群馬高専における出前セミナーの取り組みについて

概要

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We report how experimental-type lectures for the local community are carried out in Gunma National College ofTechnology. While ordinary lectures for the local community have been held since 2002, we started the experimental-typelectures in 2004. In this paper, three experimental-type lectures for elementary schoolchildren are reported. The first themeis liquid nitrogen. Fruit and flowers can be frozen by the liquid nitrogen immediately because the temperature of the liquidis very low (ca. −200°C). An electric battery is the second theme. We let primary schoolchildren make the battery withfruit and charcoal. The familiar battery can turn a propeller. The third theme is Air-activated disposable hand warmers.They contain cellulose, iron, water, activated carbon, vermiculite and salt. In order to check the principle, the activatedcarbon, sodium chloride solution and iron powder were mixed. Immediately, the temperature of mixture increased andreached at ca. 80°C.
2012-03-00