Friday, January 30, 2015

Gobstopper Experiment with Interactive Notebook Ideas

Ready for some Gobstopper Science?


Have students make predictions.  
Fill a petri dish with enough water to cover the bottom.  
Place Gobstoppers in the water against the edge.   
Record observations.
Leave gobstoppers undisturbed for 30 minutes.
Record observations several times during this period.  


The surprise here is that the Gobstopper colors don’t actually mix in the petri dish. Instead, they run into each other and stop. In addition to the non- mixing colors, you’ll notice that the colors change during the dissolving process. This is because each Gobstopper is comprised of four different colors.

Templates for the above circles are available here  Templates for Circles and Wheels

Now that students have seen what the gobstoppers will do in water, let them design their own experiment.   What happens if you use something other than water?   Students will plan the next experiment and make predictions.  Experiments can be carried out the next day.   Students can then make comparisons between the water/gobstopper experiment and the other substance (vegetable oil, sprite, milk, etc.) with gobstoppers.  

Science and Engineering Practices 
Planning and Carrying Out an Investigation
Constructing Explanations

Crosscutting Concepts
Cause and Effect
Stability and Change

Disciplinary Core Ideas
PS1  Matter and Its Interactions

Freebie for you!   Have students color in their observations with the different liquids and the Gobstoppers!

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