七年级地理上册3.2气温的变化与分布导学案1(无答案)(新版)新人教版.doc

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1、1气温的变化与分布【学习目标】1.知道气温的含义及测定方法,初步学会计算日、月、年平均温度及年较差的方法。2.能够利用气温资料,绘制气温曲线图,并根据气温曲线图说明某地气温日变化、月变化与年变化的规律。【学习内容】结合教材,知道气温的含义及测定方法,初步学会计算日、月、年平均温度及年较差的方法。【预习检测】选择题1.关于等温线图的判读,不正确的是( )A.若等温线和纬线、海岸线或等高线大致平行,说明气温受纬度位置、海陆或地形影响明显B.一般地说,等温线较平直,反映影响气温的因素较单一C.等温线的稀疏和密集不能说明温差大小D.等温线向低纬方向突出时,说明突出地区的气温低于同纬度相邻地区2.气温分

2、布的一般规律是( )A.低纬度气温高,高纬度气温低 B.低纬度气温低,高纬度气温高C.中纬度气温高 D.各地气温高低与纬度没有关系3.关于世界气温的分布规律的叙述,正确的有( )A.气温从低纬向两极逐渐降低B.北半球同纬度的海洋和陆地气温没有差异C.南半球由于海洋面积广阔,气温受海陆地分布影响小,等温线大致与经线平行D.气温的高低除受纬度位置、海陆位置影响外,不受其它因素的影响4.一年中的最高月平均气温与最低月平均气温的差,叫做( )A.气温日较差 B.气温月较差C.气温年较差 D.气温季较差5.下列对世界年平均气温分布的说法,正确的是( )A.最高气温在热带海洋上B.最高气温在热带岛屿上C.

3、最高气温在 23.5N 附近的撒哈拉地区D.同纬度的陆地、海洋气温一样【课堂探究】1. 气温的时间变化22. 绘制气温年变化曲线图1绘出横坐标,把它平均分成 12 段,分别表示 112 月,从左向右标上月份; 2绘出纵坐标,根据最高气温和最低气温的数值,确定纵坐标的取值范围为2525,以 5为单位刻度平分纵坐标;3在坐标图的相应位置,逐月用点标出气温值;4用平滑的曲线把各点连接起来。【随堂检测】单项选择1对气温的观测,通常一天要进行 4 次,4 次气温观测时间各部相同如图所示是某观测结果,最有可能是下列哪个时间的观察结果( ) A2 时 B8 时 C14 时 D20 时2读下图,判断下列说法正

4、确的是( ) A该图是气温年变化图 B该图是气温日变化图 C最高气温出现在中午 12 时 D气温年较差大约是 7 3. 关于世界气温分布的叙述,正确的是( )A从低纬度向高纬度逐渐降低 B气温从南向北逐渐降低C纬度越高气温越高 D同纬度夏季海洋气温比陆地高 4.下列有关气温说法不正确的是( )A一天中,最高气温在午后 2 时左右出现B 等温线分布图上,等温线稀疏的地区气温差异大3C山地和丘陵,气温随海拔升高而降低D随着纬度位置升高气温逐渐降低 5.下列对图中信息的叙述正确的是( )A是南半球 7 月等温线B是南半球 1 月等温线C是北半球 7 月等温线D是北半球 1 月等温线 4参考答案【预习检测】CAACC【随堂检测】CBABB

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