Invention of a Cloud, Fog, Dew & Frost Generator for Demonstration Use

Abstract

In traditional school science experiments, the apparatus for generating a cloud is one thing, and the apparatus for genrating a fog is another. Therefore, students were apt to get the wrong idea that cloud and fog are generated from different materials. With the conventional apparatus, students found it difficult to understand the principle of generating cloud and fog. To solve these problems, the author has devised the cloud & fog generator, which serves as both a cloud generator and a fog generator. In this apparatus, when the cloud and the fog are generated, the change in temperature and pressure canbe measured by computer, and the students can watch them simultaneously on the screen. Therefore, it is easy to understand the conditions of producing cloud and fog. Moreover, this apparatus was subseguently being improved so that the students can also observe dew and frost. The author gave ademonstration of this apparatus to college students in the course of science education. This apparatus aroused considerable interest and attention with the students. The results of survey by questionnaire show that the students rake this apparatus highly.