Sixth graders at St. Mary Catholic School were making scientific inquiries recently regarding amoebas. One of the inquiries was why amoeba can’t grow as large as elephants.

To explore the questions, the students created a model of a cell filled with sand to illustrate the concept of surface area-to-volume ratio. Based on the results, the ratio of total surface area to volume decreased as a cell grows larger.

Also, the total surface area-to-mass ratio decreased as a cell grows larger. The students were excited about the results.