“塑料直尺不摩擦也会吸纸屑”,你恐怕不会相信这出自一位一年级小朋友口中。 那时在上《摩擦起电》一课中,我曾问同学:你还有哪些办法使这块塑料直尺吸引纸屑呢?学生实验后,纷纷告诉我,把塑料直尺在外套、毛衣、红领巾、皮背心等物体表面上摩擦后,会吸纸屑,可另一位同学的回答令大家震惊,他说:“老师,我 “Plastic rulers do not rub the paper scraps,” and you probably will not believe it came from a first-year kid. At that time in the course of “friction electrification”, I once asked my classmates: what else do you have to make this piece of plastic ruler attract the confetti? After the experiment, students told me that the plastic ruler in the jacket, sweater , Red scarf, leather vest and other objects on the surface of the friction, the paper will be confused, another student can answer everyone shocked, he said: "Teacher, I