Question

Josh was testing his hypothesis on increasing the rate of reaction in a chemical reaction. Josh had two trials, one at room temperature and one using a hot water bath. He compared the data from his two trials and reached a conclusion. What was the major flaw in Josh's experimental design?

Answer 1

The correct answer will be- the replication of the experiment or no trials.

Step-by-step explanation:

A scientific experiment is performed to test the predicted hypothesis which represents the limited explanation of the natural phenomenon.

The scientific results are based on the sample size which should be large enough to reduce the rate of error and justify the results which could support the hypothesis.

Since in the given experiment, the trials of the experiment were few with no replicas therefore, it could cause problem while analyzing the results and will cause an error in the data.

Thus, the replication of the experiment or no trials is the correct answer.

Answer 2

The number of trials.

Step-by-step explanation:

Remember that in an experiment you need two variables, the one that you are going to change (manipulated) and the one that you are going to measure and observe (independent). So does not matter how many variations you are going to select, you need to repeat the experiment at leas three tines to observe the mistake.