Fair Testing - O Wings We are learning to carry out a fair test.
What is a fair test?
Fair testing... 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 affected the results of the test.
O Wings We are going to make O Wings for our science experiment. Here’s an example of an O Wing:
The Independent Variable The independent variable is the variable that we have changed. What things could we change on this model?
The Independent Variable The independent variable is the variable that we have changed. What things could we change on this model? - Shape - Size of Os - Length of Straw - The number of shapes (Os) - Distance between shapes - Position of the shapes Etc.
Our experiment Within your groups you will choose ONE independent variable to focus on. Which variable will you change?
The Dependent Variable This the thing that is measured. What things might we want to measure?
The dependent variable The variable that we will measure today is the length that the O Wing has travelled.
Controlled Variables These are the variables that stay the same to make sure that our test is fair. What do we need to keep the same?
Your task: You need to create 3 O wings where the independent variable is different each time. E.g. the length of the straw will be different on each of your 3 models. Remember EVERYTHING else must stay the same! You should record your results in the table.
What did we find?
Which variable is which? Independent? Dependent? Control?
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