how many variables should be changed purposefully during a scientific experiment?\nnone\n12 or more\none
how many variables should be changed purposefully during a scientific experiment?\nnone\n12 or more\none
Answer
Brief Explanations:
In a scientific experiment, to clearly determine the cause - and - effect relationship, only one variable should be changed purposefully while keeping other factors constant. This is the principle of the single - variable (or controlled - variable) method.
Answer:
C. one