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二年级科学下册磁铁2《磁铁怎样吸引物体》课件教科版.ppt

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磁铁怎样吸引物体,聚焦：怎样让这个小车动起来？,探 索,探 索,拉力使小车运动,探 索,推力使小车运动,探 索,不接触小车，能让它动起来吗？,风力使小车运动,磁力使小车运动,探 索,隔着这些物体，磁铁能让小车动起来吗？,研 讨,1.不接触小车，磁铁为什么能让小车动起来？,2.磁铁能隔着物体吸引小车吗？,

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