“昼夜是由于地球自转形成的”这一科学论断,对小学生来说是很费解的,如果让他们从模拟实验中直接观察到太阳周日视运动现象,对突破教学难点无疑是会有帮助的。兹将实验所需“器材”、实验要点和方法分述如下: 实验由全班同学参加。各自站 “The day and night are due to the formation of the Earth's rotation,” a scientific assertion that is very puzzling for primary school students. If we allow them to observe the solar weekday movement directly from simulated experiments, it will undoubtedly help to break the difficult teaching point . The experiment will be “equipment”, experimental points and methods are as follows: The experiment by the class to participate. Their own station