Examlex
A series of lines - solid or solid and broken - arranged in specific patterns that show a surface are known as ____________________ lines.
Independent Variable
The variable in an experiment that is manipulated or changed by the researcher to determine its effect on the dependent variable.
Placebo
A substance with no therapeutic effect, often used as a control in testing new drugs.
Control Group
In an experiment, a group of subjects that does not receive the treatment being tested and is used as a benchmark to measure how the other tested subjects do.
Dependent Variable
In scientific research, the variable that is tested and measured; it is 'dependent' on the independent variable.
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