |
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| The smallest unit of an element that maintains the properties of that element. |
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| A sample of matter, either a single element or a single compound that has definite phsyical and chemical properties. |
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| A substance that cannot be seperatedor broken down to simpler substances by chemical means; all atoms of an element have the same atomic number. |
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| The smallest unit of a substance that keeps all of the physical and chemical propertiesof that substance; can consist of one atom or of two or more atoms bonded together. |
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| A substance made up of atoms of two or more different elements joined by chemical bonds. |
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| A combination of two ormore substances that are not chemically combined. |
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| Describes something that has a uniform structure or composition throughout. |
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| Composed of dissimilar components. |
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