I only need help with the Constants, please answer as much as you can

Part 1 Directions: Identify the independent variable, the dependent variable and two or more constants in the following descriptions of experiments:

(Constants = Controls or controlled variables)

1) The more time people spend using social media, the less they read books.

Independent Variable: Time people spend using social media
Dependent Variable: The amount of books read
Identify 2 Constants:

2) Drinking energy drinks makes people more aggressive.

Independent Variable: Drinking energy drinks
Dependent Variable: Being aggressive
Identify 2 Constants:

3) Taking a nap in the afternoon makes people more focused for the rest of the day.

Independent Variable: Napping during the afternoon
Dependent Variable: Their focus for the rest of the day
Identify 2 Constants:

4) Spending time with a family dog decreases the amount of stress someone is feeling.

Independent Variable: Spending time with a family dog
Dependent Variable: How much stress someone is feeling
Identify 2 Constants:

5) Eating breakfast in the morning increases the ability to learn in school.

Independent Variable: Eating breakfast in the morning
Dependent Variable: Ability to learn in school
Identify 2 Constants:

Part 2 Directions: Identify the independent variable, the dependent variable and two or more constants in the following descriptions of experiments:

1) Students watched a cartoon either alone or with others and then rated how funny they found the cartoon to be.

Independent Variable: Watching cartoons either alone or with others
Dependent Variable: How funny the cartoon is to them
Identify 2 Constants:

2) A comprehension test was given to students after they had studied textbook material either in silence or with the television turned on.

Independent Variable: Studies textbook material in silence or with TV on
Dependent Variable: Comprehension test results
Identify 2 Constants:

3) Some elementary school teachers were told that a child’s parents were college graduates, and other teachers were told that the child’s parents had not finished high school; they then rated the child’s grades.

Independent Variable: Whether the child’s parent went to college or if they finished high school
Dependent Variable: The children’s grades
Identify 2 Constants:

4) Workers at a company were assigned to one of two conditions: One group completed a stress management training program; another group of workers did not participate in the training. The number of sick days taken by these workers was examined for the next 2 months.

Independent Variable: Group training
Dependent Variable: Number of sick days taken
Identify 2 Constants:

5) Students at a University were split into two groups and each received a different text for a philosophy course. One group received a traditional textbook, while the other received an interactive textbook on a tablet computer. After the course, the final exam grades between the two groups of students were compared.

Independent Variable: Type of textbook received, traditional/interactive
Dependent Variable: Grades on the final exam
Identify 2 Constants:

1. The same people(subject) and the type of social media
2. The kind of energy drink and the same subject
3. The same place they napped and the same people who napped.
4. The same dog and the same subject
5. What you eat for breakfast and the school you go to
PART 2:
1. Same cartoon and same subject(s)
2. The same textbook material and test
3. Same child and the same child’s parents
4. The amount of time the one group completed the program and how long they will be examined for
5. The same University and the same test
Really hope this helps! A constant is something that never changes, it will stay the same. Since you can only change one variable at a time. If you did more than one, then you would not be able to compare and see a change in the results.