Question

of Semester Test
ect the correct answer.
wille is testing a hypothesis through experimentation. He believes that raising the temperature difference between two water samples will lead to
onger circular currents when the samples are mixed together. Which of these actions
would be considered a mistake in Neville's experiment?
A.
He measures the strength of each current using the same flow meter.
ов.
He randomly varies the volume of hot and cold water across his trials.
O 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.
He states his hypothesis prior to beginning any of his experimental trials.
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Answer 1

In Neville's experiment, if he uses glass containers to hold the water samples instead of plastic ones, that would be considered a mistake. This is because the choice of material for the containers can impact the temperature retention properties and may affect the results of the experiment. Glass containers could potentially absorb or release heat differently compared to plastic containers, leading to a variable that was not accounted for in the hypothesis testing. This could introduce an unintended bias into the results and compromise the validity of the experiment. It is crucial in experiments like this to control all variables as much as possible to ensure that any observed effects are truly due to the manipulated factor (temperature difference in this case) and not influenced by other external factors such as the material of the containers. Therefore, using glass containers when the hypothesis was based on specific conditions with plastic containers would introduce a confounding variable, making it challenging to draw accurate conclusions about the relationship between temperature difference and the length of circular currents.