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theory A well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment variable not consistent or having a fixed pattern liable to change. beaker (plural beakers) A flat-bottomed vessel, with a lip, used as a laboratory container. technology the application of scientific knowledge for practical purposes, especially in industry. SI The SI base units are the standard units of measurement defined by the International System of Units standard a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity.

model a physical, mathematical, or otherwise logical representation of a system, entity, phenomenon, or process scientific law laws of science are statements, based on repeated experiments or observations, scientific method scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. independent variable Dependent and independent variables are variables in mathematical modeling, statistical modeling and experimental sciences mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. graph In mathematics, the graph of a function f is the set of ordered pairs, hypothesis a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Experiment a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.