According to Office Party of mass line education practice activities led group of unified arrangements, units main led to for cadres workers Shang a times party lecture, due to himself level limited, only put this stage concentrated learning of experience today and everyone common with learning exchange, purpose is let we further deep understanding mass line of connotation, insisted party of mass line, do masses work, following main from four a aspects told: a, and full awareness party of mass line education practice activities of major meaning Party's 18 major distinct proposed to focus on the party's advanced nature and purity, in the party, with \c and clean for the people\content of the party's mass line and educational practice. This is comrade XI Jinping as party General Secretary and adhere to strictly administering the party, strengthen the party's major decision is in line with the public expectations and strengthening the construction of learning-oriented service innovation ofMarxist party's major deployment, is the important measure to advance the great cause of socialism with Chinese characteristics. First, carry out the party's mass line in education practice, was carrying 18 of the party spirit, summon a powerful force for realizing the great rejuvenation of the Chinese nation the Chinese dream of urgent needs. Party's 18 to promote strategic deployment to building socialism with Chinese characteristics, presents two 100-year goal, namely, by 2020 China's gross domestic product and per capita income of urban and rural residents in 2010 on the basis of double complete the building of a well-off society; the middle of this century into a prosperous, democratic, civilized and harmonious Socialist modern country, and on this basis, the Chinese dream of realizing the great rejuvenation of the Chinese nation. 18 Congress of the party, Comrade XI Jinping repeatedly expounded the Chinese dream. The basic connotation of the Chinese dream, is the national prosperity, nationalrevitalization, the happiness of the people, China important to follow is to keep China Road, carry forward the spirit and cohesion strength of China, dream dreams of the people of China, but determined confidence, enhance self-awareness, achieve self-reliance, to build a stronger China, civilization, harmony, beauty, China, China, China. Strategic conception of China was 18 the spirit of the enrichment and development of the party, conscientiously study the Chinese dream, leading people to hard to realize the Chinese dream, mass education activities in depth the fundamental starting point and ending point. Strengthen the education of the party's mass line, helps to train the collective consciousness of the unity of the party and the people, playing the Chinese dream ideological bases. Comrade Mao Zedong stressed that parties should have \nguage\st countries must have \of will\has
1.3 地球的运动 1.3.1 地球运动的一般特点
【教学目标 】 一、知识目标 1．了解地球自转的方向、速度和周期 2．了解地球公转的轨道、方向、速度和周期。 3．使学生能够看懂“恒星日和太阳日示意图”，说出两者的差异及其原因 二、能力目标 学会运用地球仪演示地球的自转与公转现象，形成空间想象能力。 三、德育目标 培养学生热爱科学和勇于探索的精神，树立科学的宇宙观。 【教学重点】
自转和公转的运动规律。 【教学难点】
使学生能够看懂“恒星日和太阳日示意图”，说出两者的差异及其原因 【教学媒体教具】
投影片、投影仪、吹塑圆片一个（圆片上系一红绳）、地球仪、彩色墨水、滴管、椭球仪、自转角速度和线速度的纸模型。 教学过程
【设疑引入】毛泽东主席有一句著名的诗句“坐地日行八万里”，这种说法是否科学呢？我们的夏半年和冬半年是否相等呢？ 【学生回答】是
【总结讲解】我认为这种说法要辨证的去对待，若位于赤道地区，说法很科学，但对于我们这个地区而言却不是很科学，到底是为什么呢？我们的夏半年和冬半年并不完全相等。这些主要是由于地球的运动造成的，这节课我们就解决这些问题。 【板书】 第三节 地球的运动
第一课时：地球运动的一般特点
【过渡】地球的运动包括自转运动和公转运动两种形式，下面我们逐一学习。 【板书】一、地球的自转 1．方向
【提问】 教室的东西南北方向。 【学生回答】略。
【演示】 教师转动地球仪。 【提问】 描述自转的方向。 【学生回答】略。
【演示】 转换地球仪的观察角度，分别从北极和南极上方观察转动的地球仪。 【提问】 描述从北极看和南极看到的地球自转状态。
roved that a people and a nation, if it does not have its own spiritual pillar, there is no unity of spiritual support, it means that no soul, will lose cohesion and vitality. Figuratively speaking, a sack of potatoes, quantity cannot be too a team, form a joint force; only like granite, so closely United to form invincible, no difficult means of strength. National rejuvenation of Chinese dream, not only embodies the common interests and pursuits, and covers a variety of groups and classes, has a wide applicability and inclusive, with a strong integrating force and lead the force. She embodies the aspirations of several generations of Chinese, reflecting today ... Into sex and purity, and the inevitable requirement of constantly improving the party's governing capacity. Strengthening the construction of the advanced nature and purity, the core problem is always maintaining the party's flesh-and-blood ties with the masses, so that our party will always be the most wholehearted support of the masses. Must take the fundamental interests of the overwhelming majority of the people as the party all the starting point and ending point, the party has always been a common fate with the masses, this is the magic weapon for our party to always maintain the advanced nature and purity. Strengthening the construction of party's advanced nature and purity and enhancing the party's ruling ability will eventually be implemented to realize, safeguard and develop the fundamental interests of the overwhelming majority of the people. All the work merits this s a measure of the party's fundamental standards, is a measure of the party's advanced nature and purity standards. Believe who, depending on who, who, standing on the position of the overwhelming majority of the people are always, always realize, safeguard and develop the fundamental interests of the overwhelming majority of the people, it is a touchstone of the Marxist party of judgement, is also sign of Marxist party is different from other political parties. Marxistpolitical party has a clear political position and historical mission: for the interests of the vast majority of people, committed to the fundamental interests of the overwhelming majority of the people. From the day of the establishment of the Chinese Communist Party, always adhere to basic principles of historical materialism, for the interests of the most people as their goal, always serving as its fundamental purpose and values. Fully trust the masses, closely rely on the masses maintain flesh-and-blood ties with the masses is always the source of our party full of vigor and vitality, is always the most determined in the development of our party and our country. Conscientiously accept supervision by the masses, pay attention to listen to the masses ' assessment, which itself was the party's advanced nature and purity into practical action to realize the fundamental interests of the overwhelming majority of the people. At present, the party committees and leading cadres and the Government generally value the close relations with the masses, do a lot of productive work, but there are still someAccording to Office Party of mass line education practice activities led group of unified arrangements, units main led to for cadres workers Shang a times party lecture, due to himself level limited, only put this stage concentrated learning of experience today and everyone common with learning exchange, purpose is let we further deep understanding mass line of connotation, insisted party of mass line, do masses work, following main from four a aspects told: a, and full awareness party of mass line education practice activities of major meaning Party's 18 major distinct proposed to focus on the party's advanced nature and purity, in the party, with \c and clean for the people\content of the party's mass line and educational practice. This is comrade XI Jinping as party General Secretary and adhere to strictly administering the party, strengthen the party's major decision is in line with the public expectations and strengthening the construction of learning-oriented service innovation of Marxist party's major deployment, is the important measure to advance the great cause of socialism with Chinese characteristics. First, carry out the party's mass line in education practice, was carrying 18 of the party spirit, summon a powerful force for realizing the great rejuvenation of the Chinese nation the Chinese dream of urgent needs. Party's 18 to promote strategic deployment to building socialism with Chinese characteristics, presents two 100-year goal, namely, by 2020 China's gross domestic product and per capita income of urban and rural residents in 2010 on the basis of double complete the building of a well-off society; the middle of this century into a prosperous, democratic, civilized and harmonious Socialist modern country, and on this basis, the Chinese dream of realizing the great rejuvenation of the Chinese nation. 18 Congress of the party, Comrade XI Jinping repeatedly expounded the Chinese dream. The basic connotation of the Chinese dream, is the national prosperity, national revitalization, the happiness of the people, China important to follow is to keep China Road, carry forward the spirit and cohesion strength of China, dream dreams of the people of China, but determined confidence, enhance self-awareness, achieve self-reliance, to build a stronger China, civilization, harmony, beauty, China, China, China. Strategic conception of China was 18 the spirit of the enrichment and development of the party, conscientiously study the Chinese dream, leading people to hard to realize the Chinese dream, mass education activities in depth the fundamental starting point and ending point. Strengthen the education of the party's mass line, helps to train the collective consciousness of the unity of the party and the people, playing the Chinese dream ideological bases. Comrade Mao Zedong stressed that parties should have \common language\st countries must have \of will\has 2 【学生回答】略。
【板书】
记忆方法：右手——四指半握，大拇指代表
地轴指向北极星，四指为自转方向 【提问】 自转一周的时间是多少？ 【学生回答】略。
【演示】 地球仪自转。
【提问】 生活在地球上的人怎样知道地球自转了一周？地球自转一周的时间是多少呢？ 【学生回答】略。
【过渡】 刚才同学回答的很好，地球自转一周的时间随观测参照物的不同而不同。我们一般以太阳和天空中的恒星为参照物，相应的周期我们分别称之为太阳日和恒星日。
【演示和讲解】运用“太阳日和恒星日”（课本第13页）投影片分析“恒星日与太阳日图”中恒星日与太阳日的关系。 同一恒星 注意交代：恒星（除太阳外）距离地球 很遥远，不论地球公转到何处，所看 到的恒星方位几乎不变 结论：
P 恒星日23ｈ56 ＇4＇＇（3600） P E3 P ——自转的真正周期 E2 太阳日24ｈ（＇）——昼夜交替E1 A B
【同时用吹塑片演示】
（1）在黑板上框按一图钉代表太阳S，将一个吹塑片上的红绳固定，让该吹塑片如课本插图中的E1状态，在吹塑片和绳的交点上作记号P，在黑板上描出红绳和地球的位置；
（2）让该吹塑片以P为参考点自转并绕日公转到E2位置，作图。在黑板上用虚线连接太阳和E2，P点未在此线上，说明以太阳为参考点时，地球还未自转一周。在黑板上做E2到P的延长线，此线的上方为遥远的宇宙中的一颗恒星H，该线与SPE1线平行，以该恒星为参考点，则说明地球自转了一周。
（3）要保证以太阳为参考点的自转一周，地球必须继续向前公转到E3点，使S、P、E3三点一线。从图中可以看出，一个太阳日比一个恒星日多转出一个角度SE3H。
roved that a people and a nation, if it does not have its own spiritual pillar, there is no unity of spiritual support, it means that no soul, will lose cohesion and vitality. Figuratively speaking, a sack of potatoes, quantity cannot be too a team, form a joint force; only like granite, so closely United to form invincible, no difficult means of strength. National rejuvenation of Chinese dream, not only embodies the common interests and pursuits, and covers a variety of groups and classes, has a wide applicability and inclusive, with a strong integrating force and lead the force. She embodies the aspirations of several generations of Chinese, reflecting today ... Into sex and purity, and the inevitable requirement of constantly improving the party's governing capacity. Strengthening the construction of the advanced nature and purity, the core problem is always maintaining the party's flesh-and-blood ties with the masses, so that our party will always be the most wholehearted support of the masses. Must take the
fundamental interests of the overwhelming majority of the people as the party all the starting point and ending point, the party has always been a common fate with the masses, this is the magic weapon for our party to always maintain the advanced nature and purity. Strengthening the construction of party's advanced nature and purity and enhancing the party's ruling ability will eventually be implemented to realize, safeguard and develop the fundamental interests of the overwhelming majority of the people. All the work merits this is a measure of the party's fundamental standards, is a measure of the party's advanced nature and purity standards. Believe who, depending on who, who, standing on the position of the overwhelming majority of the people are always, always realize, safeguard and develop the fundamental interests of the overwhelming majority of the people, it is a touchstone of the Marxist party of judgement, is also sign of Marxist party is different from other political parties. Marxist political party has a clear political position and historical mission: for the interests of the vast majority of people, committed to the fundamental interests of the overwhelming majority of the people. From the day of the establishment of the Chinese Communist Party, always adhere to basic principles of historical materialism, for the interests of the most people as their goal, always serving as its fundamental purpose and values. Fully trust the masses, closely rely on the masses maintain flesh-and-blood ties with the masses is always the source of our party full of vigor and vitality, is always the most determined in the development of our party and our country. Conscientiously accept supervision by the masses, pay attention to listen to the masses ' assessment, which itself was the party's advanced nature and purity into practical action to realize the fundamental interests of the overwhelming majority of the people. At present, the party committees and leading cadres and the Government generally value the close relations with the masses, do a lot of productive work, but there are still some2
According to Office Party of mass line education practice activities led group of unified arrangements, units main led to for cadres workers Shang a times party lecture, due to himself level limited, only put this stage concentrated learning of experience today and everyone common with learning exchange, purpose is let we further deep understanding mass line of connotation, insisted party of mass line, do masses work, following main from four a aspects told: a, and full awareness party of mass line education practice activities of major meaning Party's 18 major distinct proposed to focus on the party's advanced nature and purity, in the party, with \c and clean for the people\content of the party's mass line and educational practice. This is comrade XI Jinping as party General Secretary and adhere to strictly administering the party, strengthen the party's major decision is in line with the public expectations and strengthening the construction of learning-oriented service innovation ofMarxist party's major deployment, is the important measure to advance the great cause of socialism with Chinese characteristics. First, carry out the party's mass line in education practice, was carrying 18 of the party spirit, summon a powerful force for realizing the great rejuvenation of the Chinese nation the Chinese dream of urgent needs. Party's 18 to promote strategic deployment to building socialism with Chinese characteristics, presents two 100-year goal, namely, by 2020 China's gross domestic product and per capita income of urban and rural residents in 2010 on the basis of double complete the building of a well-off society; the middle of this century into a prosperous, democratic, civilized and harmonious Socialist modern country, and on this basis, the Chinese dream of realizing the great rejuvenation of the Chinese nation. 18 Congress of the party, Comrade XI Jinping repeatedly expounded the Chinese dream. The basic connotation of the Chinese dream, is the national prosperity, nationalrevitalization, the happiness of the people, China important to follow is to keep China Road, carry forward the spirit and cohesion strength of China, dream dreams of the people of China, but determined confidence, enhance self-awareness, achieve self-reliance, to build a stronger China, civilization, harmony, beauty, China, China, China. Strategic conception of China was 18 the spirit of the enrichment and development of the party, conscientiously study the Chinese dream, leading people to hard to realize the Chinese dream, mass education activities in depth the fundamental starting point and ending point. Strengthen the education of the party's mass line, helps to train the collective consciousness of the unity of the party and the people, playing the Chinese dream ideological bases. Comrade Mao Zedong stressed that parties should have \nguage\st countries must have \of will\has（4）由于地球每天公转东进59分，即图中的角E1SE3的度数。课本中的示意图实际是夸大了该角度。若按照严格的度数画图，就会发现，E1PS线和E2P线距离很近，该恒星距地球十分遥远，这种误差可以忽略，所以图中的三颗恒星是一颗恒星。角E1SE3和角SE3H是内错角，因此一个太阳日，地球实际自转了360度59分，多出的59分，在时间上要用3分56秒。恒星日是地球自转的真正周期。 【板书】
【引导看书】请学生看书中第14页图1.16地球自转角速度和线速度及右侧文字思考地球自转线速度随纬度的升高有什么变化规律？南北两极点的角速度和线速度是多少？
【同时展示模型】 展示与之对应的立体纸制模型，帮助学生理解角速度和线速度的含义。 【板书】3地球自转速度 【总结】
600 通过对地球运动周期的分析得出地球自转的角速度：360
0 15÷24＝15度/每小时 837千米
【讨论】线速度：读图P15自转角速度和线速度图思考各地
300 的线速度和角速度的关系？
【学生回答】略。 150 1447千米 【总结】A角速度全球（除南北极点）都相同
0
B线速度随纬度的升高而递减；注：纬度60度的地方的1500 线速度是赤道的一半（备注：有时间可以引导学生用数学方法
1670千米 分析）
【过渡】以上我们分析了地球的自转，实际上，地球在自转的同时还围绕太阳公转，下面我们就来分析地球的公转 【板书】二、地球的公转 【指导看书】
请同学们阅读教材P15相关内容思考：地球公转的方向？周期？轨道？速度？ 【学生回答】略。 【讲解】
1．地球公转的方向：自西向东
可以简单讲述作为对地球自转方向的巩固
2．地球公转的周期：
365天6时9分10秒
3．地球公转的轨道和速度
轨道：近似正圆的椭圆形
速度：近日点（较快30.3km/s） 远日点 近日点
B （7月初） （1月初） 太阳 roved that a people and a nation, if it does not have its own spiritual pillar, there is no unity of spiritual support, it means that no soul, will lose cohesion and vitality. Figuratively speaking, a sack of potatoes, quantity cannot be too a team, form a joint force; only like granite, so closely United to form invincible, no difficult means of strength. National rejuvenation of Chinese dream, not only embodies the common interests and pursuits, and covers a variety of groups and classes, has a wide applicability and inclusive, with a strong integrating force and lead the force. She embodies the aspirations of several generations of Chinese, reflecting today ... Into sex and purity, and the inevitable requirement of constantly improving the party's governing capacity. Strengthening the construction of the advanced nature and purity, the core problem is always maintaining the party's flesh-and-blood ties with the masses, so that our party will always be the most wholehearted support of the masses. Must take the
fundamental interests of the overwhelming majority of the people as the party all the starting point and ending point, the party has always been a common fate with the masses, this is the magic weapon for our party to always maintain the advanced nature and purity. Strengthening the construction of party's advanced nature and purity and enhancing the party's ruling ability will eventually be implemented to realize, safeguard and develop the fundamental interests of the overwhelming majority of the people. All the work merits this is a measure of the party's fundamental standards, is a measure of the party's advanced nature and purity standards. Believe who, depending on who, who, standing on the position of the overwhelming majority of the people are always, always realize, safeguard and develop the fundamental interests of the overwhelming majority of the people, it is a touchstone of the Marxist party of judgement, is also sign of Marxist party is different from other political parties. Marxist political party has a clear political position and historical mission: for the interests of the vast majority of people, committed to the fundamental interests of the overwhelming majority of the people. From the day of the establishment of the Chinese Communist Party, always adhere to basic principles of historical materialism, for the interests of the most people as their goal, always serving as its fundamental purpose and values. Fully trust the masses, closely rely on the masses maintain flesh-and-blood ties with the masses is always the source of our party full of vigor and vitality, is always the most determined in the development of our party and our country. Conscientiously accept supervision by the masses, pay attention to listen to the masses ' assessment, which itself was the party's advanced nature and purity into practical action to realize the fundamental interests of the overwhelming majority of the people. At present, the party committees and leading cadres and the Government generally value the close relations with the masses, do a lot of productive work, but there are still some- 3 -
方向 According to Office Party of mass line education practice activities led group of unified arrangements, units main led to for cadres workers Shang a times party lecture, due to himself level limited, only put this stage concentrated learning of experience today and everyone common with learning exchange, purpose is let we further deep understanding mass line of connotation, insisted party of mass line, do masses work, following main from four a aspects told: a, and full awareness party of mass line education practice activities of major meaning Party's 18 major distinct proposed to focus on the party's advanced nature and purity, in the party, with \c and clean for the people\content of the party's mass line and educational practice. This is comrade XI Jinping as party General Secretary and adhere to strictly administering the party, strengthen the party's major decision is in line with the public expectations and strengthening the construction of learning-oriented service innovation of Marxist party's major deployment, is the important measure to advance the great cause of socialism with Chinese characteristics. First, carry out the party's mass line in education practice, was carrying 18 of the party spirit, summon a powerful force for realizing the great rejuvenation of the Chinese nation the Chinese dream of urgent needs. Party's 18 to promote strategic deployment to building socialism with Chinese characteristics, presents two 100-year goal, namely, by 2020 China's gross domestic product and per capita income of urban and rural residents in 2010 on the basis of double complete the building of a well-off society; the middle of this century into a prosperous, democratic, civilized and harmonious Socialist modern country, and on this basis, the Chinese dream of realizing the great rejuvenation of the Chinese nation. 18 Congress of the party, Comrade XI Jinping repeatedly expounded the Chinese dream. The basic connotation of the Chinese dream, is the national prosperity, national revitalization, the happiness of the people, China important to follow is to keep China Road, carry forward the spirit and cohesion strength of China, dream dreams of the people of China, but determined confidence, enhance self-awareness, achieve self-reliance, to build a stronger China, civilization, harmony, beauty, China, China, China. Strategic conception of China was 18 the spirit of the enrichment and development of the party, conscientiously study the Chinese dream, leading people to hard to realize the Chinese dream, mass education activities in depth the fundamental starting point and ending point. Strengthen the education of the party's mass line, helps to train the collective consciousness of the unity of the party and the people, playing the Chinese dream ideological bases. Comrade Mao Zedong stressed that parties should have \common language\st countries must have \of will\has 4 和远日点（较慢29.3km/s）
（备注：该部分可以补充右图讲解）读地球在公转轨道不同位置时公转速度的变化，观察角速度和线速度的关系
（补充知识：开普勒三定律增加学生对公转角速度和线速度的理解） 【板书】 1、方向：自西向东
2、周期：365天6时9分10秒
3、轨道：近似正圆的椭圆形
4、速度：近日点（较快30.3km/s）和远日点（较慢29.3km/s）
【课堂总结】
【探究性作业】P16活动3
【板书设计】
第三节 地球的运动
第一课时：地球运动的一般特点 一、地球的自转 1．方向
3．地球自转速度 二、地球的公转 1．方向：自西向东
2．周期：365天6时9分10秒 3．轨道：近似正圆的椭圆形
4．速度：近日点（较快30.3km/s）和远日点（较慢29.3km/s）
1.3.2 地球自转与时差
【教学目标 】 一、知识目标
roved that a people and a nation, if it does not have its own spiritual pillar, there is no unity of spiritual support, it means that no soul, will lose cohesion and vitality. Figuratively speaking, a sack of potatoes, quantity cannot be too a team, form a joint force; only like granite, so closely United to form invincible, no difficult means of strength. National rejuvenation of Chinese dream, not only embodies the common interests and pursuits, and covers a variety of groups and classes, has a wide applicability and inclusive, with a strong integrating force and lead the force. She embodies the aspirations of several generations of Chinese, reflecting today ... Into sex and purity, and the inevitable requirement of constantly improving the party's governing capacity. Stre
fundamental interests of the overwhelming majority of the people as the party all the starting point and ending point, the party has always been a common fate with the masses, this is the magic weapon for our party to always maintain the advanced nature and purity. Strengthening the construction of party's advanced nature and purity and enhancing the party's ruling ability will eventually be implemented to realize, safeguard and develop the fundamental interests of the overwhelming majority of the people. All the work merits this is a measure of the party's fundamental standards, is a measure of the party's advanced nature and purity standards. Believe who, depending on who, who, standing on the position of the overwhelming majority of the people are always, always realizepolitical party has a clear political position and historical mission: for the interests of the vast majority of people, committed to the fundamental interests of the overwhelming majority of the people. From the day of the establishment of the Chinese Communist Party, always adhere to basic principles of historical materialism, for the interests of the most people as their goal, always serving as its fundamental purpose and values. Fully trust the masses, closely rely on the masses maintain flesh-and-blood ties with the masses is always the source of our party full of vigor and vitality, is always the most determined in the development of our party and our country. Conscientiously accept supervision by the masses, pay attention to listen to the masses ' assessment, wvalue the close relations with the masses, do a lot of productive work, but there are still some4
nced nature and purity, the core problem is always maintaining the party's flesh-and-blood ties with the masses, so that our party will always be the most wholehearted support of the masses. Must take the , safeguard and develop the fundamental interests of the overwhelming majority of the people, it is a touchstone of the Marxist party of judgement, is also sign of Marxist party is different from other political parties. Marxist party's advanced nature and purity into practical action to realize the fundamental interests of the overwhelming majority of the people. At present, the party committees and leading cadres and the Government generally ngthening the construction of the advahich itself was the According to Office Party of mass line education practice activities led group of unified arrangements, units main led to for cadres workers Shang a times party lecture, due to himself level limited, only put this stage concentrated learning of experience today and everyone common with learning exchange, purpose is let we further deep understanding mass line of connotation, insisted party of mass line, do masses work, following main from four a aspects told: a, and full awareness party of mass line education practice activities of major meaning Party's 18 major distinct proposed to focus on the party's advanced nature and purity, in the party, with \c and clean for the people\content of the party's mass line and educational practice. This is comrade XI Jinping as party General Secretary and adhere to strictly administering the party, strengthen the party's major decision is in line with the public expectations and strengthening the construction of learning-oriented service innovation ofMarxist party's major deployment, is the important measure to advance the great cause of socialism with Chinese characteristics. First, carry out the party's mass line in education practice, was carrying 18 of the party spirit, summon a powerful force for realizing the great rejuvenation of the Chinese nation the Chinese dream of urgent needs. Party's 18 to promote strategic deployment to building socialism with Chinese characteristics, presents two 100-year goal, namely, by 2020 China's gross domestic product and per capita income of urban and rural residents in 2010 on the basis of double complete the building of a well-off society; the middle of this century into a prosperous, democratic, civilized and harmonious Socialist modern country, and on this basis, the Chinese dream of realizing the great rejuvenation of the Chinese nation. 18 Congress of the party, Comrade XI Jinping repeatedly expounded the Chinese dream. The basic connotation of the Chinese dream, is the national prosperity, nationalrevitalization, the happiness of the people, China important to follow is to keep China Road, carry forward the spirit and cohesion strength of China, dream dreams of the people of China, but determined confidence, enhance self-awareness, achieve self-reliance, to build a stronger China, civilization, harmony, beauty, China, China, China. Strategic conception of China was 18 the spirit of the enrichment and development of the party, conscientiously study the Chinese dream, leading people to hard to realize the Chinese dream, mass education activities in depth the fundamental starting point and ending point. Strengthen the education of the party's mass line, helps to train the collective consciousness of the unity of the party and the people, playing the Chinese dream ideological bases. Comrade Mao Zedong stressed that parties should have \nguage\st countries must have \of will\has 1．使学生了解昼半球、夜半球、时区、地方时等概念 2．理解昼夜更替产生的原理；并能画出晨昏线 3．理解地方时、区时的成因；并会计算不同地方的地方时和区时； 二、能力目标 1．能在不同的光照图中画出晨昏线 2．能计算不同地方的地方时和区时 【教学重点】 昼半球、夜半球、时区、地方时的计算 【教学难点】 1、晨昏线的画法； 2、时间的计算； 【教学媒体教具】
投影片、投影仪、地球仪、时区和国际日期变更线图、或多媒体教具
【讲授过程】
【知识回顾】 1．地球自转的周期、方向 2．地球自转的周期、方向、轨道 【新课讲授】
【引入新课】在我们的日常生活中，我们知道有昼夜变化，为什么回出现昼和夜的差别呢？我们在假期中可能看了雅典奥运会，若想看直播现场，大多数会在我们的晚上或夜间进行，这又是为什么呢？这些都是由于地球自转与时差造成的，下面我们便来解决这个问题。 【板书】第二课时：地球自转与时差
【引导读书】请同学们阅读教材P16——17内容思考什么是晨昏线？地方时又是如何计算的？
【学生回答】略
【板书】一、晨昏线（圈） N 【讲解】
由于地球是一个既不发光、也不透明的 球体，所以在同一时间里，太阳只能照亮地球 太昏 阳表面的一半。向着太阳的半球是白天，背着太 夜弧 晨光阳的半球是黑夜(如图)。昼半球和夜半球的分 线 昼弧 线 线 界线(圈)，叫做晨昏线(圈)。晨昏线(圈)把经 昼弧 过的纬线分割成昼弧（绿色虚线）和夜弧（兰
色虚线）。
下面我们具体介绍一下晨昏线： S 【板书】1晨昏圈概念：
昼半球和夜半球的分界线为晨昏圈由晨线和昏线组成
【板书】2晨昏线的画法：
【板图】 晨昏线的画法（图2）A
roved that a people and a nation, if it does not have its own spiritual pillar, there is no unity of spiritual support, it means that no soul, will lose cohesion and vitality. Figuratively speaking, a sack of potatoes, quantity cannot be too a team, form a joint force; only like granite, so closely United to form invincible, no difficult means of strength. National rejuvenation of Chinese dream, not only embodies the common interests and pursuits, and covers a variety of groups and classes, has a wide applicability and inclusive, with a strong integrating force and lead the force. She embodies the aspirations of several generations of Chinese, reflecting today ... Into sex and purity, and the inevitable requirement of constantly improving the party's governing capacity. Strengthening the construction of the advanced nature and purity, the core problem is always maintaining the party's flesh-and-blood ties with the masses, so that our party will always be the most wholehearted support of the masses. Must take the
fundamental interests of the overwhelming majority of the people as the party all the starting point and ending point, the party has always been a common fate with the masses, this is the magic weapon for our party to always maintain the advanced nature and purity. Strengthening the construction of party's advanced nature and purity and enhancing the party's ruling ability will eventually be implemented to realize, safeguard and develop the fundamental interests of the overwhelming majority of the people. All the work merits this is a measure of the party's fundamental standards, is a measure of the party's advanced nature and purity standards. Believe who, depending on who, who, standing on the position of the overwhelming majority of the people are always, always realize, safeguard and develop the fundamental interests of the overwhelming majority of the people, it is a touchstone of the Marxist party of judgement, is also sign of Marxist party is different from other political parties. Marxist political party has a clear political position and historical mission: for the interests of the vast majority of people, committed to the fundamental interests of the overwhelming majority of the people. From the day of the establishment of the Chinese Communist Party, always adhere to basic principles of historical materialism, for the interests of the most people as their goal, always serving as its fundamental purpose and values. Fully trust the masses, closely rely on the masses maintain flesh-and-blood ties with the masses is always the source of our party full of vigor and vitality, is always the most determined in the development of our party and our country. Conscientiously accept supervision by the masses, pay attention to listen to the masses ' assessment, which itself was the party's advanced nature and purity into practical action to realize the fundamental interests of the overwhelming majority of the people. At present, the party committees and leading cadres and the Government generally value the close relations with the masses, do a lot of productive work, but there are still some- 5 -