select the correct answer. neville is testing...
select the correct answer. neville is testing a hypothesis through experimentation. he believes that raising the temperature difference between two water samples will lead to stronger circular currents when the samples are mixed together. which of these actions would be considered a mistake in nevilles experiment? a. he measures the strength of each current using the same flow meter. b. he randomly varies the volume of hot and cold water across his trials. c. he reruns the experiment after fixing calibration problems with his thermometers. d. he uses glass containers to hold the water samples instead of plastic ones. e. he states his hypothesis prior to beginning any of his experimental trials.
Answer
# Brief Explanations:
In a scientific experiment, variables other than the independent variable (temperature difference here) should be kept constant. Randomly varying the volume of hot and cold water across trials means the volume becomes an uncontrolled variable, which can affect the results and introduce error. Measuring with the same flow - meter, rerunning after fixing calibration, using glass containers, and stating the hypothesis first are all good experimental practices.
# Answer:
B. He randomly varies the volume of hot and cold water across his trials.