Lesson plan

Foams

Summary
Make meringues. While they are baking find out which molecules in them make the foam, and do other foam activities.
Science content
Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6)
Procedure

A foam is a mixture called a colloid. It is made up of gas bubble suspended in a liquid (or solid).
This lesson makes some foams.

Make meringues.
While baking figure out which molecules in the ingredients made the foam with the foam molecule test (proteins).

Then make other foams and discuss the molecules that make the foam: elephant's toothpaste, then coke and mentos.

Grades taught
Gr 4
Teaching Site
ingridscience afterschool