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| an observation of natural phenomena carried out in a controlled manner so that the results can be duplicated and rational conclusions obtained |
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| a concise statement of mathematical equation about a fundamental relationship or regularity of nature |
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| a mere assumption or guess |
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| particular conception or view of something to be done or of the method of doing it; a system of rules or principles |
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| the substance or substances of which any physical object consists or is composed |
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| law of conservation of mass |
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| the principle that matter cannot be created or destroyed |
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| having three dimensions (length, breadth, and thickness), as a geometrical body or figure. |
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| composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid. |
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| a substance possessing perfect molecular mobility and the property of indefinite expansion, as opposed to a solid or liquid. |
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| (chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container) |
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| any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition |
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| process in which one or more substances are changed into others |
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| a property used to characterize physical objects |
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| a characteristic of a substance that becomes known during a chemical reaction |
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| physical matter or material |
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| one of a class of substances that cannot be separated into simpler substances by chemical means |
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| composed of two or more parts, elements, or ingredients |
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| law of definite proportions |
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| every definite compound always contains the same elements in the same proportions by weight |
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| an aggregate of two or more substances that are not chemically united and that exist in no fixed proportion to each other |
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| any combination of substances that has uniform composition and properties |
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| any combination of substances that has uniform composition and properties |
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| a stage in a process of change or development |
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| all the nonzero digits of a number and the zeros that are included between them or that are final zeros and signify accuracy |
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| a method for expressing a given quantity as a number having significant digits necessary for a specified degree of accuracy, multiplied by 10 to the appropriate power |
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| a complete metric system of units of measurement for scientists |
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| a unit of length, equal to one tenth of a millimicron, or one ten millionth of a millimeter, primarily used to express electromagnetic wavelengths |
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| pertaining to or noting a temperature scale (Celsius scale) in which 0° represents the ice point and 100° the steam point. |
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| the base SI unit of temperature, defined to be 1/273.16 of the triple point of water |
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| a unit derived by combining SI base units |
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| unit of volume equal to a cubic decimeter |
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| method of calculation in which one carries along the units for quantities |
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| A numerical factor used to multiply or divide a quantity when converting from one system of units to another |
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