In this activity (page 18 of PDF), learners will measure the volume of impact craters created by projectiles of different masses. They will also draw connections between the mass of the projectile and the volume of crater it creates. This lesson also includes extension activities: Analyzing the formula for the volume of sphere (p46-50), and calculating the volume of a crater (p32-35). The Moon Math: Craters! guide follows a 5E approach, applying concepts of geometry, modeling, data analysis to the NASA lunar spacecraft mission, LCROSS.