18.金属的性质及用途.ppt

18 金属的性质及用途 ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg ggggggggggggggggggggggg ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg 五年级科学下册 铜矿石 铁矿石 青铜器 编钟 铁制成的兵器 金属的冶炼 铁板 铜柱 铝柱 18 金属的性质及用途 ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg ggggggggggggggggggggggg ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg 冀教版 五年级科学下册 1 具有金属光泽 2 具有导电性 3 具有传热性 金属的性质 1 具有金属光泽 2 具有导电性 3 具有传热性 4 具有柔韧性 或延展性 金属的性质 利用金属的性质说一说金属的用途 讨论交流 金属的应用 1 利用铜良好的导电性可以制作电线电缆 利用黄金 白银的延展性可以制成各种首饰 项链 耳环 戒指 利用钨的熔点高 高温下不反应 化学的稳定性可以制成灯丝 利用铁良好的传热性制成铁锅 铁铲一般装上木柄 防止烫伤 利用铁良好的延展性 制成铁丝和铁片 6 利用铜良好的导电性可以制作电线电缆 利用黄金 白银的延展性可以制成各种首饰 项链 耳环 戒指 利用铁良好的传热性制成铁锅 铁铲一般装上木柄 防止烫伤 利用钨的熔点高 高温下不反应 化学的稳定性可以制成灯丝 利用铁良好的延展性 制成铁丝和铁片 18 金属的性质及用途 ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg ggggggggggggggggggggggg ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg ggggggggggggggggggggggggggggggggggggggg