Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations. In what way do laboratory experiments primarily differ from other forms of scientific investigations?

Question

A.
A laboratory experiment is the only accepted form of investigation within the scientific community.
B.
Studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.
C.
Data can only be generated through laboratory experiments, not other forms of investigation.
D.
Laboratory experiments involve the identification and control of variables.

Answer 1

The correct answer is: D. Laboratory experiments involve the identification and control of variables.

Laboratory experiments are specifically designed to allow researchers to manipulate independent variables while keeping other variables constant, which is essential for determining cause-and-effect relationships. This level of control is often not possible in observational field studies, where conditions are more variable and uncontrolled. Model-building may also not involve the same degree of controlled experimentation as laboratory settings.