Launch Interactive Share to Google Classroom As you take a deep sniff, the odor particles in the air flow back to the top of your nose. Learn more about the sense of smell in the simulation. Grades: 3 4 5 6 7 8 9 10 11 12 Subjects: ScienceLife ScienceCells as a System Collection: InteractivesActivitiesSimulations Series: NASA OnlineNASA Science Simulations