Describe how experiment B and experiment C acted as controls for the investigation. [2 marks] Experiment B Experiment

To answer your question regarding how experiment B and experiment C acted as controls for the investigation, here's a structured response:

1. Control Definition: In scientific investigations, controls are experiments or conditions that ensure that the results of the study can be attributed to the variable being tested, rather than other factors.

2. Role of Experiment B and C:

   • Experiment B: This could be a scenario where all variables were kept constant except for one specific factor being investigated. By comparing the results from experiment B with those where the independent variable is changed, researchers can determine the effect of that variable.

   • Experiment C: Similarly, experiment C may serve as another control by providing a baseline measurement or by varying a second independent variable. This helps to further isolate the effect of the primary variable being tested in the main experiment.

Summary

By maintaining consistency across both experiments and altering only one variable at a time, experiments B and C help validate the findings from the primary investigation, ensuring that any observed changes in the dependent variable can be attributed to the specific changes made rather than external factors.