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目的:1.通过操作,感知物体膨胀的现象,初步了解物体膨胀的条件。2.学会比较观察的方法。准备:1.用水浸泡过的黄豆。2.电炒锅、小冰箱(内装冷冻过的瓶装水、鸡蛋和铝罐饮料)。3.黄豆、麦秆、虾片、玉米若干。4.瘪的乒乓球、木耳(或香菇、茶叶)、透明容器若干。
Objectives: 1. Through the operation, sensing the phenomenon of object expansion, preliminary understanding of the object expansion conditions. 2. Learn to observe the method. Preparation: 1. Soybean soaked in water. 2. Electric wok, small refrigerator (containing frozen bottled water, eggs and aluminum cans drinks). 3 soybeans, straw, shrimp, corn a number. 4. Deflated table tennis, fungus (or mushrooms, tea), a number of transparent containers.