Density, proportional reasoning, and misconceptions

It's a simple question: what is the relationship between mass and volume?DensitySome students immeadiately said, "Density!" So, I asked them to describe density in terms of particles, and they couldn't.There was a whole day of collecting data. A bunch of plastic blocks, mass on a triple-beam balance and cubic centimeters. Aha! As the volume increases, … Continue reading Density, proportional reasoning, and misconceptions