观察目的: 1.通过一段时间对月亮的观察,了解月相变化的规律。 2.培养学生连续观察的能力和记录观察结果的能力。 3.激发学生观察的兴趣,培养学生的意志力和对科学执著的态度。 观察难点: 1.观察的时间长,学生容易失去兴趣。 2.学生比较熟悉月亮,因而学生观察月亮的主观努力 Observation purposes: 1. Through a period of observation of the moon to understand the law of the moon phase changes. 2. Develop students' ability to observe continuously and record their observations. 3. Arouse students 'interest in observation, develop students' willpower and attitude toward science. Difficult to observe: 1. The observation of a long time, students tend to lose interest. 2. Students are more familiar with the moon, so students observe the moon's subjective efforts