One variable at a time.
a scientist can do another experiment or change their hypothesis.
One variable at a time.
2
control variable
The variable that a scientist observes to change while conducting an experiment is called the independent variable. This is the variable that is deliberately manipulated by the scientist to observe its effect on the dependent variable.
Bias occurs when scientists' expectations change how the results of an experiment are viewed.
Bias occurs when scientists' expectations change how the results of an experiment are viewed.
The Answer is Independent Variable.
The variable that the scientist changes in an experiment is called the independent variable. This is the factor that the scientist manipulates or controls to observe its effects on the dependent variable, which is the factor being measured or observed.
An independent variable is a part of an experiment that can change. This is the variable that the scientist manipulates or controls in order to observe its effect on the dependent variable.
A manipulative variable is something that you will keep the same.
Experiment- "In a experiment, the scientist deliberately makes certain changes in the world about him so that he can observe the consequences."