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二年级科学上册2.2不同材料的餐具课件教科版.ppt

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不同材料的餐具,如何观察四种材料,神秘的盒子,1修改自己的记录单。,2分享自己的发现。,交流对材料的认识,各有什么缺点？,各有什么优点？,课后任务,任务一：你还知道哪些物品可以用不同材料制成？,任务二：你还知道哪些材料可以做成不同物品？,

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