Density Rainbows

Add to list Go to activity
Activity link broken? See if it's at the internet archive
In this activity, learners explore the concept of density by pouring 5 different liquids into a jar. Food coloring is added if needed to give each liquid a distinct color. Due to the different densities of the liquids, they will settle in separate layers, resulting in a glassed filled with a colorful rainbow. Includes step-by-step instructions (with a recommended pouring order), setup photos, and an explanation of the science behind the activity.

Quick Guide

Preparation Time:
Under 5 minutes
Learning Time:
5 to 10 minutes
Estimated Materials Cost:
$1 - $5 per student
Age Range:
Ages 4 - 14
Resource Types:
Activity, Experiment/Lab Activity
Language:
English

Materials List (per student)

  • 1 pack of food coloring
  • 5 different liquids (Suggested liquids: dish soap, honey, vegetable oil, water, rubbing alcohol; or try whatever you have on hand. Safety note: Do not use harmful chemicals or other cleaning agents besides dish soap.)
  • 5 small cups or containers
  • 1 clear 8-oz cup or glass

Keywords

Subjects

  • Physical Sciences
    • Heat and Thermodynamics
      • Heat and Temperature
    • States of Matter
      • Liquids
    • Structure and Properties of Matter
      • Volume and Density

Informal Categories

  • Arts and Crafts

Other

Components that are part of this resource:

Access Rights:

  • Free access

By:

Source Collection

  • Virtual Science Fair

Rights:

  • All rights reserved, Buffalo Museum of Science, 2021