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实验法导入新课的方式有多种,在初中化学教学中主要有以下几种形式。 一、魔术导入法 一言未发,魔术先行。这种开门见山式的导入法最具魅力,易将学生带入“新奇境地”。例如:通过魔术“空杯生烟”引入新课铵盐的《制法》及《化学肥料》。“能生火的纸”导入《自燃和缓慢氧化》。“会变色的水”引入酸碱指示剂等。 魔术法引入新课,应注意在保证现象的情
There are many ways in which the experimental method can be introduced into the new class. There are mainly the following forms in junior chemistry teaching. First, the magic import method is silent, magic first. This door-to-door introduction method is the most attractive, and it is easy to bring students into the “new wonderland.” For example, the introduction of the “Legislative Method” and “Synthetic Fertilizer” for the new ammonium salt in the Magic “Empty cup smoke”. “Fired paper” introduces “spontaneous and slow oxidation.” An “acid-base indicator” and the like are introduced into the “water that changes in color.” The magic law introduces new lessons and attention should be paid to guaranteeing the phenomenon