Question

philip 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. philip poured the same amount of milk into each of three pots. he added 1/4 cup of vinegar to one pot, 1/2 cup of vinegar to another pot, and nothing to the final pot. philip heated each pot for 20 minutes. then, he observed how large the curds were in each pot. he repeated this process three times. complete the sentence. in this experiment, the pots with only milk were part of a control group an experimental group

Explanation:

In an experiment, the control group is the one that does not receive the treatment (in this case, adding vinegar). The pots with only milk are not getting the variable (vinegar) being tested, so they serve as a baseline for comparison.

Answer:

a control group