Arizona State University (ASU) FSE100 Introduction to Engineering Practice Exam

An experiment in a scientific context is defined as a method where variables are intentionally manipulated to observe the effects on other variables. This approach allows scientists to establish causal relationships and identify how different factors influence outcomes. Keeping certain variables constant is crucial because it helps isolate the effect of the independent variable on the dependent variable, ensuring that the results can be attributed to the variable of interest rather than other external factors.

The other options do not accurately represent the principles of experimentation. Casual observations do not involve controlled conditions or systematic manipulation of variables, which is essential for an experiment. Making predictions without testing does not constitute an experiment, as it lacks the practical investigation component necessary to validate or refute those predictions. Lastly, simply collecting data without a hypothesis does not qualify as an experiment; a hypothesis provides a focused inquiry that guides the experimentation process and informs the data collection.

By controlling variables and employing a systematic approach to testing, experiments enable scientists to draw valid conclusions and contribute to the body of scientific knowledge. This form of investigation is fundamental to the scientific method, allowing for reproducibility and verification of results.