independent variable

The experimental factor that is manipulated; the variable whose effect is being studied.

dependent variable

The outcome factor; the variable that may change in response to manipulations of the independent variable.

controlled variable

Factor in an experiment that a scientist purposely keeps the same

control group

In an experiment, the group that is not exposed to the treatment; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment.

experimental group

In an experiment, the group that is exposed to the treatment, that is, to one version of the independent variable.

Quantitive data

numerical data

qualitative data

Information describing color, odor, shape, or some other physical characteristic


A detailed examination of the elements or structure of something.


The gradual change in a species over time


Ability to generate offspring


the chemical processes that occur within a living organism in order to maintain life.

Interdependence/ response to a stimulus

Mutual dependence between things


all life inherits information through DNA which allows them to function


relatively constant internal physical and chemical conditions that organisms maintain


The process of becoming larger


improvement in human well-being through economic advancement


The basic unit of structure and function in all living things