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a constant
The answer to your question is the Control Group.
variables
Yes, the independent variable does change because it is what a scientist purposely changes during an experiment.
Independent Variable
A variable in science is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by a scientist in the experiment. The depended variable is what you measure in the experiment and what is affected during the experiment. A controlled variable is one which the researcher holds constant (controls) during an experiment.
a variable
the part of an experiment that changes is called the variable.
Controlled (or control) variables are things that are kept the same during an experiment. There are usually many- for example, when testing how light intensity affects photosynthesis, the controlled variable would be the type of plant used, or the color of the light.
Inquiries
Theories
No it cannot be changed in an expirement
The control is an object where you change nothing; you compare it to the thing that you test.
The controlled variables, I think is the answer you are looking for.
variables i thimk
Pretty much having controlled variables. Controlled variables are something in the experiment that must remain the same through all tests. For example, if you are testing the decay of an apple... The temperature that the two fruits are enduring during the experiment must be the exact same.
a constant