Mrs. Bradley's Grade 2
This week we did 2 experiments to learn about surface tension. One had us adding glass beads to a petri dish to watch the bulge of water grow. The other had us slowly and carefully dropping water onto a penny to see how many drops of water a penny could hold. Dripping water droplets onto a penny proved to be trickier than it looked. We had to be slow and careful or our water spilled right over the edge. However, our hard work paid off when large bulges of water formed on the pennies. We learned that the molecules on the surface of water create a thin layer, like plastic wrap, which is why we saw the big water bulge on our pennies.
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AuthorMrs. Bradley's class is made up of 24 students from Dr. Roberta Bondar School. Archives
June 2018
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