Final answer:
In Lester's insulating experiment, the independent variable is the type of insulator, the dependent variable is the temperature change, and control variables are factors like the ambient temperature and size of the insulated object that must remain constant for accurate results.
Step-by-step explanation:
Experiment Variables in Lester's Insulation Study
In Lester's experiment to find out what makes the best type of insulator against cold, the independent variable is the type of insulating material being tested. This is because it is the variable that Lester will change to observe the effect it has on insulation effectiveness.
The dependent variable is the temperature change of the object being insulated, as this is what is being measured in response to the different types of insulating materials used.
Control variables are the factors that need to remain constant throughout Lester's experiments to ensure that the results are due to the changes in the independent variable only. Examples of control variables could include the ambient temperature, the initial temperature of the object being insulated, the size and shape of the object, the amount of time the object is exposed to the cold, and the method of measuring temperature.
Control variables are important because they eliminate alternative explanations for the observed changes in the dependent variable, thereby yielding more accurate results in the experiment.