Make a Milk Rainbow

Before You Start

 

ACTIVE TIME:
10-20 minutes

TOTAL PROJECT TIME:
10-20 minutes

KEY CONCEPTS:
physics, chemistry, liquids, molecules, surface tension

Introduction

 

Have you ever seen a rainbow after a rainfall, or drawn a rainbow for fun? They can be fun to make using colorful markers or other craft supplies. But did you know you can actually make a simple rainbow using milk, liquid detergent (i.e., soap), and food coloring? How the rainbow is created by this mixture might surprise you! In this science activity, you will make your own milk rainbow and explore how detergent and surface tension are involved in its creation.

stem download Make a Milk Rainbow

Credits

 

Teisha Rowland, PhD, Science Buddies

 

This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,150 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.

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