Klutz-Proof Density Column

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Making liquids of different densities to perfectly lay on top of each other can be a frustrating exercise. The Exploratorium created this activity as a fool proof way of making a density column.

Quick Guide

Preparation Time:
5 to 10 minutes
Learning Time:
5 to 10 minutes
Estimated Materials Cost:
1 cent - $1 per student
Age Range:
Ages 6 - 18
Resource Type:
Activity
Language:
English

Materials List (per student)

  • Water
  • Vegetable oil
  • Isopropyl alcohol (70% or 91%)
  • Non-iodized or kosher salt
  • Empty, clear bottle with cap or lid—smooth-walled bottles work best
  • Food coloring

Keywords

Subjects

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

Other

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Access Rights:

  • Free access

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