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- An experiment in which only one thing (variable) is changed and another is recorded. All other things are kept the same.. If more than one things changes in a test or experiment this is not a fair test. Then we cannot know for certain what caused the changes.
www.bbc.co.uk/bitesize/articles/zk977yc
A Fair Test is based on just one difference or change (the Independent variable). In most experimental inquiries, we want to figure out if the change we make is actually causing the effect we see. In a fair test, it is important to only change one variable at a time.
- Tomatosphere
How does the exposure to space affect the germination of...
- Tomatosphere
Learn how to make a test fair when working scientifically with this Year 4 Bitesize Science guide.
It is important for an experiment to be a fair test. You conduct a fair test by making sure that you change one factor at a time while keeping all other conditions the same. For example, let's imagine that we want to measure which is the fastest toy car to coast down a sloping ramp.
Scientific tests need to be fair if they are going to be accurate. Find out what makes a fair test in this Bitesize Primary KS2 Science guide.
They will need experimental data in order to test their prediction. As learners are asked to plan an investigation to test their hypothesis they are prompted to think about what makes a fair test and how to get reliable data.
All scientific fair tests involve variables. Variables are things that can be changed (independent), measured/observed (dependent), or kept the same (controlled) in an investigation. When planning a fair test investigation, to make it fair, we need to identify the variables.
A fair test is a test which controls all but one variable when attempting to answer a scientific question. Only changing one variable allows the person conducting the test to know that no other variable has impacted the results of the test.
