七年级地理上册1.1《地球和地球仪》课件3中图版.ppt

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1、总结归纳经纬线的特点,总结归纳经纬度的特点。,第一章第一节 地球和地球仪(3),学习目标 1.认识经纬网,并能在地球上确定某个地点的经纬度。2.了解五带划分的界线和范围。,自主学习一认识经纬网 阅读课本第10页的内容,结合图L,回答下列问题1.什么是经纬网?2.经纬网有什么作用?3.怎样确定某个点的经纬度?,二、自主学习,交流展示,利用经纬网可以,辨别地表事物的 方向,确定地表事物的 位置,经纬网的作用,思考:如何利用经纬网定位?,针对练习 .下图经纬网中M地的地理位置是( )A.10S,170E B.10S, 170W C.10N, 170W D.10N, 170E,170,170,10,1

2、0,M,180,0,30S,30N,60N,60S,120W,180,120E,60E,60W,写出下列点的经纬度。 A点( ) B点( ) E点( ),D,A,B,C,E,0,30S,30N,60N,60S,120W,180,120E,60E,60W,A(30N ,60W)B(30S ,60E)E(0 , 180),D,A,B,C,E,自主学二地球上的五带 阅读课本第11页的内容,结合图M,回答下列问题1.五带是根据什么划分的?2.认识五带的名称,划分界线和范围?,二、自主学习,交流展示,五带的划分,地球上纬度不同的地方,接收到太阳热量有多有少,根据太阳热量在地表的分布状况,形成了不同的温度带,人们将其划分为五带。,五带的形成,寒带风光(终年严寒),寒带风光,温带风光(四季分明),热带风光(终年炎热),热带风光,针对训练:写出数字对应的五带名称及分界线,三、课堂小结 回扣目标(2分钟),四、达标检测 当堂反馈(7分钟),检测指导: 1、闭卷检测,独立完成(3分钟) 2、出示答案,自主纠错(1分钟) 3、质疑解惑,互帮互学(2分钟) 4、小组汇报,师生点拨(1分钟),

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