Students Learn Exothermic and Endothermic Processes

摘要

This article describes a two-part investigation exploring endothermic and exothermic processes. During the first part of the investigation, students determine whether a chemical combination is endothermic or exothermic. During the second part of the lesson, students engineer a device that uses an endothermic combination of chemicals to make homemade ice cream. This investigation ties into the Matter and Its Interactions standard found in the Next Generation Science Standards (MSPS1-6; see NGSS box, p. 43). The performance task related to this concept requires students to design, test, and modify a device that uses either an endothermic or exothermic process.