Answer:
there is no constant.
Explanation:
According to my research on the scientific method, I can say that based on the information provided within the question the main thing wrong with this experiment is that there is no constant. Every experiment needs a constant and a control group to be able to correctly determine the effects of the variables within the experiment. This experiment does not have any constant therefore the results will be invalid.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.