A group used as a standard of comparison for checking the results of an experiment.
An interval of time during which a sequence of a recurring succession of events or phenomena is completed.
A variable whose values are determined by one or more (independent) variables.
A state in which opposing forces or influences are balanced.
A formula derived by inference from scientific data that explains a principle operating in nature.
A variable whose value is specified first and determines the value of one or more other values.
The sum of a set of numbers divided by the number of elements in the set.
The middle number or item in a set of numbers or objects arranged from least to greatest, or the mean of the two middle numbers when the set has two middle numbers.
The number or object that appears most frequently in a set of numbers of objects.
A description or analogy used to help visualize something (such as an atom) that cannot be directly observed.
To watch carefully, especially with attention to details or behavior for the purpose of arriving at a judgment.
A fact or event of scientific interest susceptible to scientific description and explanation.
Involving quality or kind.
Involving the measurement of quantity or amount.
To duplicate experiments, procedures or samples.
A statement of an order or relation of phenomena that, so far as is known, is invariable under the given conditions.
Principles and procedures for the systematic pursuit of knowledge involving the recognition and formulation of a problem, the collection of data through observation and experiment, and the formulation and testing of hypotheses.
A plausible or scientifically acceptable general principle or body of principles offered to explain phenomena.
Each of the digits of a number that are used to express it to the required degree of accuracy.
Human innovation in action that involves the generation of knowledge and processes to develop systems that solve problems and extend human capabilities. The innovation, change, or modification of the natural environment to satisfy perceived human needs and wants.
A quantity that may assume any one of a set of values.