Abstract Taking making weather bottles as the core of the project and integrating with the unit knowledge of solution. Through a series of activities such as understanding the weather bottles, revealing the mystery of crystal change and making weather bottles, learn to understand the composition, solubility and scientific quantitative experimental design method of solution from multiple angles. The microcosmic nature of solution formation process is the difficulty of students’ learning. Multiple conductivity meters are used to measure the change of ion concentration at different positions to form the dissolution process curve of potassium nitrate. By analyzing the change of curve data, a bridge between macro identification and micro analysis is well built to help students break through the learning difficulty. In the process of solving this complex and comprehensive practical problem, students can effectively develop the core qualities of chemistry disciplines such as macro identification, concept changing, evidence reasoning, scientific exploration and innovative spirit. Besides, students can develop scientific values.
ZHANG Xin. Project Teaching of “Solution” in Junior High School Chemistry: Making Weather Bottles[J]. Chinese Journal of Chemical Education, 2022, 43(9): 17-24.
