Question

10
which of the following statements describes all the variables in an experiment?
a. all variables are changed from one part of the experiment to another
b. all variables affect the results of the experiment
c. all variables are kept the same from one part of the experiment to another
d. all variables are measured to provide data for the experimental results

Explanation:

In an experiment, variables (independent, dependent, controlled) all impact the outcome. Option A is wrong as only the independent variable is changed (others controlled). Option C is wrong as the independent variable changes. Option D is wrong as not all variables are measured (e.g., controlled variables are kept constant, not measured for data). So B is correct as all variables (by their nature in the experimental setup) affect the results.

Answer:

B. All variables affect the results of the experiment