Yes, the labeling of each factor in the lab procedure is correct:
V. the amount of sugar in the solution - Variable
C. whether the sugar is stirred - Constant
V. the temperature of the solution - Variable
C. the type of solute added - Constant
C. the type of solvent used - Constant
Additionally,
Temperature is the independent variable, as it is being manipulated or controlled by the experimenter.
The amount of sugar in the solution is the dependent variable, as it is the outcome or result that is being measured or observed based on the changes in the independent variable.

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