Question

the passage below describes an experiment. mitchell wanted to make cheese from milk curds. he knew that milk forms curds when it is heated, and he heard that adding vinegar could help. he wanted to know whether adding different amounts of vinegar would affect the size of the curds. mitchell poured the same amount of milk into each of three pots. he added one - half cup of vinegar to one pot, one - fourth cup of vinegar to another pot, and nothing to the final pot. mitchell heated each pot for twenty minutes. then he observed how large the curds were in each pot. he repeated this process three times. in this experiment, the pot with one - half cup of vinegar added to milk was part of _. an experimental group a control group

Explanation:

In an experiment, the experimental group receives the variable being tested. Here, the variable is vinegar amount. The pot with one - half cup of vinegar has the variable applied, so it's in the experimental group. The control group has no variable change (the pot with no vinegar).

Answer:

an experimental group