This article provides instructions, and a list of supplies for a teacher performed class demonstration showing, change of state. Having students engage in technology-based inquiry activities is an excellent way for teachers to introduce topics that are driven by the National Science Education Standards (NRC 1996). Based on Content Standard B, this activity shows middle school students the different characteristic properties of substances. Moreover, by using the TI-73 with a CBL2, students can take accurate measurements and have greater control over their experiments. In addition, the interactive graphs generated by the TI-73/CBL2 help students interpret the results of their experiments and can be used to create professional laboratory reports. Hopefully, this experiment opens the door for teachers to the endless possibilities for the coupling of a TI-73 with a CBL2 in the middle school science classroom.