Teaching materials for investigating how to warm water, and methods for investigating how to warm water using the teaching materials

摘要

PROBLEM TO BE SOLVED: To provide teaching materials capable of investigating how water warms at multiple stages of temperature. SOLUTION: This is a nonionic surfactant aqueous solution that is heated in a transparent container, and is cloudy in a teaching material for investigating how water warms by observing how the nonionic surfactant aqueous solution becomes cloudy due to heating. It is characterized by comprising three or more kinds of nonionic surfactant aqueous solutions having different points. The teaching material preferably includes four types of nonionic surfactant aqueous solutions having cloud points of 30 ° C., 40 ° C., 50 ° C., and 60 ° C. [Selection diagram] Fig. 2