Final answer:
Opinions are not a standard component of the experimental process which typically includes models, controls, and variables. Opinions can introduce subjectivity and are therefore excluded from scientific methodology, in favor of objective observations and measurements.
Step-by-step explanation:
All of the following are standard components of the experimental process EXCEPT opinions. The experimental process typically includes elements such as models, controls, and variables. Models help to simulate and predict phenomena, controls are used to establish a baseline to compare the effects of the variables, and variables are aspects of the experiment that are manipulated to observe the outcome.
In contrast, opinions have no place in the experimental process as they are subjective and can skew the results. Whereas experimental controls allow for a comparison between groups where all other variables are kept constant except the one being tested. The control group is instrumental in determining the effect of the variable being investigated in the experiment.
For example, in a controlled experiment testing the growth of algae with and without phosphate, the presence of phosphate is the experimental variable, the ponds without phosphate serve as the control, and any change in algae growth is statistically analyzed.