Water Science in First Grade


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Recently students in first grade explored the property of surface tension. They had been covering a unit on the physical properties of matter and understanding the importance of earth materials.  They counted how many drops of water they could get on a penny before it overflowed.  They repeated the experiment at least three times and then did the same with soapy water. As a class they combined and analyzed their data.  They ruled out any extreme numbers, concluding they must be invalid.  They then noticed the overall relationship.  They had much fewer soapy water drops on the penny before it overflowed compared to plain water.   They then discussed how soapy water reduced the cohesion, or stickiness of water. he students were very engaged and enjoyed learning proper lab technique.


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