Leo and Nidia use a balance scale to find the mass of each "meteorite" used in the activity.	Susan and Luis use a ruler to find the diameter of their "meteorites."
Alma smooths out the flour to make a flat surface for the "meteorites" to impact.	Chris and Glafiro number each of their "meteorites" so they can tell one from another.
Karla and Rossi are using a ruler to find the diameter of each "meteorite."	Juan, Michael, and Ruby use a balance scale to find the mass of each rock.