By the end of fourth grade, students will develop an understanding of systems, order, and organization. Students will color and identify parts of the heart and each part's function. Students will discuss ways to keep your circulatory system and body healthy. Students use scientific methods to determine how their smell threshold varies using different concentrations of mint extract. Students prepare five solutions of mint extract and then determine when the solution's odor can first be detected.
Water serves as the control solution.
Students should find that their smell thresholds vary. Students will complete Lab Manual pages 71-72 as they do this activity.