You will need:
- 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 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
Get the Unit of Work on Heat Energy here!
- What actually is heat?
- How does heat move through different materials?
- How does heat change the properties of materials and more!
Includes cross-curricular teaching ideas, student quizzes, a sample marking rubric, scope & sequences & more
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 of the 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
- Try different types of soap
- Vary the strength of the microwave setting
From liquid nitrogen shows to hot & cold workshops, we’ve got your unit on properties of materials covered!
Get in touch with FizzicsEd to find out how we can work with your class.
Properties of Materials
Years 1 to 6
Maximum 30 students
Workshop (NSW & VIC)
60 or 90 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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