It is not possible for me to accurately determine the independent and dependent variables of your experiment without further information about the specific lab activity you are completing. In general, the independent variable is the factor that is being manipulated or changed in an experiment, while the dependent variable is the factor that is being measured or observed.
In order to clearly define the independent and dependent variables of your experiment, you should first review the summary questions provided at the end of the virtual lab activity and consider what variables are being manipulated or changed and what variables are being measured or observed. You should then describe these variables in your lab report, making sure to specify which is the independent variable and which is the dependent variable.
If you experienced any errors or other factors that might affect your outcome, it is important to note these in your lab report as well, as they can impact the accuracy and reliability of your results. It is also helpful to include any observations or notes that you made during the experiment, as these can provide additional context and insight into your findings.