Examlex
What characteristic of a star primarily determines its location on the main sequence?
Experimental Control
The practice of eliminating or managing variables that can affect the outcome of an experiment, except for the variable being studied.
Causal Relationships
Refers to the connection between two variables where a change in one variable directly causes a change in the other variable.
Internal Validity
The extent to which a study can rule out or make unlikely alternate explanations of the results, thereby attributing the results directly to the effect of the independent variable.
National Science Foundation
A United States government agency that supports fundamental research and education in all non-medical fields of science and engineering.
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