It reall depends on the experiment, but some common ones include:
Temperature
Pressure
pH
Location (as air composition can differ)
Your control
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The answer is the constant variables because they always stay the same.
All variables except one, the experimental variable, are kept constant in an experiment.
All variables except for the independent and dependent variables should be kept the same. The other two will be changed by a fixed amount and by an unknown amount to be discovered during the experiment, respectively.
Constants
a variable factor is anything in your experiment that can change. not like a control factor, which is kept constant through the whole experiment.
The answer is the constant variables because they always stay the same.
All variables except one, the experimental variable, are kept constant in an experiment.
the controlled variables are the factors that are kept constant during an experiment. if they are not kept constant then they may affect the outcome of the experiment. the manipulated variable is the factor that is different between the experiment and the control. the responding variable is the variable that is being measured in the experiment.
All variables except for the independent and dependent variables should be kept the same. The other two will be changed by a fixed amount and by an unknown amount to be discovered during the experiment, respectively.
control
the control
Constants
control
factors in an experiment that are kept the same and not allowed to change or vary.
The control variable, also known as the constant variable, does not vary in an experiment. It is kept constant to ensure that any changes observed are the result of the independent variable being tested.
Control variables are kept constant throughout an experiment to ensure that any changes in the dependent variable are due to the manipulation of the independent variable. Experimental variables, on the other hand, are the factors that are deliberately changed by the researcher to observe their effect on the dependent variable.
An experiment with only one independent variable (manipulated part). All of the other variables are kept constant throughout the trials of the experiment.