气温和气温的分布教学课件

第二节气温和气温的分布第二节气温和气温的分布一、气温与生活1.日平均气温

一天中不同时间气温值的平均数一、气温与生活1.日平均气温一天中不同时间气温值气温和气温的分布教学课件二、气温的变化一天中最高气温出现在午后2时左右,最低气温出现在日出前后.气温日较差是最高气温与最低气温的差.1、日变化二、气温的变化一天中最高气温出现在午后2时左右,最低气温出现气温的年变化一年中北半球大陆最高气温7月,海洋8月.最低气温1月,海洋2月.气温年较差是最高月平均气温与最低月平均气温的差气温的年变化一年中北半球大陆最高气温7月,海洋8月.最低气温活动P511.读出最高月平均气温数值及月份.2.读出低高月平均气温数值及月份3.算出该地气温年较差()4.说明该地气温的年变化.22℃

7月

21℃1月气温最低.7月气温最高1℃1月活动P511.读出最高月平均气温数值及月份.22℃7月三、气温的分布气温的分布通常用等温线图来表示气温的水平分布等温线密集地方气温差别大等温线密集地方气温差别大三、气温的分布气温的分布通常用等温线图来表示气温的水平分布气温的分布规律低纬度气温高高纬度气温低夏季陆地气温高,海洋气温低.冬季相反.海拔高气温低(海拔每升100米气温下降0.6℃)气温的分布规律低纬度气温高高纬度气温低P53活动2：

计算山顶的高度是多少１５２０－７２０=８００米８×０.６=4.8℃28.8℃－4.8℃=24℃P53活动2：

计算山顶的高度是多少１５２０－７２０=８００气温和气温的分布教学课件活动P53第1题1.从赤道向两极,气温有什么变化规律?变化的原因是什么?

从赤道向两极气温逐渐递减.变化的原因是太阳辐射从赤道向两极减少活动P53第1题1.从赤道向两极,气温有什么变化分别指出年平均气温高于20和低于－10℃的主要纬度范围.

年平均气温高于20℃主要分布在南北回归线之间年平均气温低于－10

℃主要分布在南北极圈以内分别指出年平均气温高于20和低于－10℃的主要纬度范围.Unit4Iwanttobeanactor.

SectionA(Review)

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aT-shirt.

Iteachmy

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