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Learn how to make a test fair when working scientifically with this Bitesize Science guide.
Conducting a fair test is one of the most important ingredients of doing good, scientifically valuable experiments. To insure that your experiment is a fair test, you must change only one factor at a time while keeping all other conditions the same .
Key points. A variable is a factor that can be changed in an experiment. Identifying control variables, independent and dependent variables is important in making experiments fair. Knowing about...
Following a good method is essential in generating valid data during an experiment. Learn the most important considerations with BBC Bitesize. For students between the ages of 11 and 14.
- Independent Variable
- Dependent Variable
- Examples of Independent and Dependent Variables
- How to Tell The Independent and Dependent Variable Apart
- How to Graph Independent and Dependent Variables
- References
The independent variable is the factor the researcher changes or controls in an experiment. It is called independent because it does not depend on any other variable. The independent variable may be called the “controlled variable” because it is the one that is changed or controlled. This is different from the “control variable,” which is variable ...
The dependent variable is the factor that changes in response to the independent variable. It is the variablethat you measure in an experiment. The dependent variable may be called the “responding variable.”
Here are several examples of independent and dependent variables in experiments: 1. In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score. 2. You want to know which brand of fertilizer is best for your plants. The br...
If you’re having trouble identifying the independent and dependent variable, here are a few ways to tell them apart. First, remember the dependent variable depends on the independent variable. It helps to write out the variables as an if-then or cause-and-effect sentence that shows the independent variable causes an effect on the dependent variable...
Plot or graph independent and dependent variables using the standard method. The independent variable is the x-axis, while the dependent variable is the y-axis. Remember the acronym DRY MIX to keep the variables straight: D = Dependent variable R = Responding variable/ Y = Graph on the y-axis or vertical axis M = Manipulated variable I = Independen...
Babbie, Earl R. (2009). The Practice of Social Research(12th ed.) Wadsworth Publishing. ISBN 0-495-59841-0.di Francia, G. Toraldo (1981). The Investigation of the Physical World. Cambridge University Press. ISBN 978-0-521-29925-1.Gauch, Hugh G. Jr. (2003). Scientific Method in Practice. Cambridge University Press. ISBN 978-0-521-01708-4.Popper, Karl R. (2003). Conjectures and Refutations: The Growth of Scientific Knowledge. Routledge. ISBN 0-415-28594-1.Your experiment tests whether your prediction is accurate and thus your hypothesis is supported or not. It is important for your experiment to be a fair test. You conduct a fair test by making sure that you change only one factor at a time while keeping all other conditions the same.
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How to conduct a science experiment. Includes tips for preparing data tables and recording observations.
