The image below shows a write-up of an experiment on heat transfer. What was kept the same towards the END of the experiment to make it a valid test?

To determine what was kept the same towards the end of the experiment to make it a valid test, we typically look for the control variables or conditions that remained constant. These could include factors such as the type of heat source used, the materials being tested, the environment in which the experiment was conducted, and the measurement methods.

In a heat transfer experiment, common control variables may include:

1. Temperature of the environment - Ensuring that external temperature does not influence the results.
2. Duration of heat exposure - Keeping the time constant for each test to compare results accurately.
3. Amount of material - Using the same mass or volume of materials being used to transfer heat.
4. Initial temperature of the materials - Starting at the same temperature before applying heat.

If you have more details about the specific experiment mentioned in the image, please provide that context to give a more precise response.