You Will Need:
- A microwave
- A microwave-safe bowl.
- Household soap, wet soap works best. So use an old bar of soap from the shower.
Place the bar of soap in a microwave-safe dish and zap it in a microwave on high for between 30-60 seconds.
You may need longer for low power microwaves.
Watch as a foamy mass grows from the soap! (Careful; do not touch until the soap is cool).
School science visits since 2004!
– Curriculum-linked & award-winning incursions.
– Over 40 primary & high school programs to choose from.
– Designed by experienced educators.
– Over 2 million students reached.
– Face to face incursions & online programs available.
– Early learning centre visits too!
Online courses for teachers & parents
– Help students learn how science really works
Why Does This Happen:
The water inside the soap is undergoing a phase change from liquid to water vapour and expanding. The foamy effect comes about from the expansion air bubbles trapped inside the soap. By heating the soap and expanding the water and air inside, you end up with this lovely warm soapy foam.
Variables to test
- Which soap bars work the best?
- Does it matter if you change the power setting of your microwave?
From colour changes to slimy science, we’ve got your kitchen chemistry covered!
Get in touch with FizzicsEd to find out how we can work with your class.
Chemistry Show
Years 3 to 6
Maximum 60 students
Science Show (NSW & VIC)
60 minutes
Online Class Available
STEM Full Day Accelerator - Primary
Designed from real classroom experiences, this modular day helps you create consistently effective science learning that directly address the new curriculum with easily accessible and cost-effective materials.
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