昼夜长短的变化规律课件

1、第三节,地球运动,昼夜,长短的变化规律,绥德县第一中学,霍海瑞,2014.12.18,1,太阳直射点的位置对,昼夜长短状况,的影响,日期,太阳直射,点得位置,昼夜长短,北半球,南半球,极地地区,北半,球春,分到,秋分,北半,球秋,分到,次年,春分,北半球,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,

2、S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,日期,太阳直射,点得位置,昼夜长短,北半球,南半球,极地地区,北半,球春,分到,秋分,北半球,北半,球秋,分到,次年,春分,昼长夜短,纬度越高,昼越长夜,越短,昼短夜长,纬度越高,昼越短夜,越长,北极周围,有极昼,南极周围,有极夜,南半球,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,2

3、3,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,日期,太阳直射,点得位置,昼夜长短,北半球,南半球,极地地区,北半,球春,分到,秋分,北半球,昼长夜短,纬度越高,昼越长夜,越短,昼短夜长,纬度越高,昼越短夜,越长,北极周围有,极昼，南极,周围有极夜,北半,球秋,分到,次年,春分,南半球,昼短夜长,纬度越高,昼越短夜,越长,昼长夜短,纬度越高,昼越长夜,越短,北极周围,有极夜,南极周围,有极昼,1,

4、太阳直射点所在的半球昼长夜短,纬度越高，昼越长夜越短，另一半球相反,1,太阳直射点的位置对,昼夜长短状况,的影响,练习,今天,12,月,18,号）绥德一中的昼,夜长短状况如何,状况：昼短夜长,日期,太阳直射,点得位置,昼夜长短,北半球,南半球,极地地区,北半球,夏至日,北半球,冬至日,北半球,二分日,23,26,N,N,S,66,34N,23,26N,0,23,26S,66,34S,日期,太阳直射,点得位置,昼夜长短,北半球,南半球,极地地区,北半球,夏至日,23,26,N,北半球,冬至日,北半球,二分日,昼最长,夜最短,昼最短,夜最长,北极圈,及其,以北为极昼,南极圈,及其,以南为极夜,23

5、,26,S,N,S,66,34N,23,26N,0,23,26S,66,34S,日期,太阳直射,点得位置,昼夜长短,北半球,南半球,极地地区,北半球,夏至日,23,26,N,昼最长,夜最短,昼最短,夜最长,北极圈,及其,以北为极昼,南极圈,及其,以南为极夜,北半球,冬至日,23,26,S,北半球,二分日,昼最短,夜最长,昼最长,夜最短,北极圈,及其,以北为极夜,南极圈,及其,以南为极昼,赤道,N,S,66,34N,23,26N,0,23,26S,66,34S,日期,太阳直射,点得位置,昼夜长短,北半球,南半球,极地地区,北半球,夏至日,23,26,N,昼最长,夜最短,昼最短,夜最长,北极圈,及

6、其,以,北为极昼；南,极圈,及其,以南,为极夜,北半球,冬至日,23,26,S,昼最短,夜最长,昼最长,夜最短,北极圈,及其,以,北为极夜；南,极圈,及其,以南,为极昼,北半球,二分日,赤道,昼夜等长,昼夜等长,昼夜等长,N,S,66,34N,23,26N,0,23,26S,66,34S,1,太阳直射点所在的半球昼长夜短,纬度越高，昼越长夜越短，另一半球相反,2,二分日全球昼夜等长，赤道全年昼,夜等长,2,太阳直射点的移动方向对,昼夜长短,变化,的影响,1,太阳直射点的位置对,昼夜长短状况,的影响,问题探究,从夏至秋分冬至，太阳直射,点向哪个方向移，这个过程中南、北,半球的昼夜长短各有怎样的变

7、化,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,问题探究,从夏至秋分冬至，太阳直射,点向哪个方向移，这个过程中南、北,半球的昼夜长短各有怎样的变化,从夏至秋分冬至，太阳直射,点向南移，在这个过程中南半球昼渐,长夜渐短。北半球相反,问题探究,从冬至春分夏至,太阳直射,点向哪个方向移动？这个过程中南,北半球

8、的昼夜长短各有怎样的变化,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,N,S,66,34N,23,26N,0,23,26S,66,34S,问题探究,从冬至春分夏至,太阳直射,点向哪个方向移动？这个过程中南,北半球的昼夜长短各有怎样的变化,从冬至春分夏至，太阳直射,点向北移，在这个过程中北半球昼渐,长夜渐短。南半球相反,1,太阳直射点的位置对,昼夜长短状况,的影响,1,太阳直射点所在的半球昼长夜短,纬度越高，昼越长夜越短，另一半球相反,2,二分日全球昼夜等长，赤道全年昼,夜等长,2,太阳直射点的移动方向对,昼夜长短,变化,的影响,太阳直射点向哪个