Final answer:
In the described experiment, the 'Temperature of vinegar' is most likely the independent variable as it is the condition being manipulated to observe its effect on the reaction time of baking soda, the dependent variable.
Step-by-step explanation:
An experiment is a scientific procedure conducted to make a discovery, test a hypothesis, or demonstrate a known fact. In such an undertaking, the independent variable (IV) is the factor that the experimenter manipulates or changes, while the dependent variable (DV) is the factor that is observed or measured in response to changes in the IV.
Considering the experiment described, there are a few potential variables:
- Temperature of vinegar (°C)
- Reaction time of baking soda (s)
- The number of trials
- Type of vinegar used
In this scenario, the independent variable is most likely the 'Temperature of vinegar,' as this is the condition that appears to be manipulated to observe its effect on the reaction time of baking soda, which would be the dependent variable.
The number of trials is part of the experimental design to ensure consistency and accuracy, whereas the type of vinegar used might potentially be another IV if the purpose of the experiment is to compare different vinegars. Without additional context, the most probable IV is the temperature of the vinegar, assuming that all other variables are held constant.