Figure 1. Initial student’s model{Due to ethical reasons, regular teacher of the students participating in our research informed their parents, who gave their consent and authorization of the educational diffusion of the results preserving anonymity of the students.}

From

Chewing Gum and pH Level of the Mouth: A Model-based Inquiry Sequence to Promote Scientific Practices

M Rut Jiménez-Liso, María Martínez-Chico, Esteban Salmerón-Sánchez

World Journal of Chemical Education. 2018, 6(3), 113-116 doi:10.12691/wjce-6-3-2