Heartburn is a form of indigestion felt as a burning sensation in the chest when stomach acid comes back up into the esophagus. some people take an antacid to relieve heartburn. which best describes the antacid’s effect?

Ateacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and ph indicator strips, which measure acidity. the teacher asks the students to put the liquids in order from most acidic to most basic. what type of investigation could the students conduct to determine the correct order for the liquids?