Lifelong Learning Programme

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Title of the Experience
The primary tastes
Country where it took place
School typology
Lower Secondary School
Thematic Area
Experience typology
Type of contact
Description of the Experience
For teaching students the perception limits of the four basic tastes, I have made water solutions with sugar, salt, citric acid and caffeine in known concentrations (2,4,6,8 g of sugar; 0,2, 0,4, 0,6, 0,8 g of salt; 0,3, 0,6, 0,9, 1,12 g of citric acid and 0,05, 0,1, 0,15, 0,2 g of caffeine). A total of 16 samples were obtained. One control water solution (only water) was also supplied.
The students each had in front of them 5 glasses. The sugar solutions were poured, in an unknown order. The students had to re-order the glasses according to the intensity of the taste. The same protocol was applied for each of the remaining 3 groups of solutions. The students showed different perception limits, which can increase by exercise.

If applicable, please try to highlight how the chosen solution increased the interest of the student towards science.

The students kept exercising and testing their senses to see at which concentration of sugar, salt, citric acid or caffeine they felt nothing – perception threshold.

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Dissemination Seminar in Florence

31 October 2015 The seminar has been held in ITIS “A. Meucci” one of the schools involved within Goerudio project activities. Its main aim was to promote the results of the project toward a broad sample of stakeholders even overcrossing the number of people directly involved in the production of project outcomes. This purpose has been totally achieved especially thanks to the participation of students and teachers coming from different schools or from other classes instead of those ones directly involved within the project activities.