The students learned about surface tension this week. They made predictions as to how many drops of water could fit on top of a penny. They tested their predictions and were surprised to find out the results. Water formed a dome on top of the penny and they were able to put a lot more drops then they thought. Some students had as many as 29 drops! This property of water is called surface tension. Next, the students tested this property using salty and soapy water. They were able to see how salty water did not change surface tension, but the soapy water reduces the surface tension by breaking the dome of water.
