Lesson: Experimental Measurements Physics
In this lesson, we will learn how to recognize types of experimental variables and to understand how variables are used in performing experiments.
Which of the following statements most correctly describes the purpose of performing an experiment?
Which of the following statements does not correctly describe why repeating an experiment many times produces more reliable results than a single performance of the experiment?
Some experimental variables cannot be controlled and may change in ways that cannot be effectively measured or predicted. One or more of the following statements correctly describes how to perform experimental measurements when unknown uncontrollable variables exist. Which statements are correct?
- Allow all variables except the independent variable to be dependent variables.
- Repeat the experiment many times and average the results.
- Repeat the experiment without changing the value of the independent variable and compare the result of the experiment to the result when the value of the independent variable was changed.
- Repeat the experiment many times and retain only the results that are consistent with the predictions of the experiment’s hypothesis.
- Repeat the experiment many times and reject any very anomalous results.