Everything should be held constant except for one independent variable, the one thing you change. If you don't keep everything else constant, you can't determine the cause of changes in the dependent variable.
Constants are factors in an experiment that stay the same. This should not be confused with controls -- which is a standard used for comparison
The chemical composition and physical state of substances can change during an experiment.For example two reactants in solid or liquid form can react in an experiment to give a product in a gaseous form.
An experiment should be designed to answer a specific question.
Controlled parameters
You don't want a lot of the factors && different things in an experiment to be changed because if they are all changed every now and then, it will completely change the experiment.
Constants are factors in an experiment that stay the same. This should not be confused with controls -- which is a standard used for comparison
The chemical composition and physical state of substances can change during an experiment.For example two reactants in solid or liquid form can react in an experiment to give a product in a gaseous form.
In an experiment, the variable that is held constant is called the control variable. This variable is not changed or manipulated during the experiment in order to isolate the effect of the independent variable on the dependent variable.
It depends on what the chemicals are and the experiment itself. Also, it's not clear if you're asking about what the reagents are held in for storage prior to the experiment, what they are held in temporarily during the course of the experiment but before they are actually combined, or what they are held in when they are in the process of being combined.
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Brain root
A experiment should only have one variable.
An experiment should be designed to answer a specific question.
The variable that is held constant in an experiment is called the controlled variable. This variable is kept consistent to ensure that any changes in the outcome of the experiment are due to the manipulated variable being tested.
Controlled parameters
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