Fruits.jpgAs I was in the grocery store the other day, I walked through the produce isle. My “science gear” kicked in. I looked at the different fruits and began thinking of density. Density compares the volume of an object with its mass. (Many more dense objects that are the same size as less dense objects tend to sink more in water.) My state science core requires students learn to calculate density. The formula for density is mass divided by volume.



Mass is easily measured on a balance scale or electronic scale. One method to determine volume is length x width x height. This method works well for a cube. The volume of an irregular shaped fruit cannot be calculated in this manner. Placing an irregular shaped object into water within a graduated cylinder will cause the water to rise (like when you get into a bathtub.) The increase in volume in the graduated cylinder is equal to the volume of the object. I hope to develop an activity for students to allow them the opportunity to calculate and compare the densities of different fruits.


As I consider how to develop this activity, I want input from Intel Engage community members. Would you please take time to respond to one or more of these questions to help me?

  • Which fruit would you want to calculate the density of?
  • Do you recommend having student peel their fruits before measuring (e.g. bananas, melons, etc.)
  • What data might students collect besides mass and volume? (I’d like ideas to extend this beyond just the idea of density.)
  • How might this activity be extended to another subject?
  • How could technology be added into this activity?