二年级科学上册2.1我们生活的世界课件教科版.ppt

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我们生活的世界,自然世界,人工世界,木头是一种材料。,我们生活的世界里还有哪些物品?它们都是用什么材料做成的?,你能给它们分类吗?,1按材料分类,相同材料的分为一类。2把同一类材料的物品序号写在圆圈里。3无法确定的物品序号写在“其他”里。,分类要求:,提醒:听到音乐响起时,整理材料,准备发言。,金属,塑料,玻璃,橡胶,纤维,木头,陶瓷,其他,我们来交流,木头的特性,黄色 有条纹 能浮在水上 ,每一种材料有什么特性呢?,有些物品是由塑料、金属、木头、陶瓷、玻璃、纤维、橡胶等单一材料做成的。,有些物品是由两种或两种以上的材料做成的。,我们的发现,

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