we started the class with the erupting volcano in the playground then came into the classroom to create one to take home. Using the wider mouthed bottle was great but the narrow mouthed bottle was so much more popular shooting the solution high into the air.We used 8oz water bottles, quart yougurt containers and homemade clay with paper. At first it was a little hard to get the clay and paper to stick but then we hit on the method and the results were well worth it.
For the eruption:
half a bottle warm water
2Tbs baking soda
6-8 drops dishwashing soap
few drops food color (optional)
then add:
1/2 cup vinegar and jump back
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