Question

2.2.4 quiz: transfer of thermal energy
question 1 of 10
a class is performing an experiment to keep an ice cube solid as long as possible.
which students actions could be a source of error in this experiment?
a. carey repeated the experiment every half hour and forgot to reseal the container she put the ice cube in.
b. maria checked her ice cube every hour and forgot to reseal the container she put the ice cube in.
c. jody used a different experimental design than carlos used.
d. jerrie measured the ice cube before it started to melt.

Explanation:

In an experiment to keep an ice - cube solid, using a different experimental design than others (Jody) can introduce variability and be a source of error. Carey repeating the experiment regularly and Maria checking the ice - cube are normal procedures. Jerrie measuring the ice - cube before it starts to melt is also a proper step.

Answer:

C. Jody used a different experimental design than Carlos used.