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亲爱的同学,通过对《物态变化》这章内容的学习．你了解了常见的三种物质状态,即固态、液态和气态,认识到六种物态变化,即熔化、凝固、汽化、液化、升华和凝华．掌握了当物态发生变化时的热传递规律,通过本章内容的学习,你还明白了“云”、“雨”、“露”、“雾”、“雪”、“霜”以及“冰雹”的形成。都是很有代表性的物态变化过程．知道在科学技术飞速发展的今天。“呼风唤雨”已经不是神话．“人工增雨”为农业抗旱、森林灭火、生态建设等作出了重要贡献,极大地缓解了日益紧张的水
Dear classmates, through the study of the contents of “The Change of State”. You understand the three common material states, namely, solid, liquid, and gaseous states, and recognize six changes in state, namely, melting, solidification, vaporization, liquefaction, sublimation, and desublimation. Understand the heat transfer law when the state of matter changes. Through the study of the contents of this chapter, you also understand the “cloud”, “rain”, “lu”, “fog”, “snow”, “frost” and “hail” Formation. Are very representative of the state of change process. Know today in the rapid development of science and technology. “Calling for Rain” is no longer a myth. “Artificial Rain Enhancement” has made important contributions to agricultural drought fighting, forest firefighting, ecological construction, etc., which has greatly relieved the growing tension in water.