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the process of studying natural phenomena, involving observations, forming laws and theories, and testing of theories by experimentation
International System of units based on the metric system and units derived from the metric system
the characteristic that any measurement involves estimates and cannot be exactly reproduced
the degree of agreement among several measurements of the same quantity; the reproducibility
a change in the form of the substance, but not in its chemical composition: chemical bonds are not broken
a method for separating the components of a liquid mixture that depends on differences in the ease of vaporization of the components
the general name for a series of methods for separating mixtures by employing a system with a mobile phase and a stationary phase
a substance with constant composition that can be broken down into elements by chemical processes
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