The correct answer to this question is A, Number of times gum is chewed. A controlled variable is also known as a scientific constant. This variable is something in a scientific experiment which says the same and doesn't change throughout the process.
Throughout the experiment, there are different brands used. As a result, the size of the bubble varies as well. Throughout the five brands of gum, the only constant is the number of times the gum is chewed. Continuous variables have no significance to the person experimenting, but they can influence and have an impact on the results.
W. Wright, Biology student, Biology student, Astoria
Answered Apr 19, 2019
The answer to this is A. It will be hard to control the size of the bubble gum that will be formed. This will sometimes depend on the brand of the bubble gum that you will choose as there are some that will blow better bubbles as compared to others.
The brand of the bubble gum needs to be all different in order to determine what brand can provide the best bubble. The only thing that can be controlled based on the given choices is the number of times that the gum can be chewed. There are some types of gum that cannot be blown properly when they are barely chewed.