Say Cheese!

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Create a chemical reaction that makes cheese! This hands-on activity demonstrates that molecules and atoms are tiny particles that make up everything around us. In this experiment, milk molecules mix with the loose hydrogen atoms in the acid to create a chemical reaction. The molecules in the milk (casein) have a negative charge. The loose hydrogen atoms in the acid have a positive charge. Opposite charges attract, so the casein molecules and loose hydrogen atoms group together and make clumps that you can see (and then eat). [Activity is publicly available through a web crawler capture on Activity write-up only, images are unavailable.]

Quick Guide

Preparation Time:
5 to 10 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
$1 - $5 per student

Age Range:
Ages 4 - 14

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per student)

  • 1/4 cup Whole Milk
  • vinegar
  • Coffee filter
  • Small jar with lid
  • small container


  • Physical Sciences
    • Chemistry
      • Chemical Reactions
      • Acids and Bases
    • States of Matter
      • Solids
      • Liquids
      • Changes of Phase

Informal Categories

  • Food and Cooking


To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


Access Rights:

  • Free access


Source Collection

  • TryScience