Question

read the experiment below then match the variables. smithers thinks that a special juice will increase the productivity of workers. he creates three groups of 50 workers each and assigns each group the same task, to staple sets of papers. group 1 drinks 100ml of the special juice while they work. group 2 drinks 50ml of the special juice while they work. group 3 is not given the special juice while they work. after an hour, smithers counts how many sets of papers each group stapled. independent variable dependent variable constant variable control

Explanation:

The independent variable is what is changed in an experiment. Here, it's the amount of special - juice (100mL, 50mL, 0mL). The dependent variable is what is measured as a result of the change in the independent variable, which is the number of sets of papers stapled. Constant variables are those that are kept the same throughout the experiment, such as the task (stapling papers), the number of workers in each group (50), and the time (1 hour). The control group is the one that doesn't receive the treatment being tested, so Group 3 is the control.

Answer:

Independent Variable: Amount of special juice (100mL, 50mL, 0mL)
Dependent Variable: Number of sets of papers stapled
Constant variable: Task (stapling papers), number of workers (50 per group), time (1 hour)
Control: Group 3 (no special juice)