August 21

More First Grade Investigations

My first grade scientists used the Scientific Method in two more investigations.

What will happen if you stick a pencil in a Ziploc bag that is filled with water? Most of my scientists thought it would pop. They were surprised when the water stayed inside the bag. Even when we squeezed the bags, no water leaked around the pencils. Why? It’s all about polymers- long chains of molecules.


We added some vegetable oil to a glass of water. Why don’t they mix? My scientists recalled our discussions about density from last year. Then we dropped food coloring in the oil, observed changes, and finally sprinkled salt of top. Wow!




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