長光路セルとしてプラスチックパイプを用いた水の色に関する教材開発－小学校理科における活用－

　Water is an essential substance for living things. Topic on water are at grades 3-6 in elementary science. The roles and functions of water (erosion, accumulation, transportation), germination and growth of plants, etc. On the other hand, the properties of water are not treated except physical change like boiling, evaporation, freezing, etc.
　The color, taste, and smell of water are not discussed in elementary science. This research proposes that the color of water because an excellent theme for inquire based leaning. We have developed a suitable and low cost teaching material for the water color. Furthermore, we have conducted a few lessons with the teaching materials to examine the appropriateness.