Flubber

ACTIVITY HEADER

Name of Activity Flubber
Author Laura Fradin
Keywords goo, fun, chemical engineering, borax, glue
Subject Non-LEGO
Grade Level K, 1, 2, 3, 4, 5
Time 1 Hour Total
Brief Description This will take less than an hour, but is a fun way to introduce chemical engineering by making goo that the kids can take home.
Lesson Objectives: -introduce students to the concept of chemical engineering
-explore how different ratios of chemicals/ingredients produce different results
Materials Needed: -water
-borax
-elmer’s glue
-food coloring (optional)
Preparation and Set Up: Have 2 different containers for mixing the ingredients.
Necessary Background None
Procedure How Flubber is actually made: 1) Mix 3/4 cup of the water with 1 cup glue in a bowl. Stir this mixture until it is thoroughly mixed together. Set it aside. 2) Mix 2 tablespoons of Borax with a 1/2 cup of water in a separate bowl. Mix thoroughly until all of the Borax is dissolved. 3) Combine the two mixtures. Stir them together. Add several drops of food coloring until the mixture is the color you want it to be. 4)Continue stirring until it is one mass of goo. See extensions to see how this activity can be more independent for students and take a full class period.
Extensions: This activity can be done as a demonstration in front of the whole class, allowing students to come do different parts of the reaction/procedure.

However, this activity can be done by giving the students a certain amount of each material and have them work in pairs to try and create something that is the consistency of flubber. This will take almost a whole class period! Each group should have a different mixture and they can learn the effects of using various proportions/ratios of each ingredient. After each group has experimented and they have discussed what happened when they mixed various proportions, you can make flubber as a whole class using the procedure outlines above.

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