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Lesson Plan

Mixtures with a focus on colloids

Mix materials to discover different kinds of mixtures, then focus on colloids.
Science content (2016 curriculum): 
Chemistry: Atoms, Molecules (3-7)
Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6)
  • materials in the activities
  • optional: transmission microscope, slides and coverslips, pipette to look closely at the particles in colloids
Activities in this lesson plan: 

Discover and define differnet kinds of mixtures with the Making Mixtures activity.

Optional: Look at the colloidal particles in milk under the microscope, by making a slide of a milk drop and look at the edges of the liquid where it is thin to see individual fat droplets.

Then make colloids, first with oobleck, then with butter. In butter making, three colloids are made.

Optional: Look at the particles in oobleck by making a slide of oobleck to look at under the microscope. Look at the edges of the material where it is thin to see the individual cornstarch particles.

Grades taught: 
Gr 4
Gr 5
Gr 6
Gretchen Bartlett
Lisa Shideler
Site tested: 
Maple Grove Elementary