Got Gas?

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Create gas with a glass of water, some wire, conductors and a battery! You will be separating water (H2O) into oxygen and hydrogen. This hands-on experiment explores the process of electrolysis, and shows how graphite in a pencil works as an electrical conductor. [Activity is publicly available through a web crawler capture on Activity write-up only, images are unavailable.]

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
$5 - $10 per student

Age Range:
Ages 8 - 18

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per student)

  • Two pencils (your every day HB pencil will work but #2's will work better)
  • Two pieces of electrical wire about 30cm each
  • A glass jar (approx. 500ml)
  • A square piece of cardboard large enough to cover the mouth of the jar
  • Tape
  • Water
  • A lantern battery
  • Salt
  • red cabbage juice


  • Physical Sciences
    • Electricity and Magnetism
      • Electric Charges and Currents
      • Electric Circuits
    • States of Matter
      • Gases
      • Changes of Phase

Informal Categories

  • Electronics


To use this activity, learners need to:

  • see
  • see color
  • touch

Learning styles supported:

  • Uses STEM to solve real-world problems
  • Involves hands-on or lab activities


Access Rights:

  • Free access


Source Collection

  • TryScience