Answer: Please find the answers in the explanation
Step-by-step explanation:
From the given description, when Joe noticed that the cake had not risen, he guessed that the baking powder he had used was too old.
Hypothesis is one of the scientific methods which means guessing.
What is Joe's hypothesis?
Joe's hypothesis is that the baking power used was not effective to make the cake rise believing that it was too old.
After Joe prepared two cakes, one using the same ingredients as his first cake and one using fresh baking powder. After preheating the oven to 350°F, he placed both cakes in the oven for 30 minutes. After 30 minutes, he removed both cakes and noticed that neither one had risen. He decided that the baking powder wasn’t the cause of his problem.
What is Joe's conclusion?
The conclusion is that the inability for the cake to rise wasn't as a result of ineffectiveness of the baking powder used.
What did Joe’s observe?
Joe observed that the cake had not risen.
What was the independent variable in Joe’s experiment?
The independent variable determines the dependent variable.
The independent variable is therefore, the different types of baking powder used.
What was the dependent variable in Joe’s experiment?
The dependent variable is the volume of the cakes.
What was the control in Joe’s experiment?
Joe was able to control the time and the temperature.
What were the constants in Joe’s experiment (assuming he did it correctly)?
The constant were the quantities of the cake ingredient, time used, and the temperature
8. Based on his conclusion, what should Joe do next?
Joe can try another ingredient like yeast or reconsider the ratio of the baking powder to the flour.