This resource presents the students with three small activities which are all disguised as challenges. The first activity, "Deactivating the Bomb," requires the students to determine how much hot water to add to a beaker of cool water so that the final temperature rises to 37 degrees Celsius. For every degree that the students miss the final temperature by, they lose a point. The second activity, "How Hot is that Piece of Metal?," challenges the students to devise a method to determine the temperature of a piece of metal without touching it with a thermometer. The third activity, "What's the Specific Heat of my Magical Special Nails?," asks the students to determine the specific heat of a nail. What makes the three activities so great is that they all get to the very core of the Performance Expectation by requiring the students to plan and carry out their own investigations.