二年级科学上册2.6做一顶帽子课件教科版.ppt

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做一顶帽子,说一说,他们有什么共同点?,说一说,这些帽子都有什么用途?,说一说,它们的用途为什么不一样?,材料不一样,说一说,是什么材料?各有什么特性?,橡胶(塑料),彩色卡纸,棉,塑料,布料,设 计,做一顶什么功能的帽子?,选材料,用哪几种材料?,量一量,做多大的帽子?,画简图,怎样让小伙伴看懂你的想法?,做一做,选材料,有问题求助老师,设计,帽子超市,售货员:,我们的帽子有_的功能,它主要由_材料制作的,因为这种材料有_的特性。我们的帽子还有很多优点,比如_。,顾客:,我想购买_帽子,因为这顶帽子_。,研 讨,我们做的帽子是否满足了设计时预想的功能?,还有哪些不足?我们可以怎样改进?,

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