地球是圆的

第一篇：地球是圆的

如何证明地球是圆的？

能证明地球是球形的方法还有很多：

1.地平线为弧形；

2.海平面上的航船从远方来，总是先看到桅杆、后看到船体，证明地球是球形；

3.日食、月食时，观察月球，太阳食面总有一定的弧度。证明地球是圆；

4.麦哲仑的环球航行；

5.发生月偏食时，地球挡住一部分日光，使地球的影子投射在月面上，就像给地球照镜子，使我们看见了地球的球体形状。

最简单的证明是拿一张人造卫星的照片，眼见为实。

地球是圆的这个猜想在人类文明早期（无论东西方）都是存在的，当然只是作为众多猜想中的一支。第一个证明地面是有弧度的是古希腊数学家Eratosthenes，公元前240年，他已经应用巧妙的方法测算出地球的周长。Eratosthenes于每年夏至中午观测太阳在埃及亚历山大港的标杆的影子，其入射角为7.2度；同时在其东南面500英里(1英里约等于1.6千米)外的一处地方，阳光恰好射到一个枯井的底部。（参考提供的链接）

当然当时地球是圆的这种观点并不是所有人接受，但随着文明的进步，尤其是天文，航海的发展，这种观点日益深入人心。麦哲伦的环球航行（从东往西航行最后回到出发地）从实践上证明了地球是圆的。

牛顿力学的发展最终从理论上证明地球应该是圆的，而且所有天体都应该是圆的。万有引力定律指出，物体之间是相互吸引的，组成物体的各个部分都有向中心靠拢的趋势。力求取得离重心较近的位置。因此在不受干扰的情况下，物体必逐渐聚集为球形。

进入20世纪，航空航天的发展使得直接观察地球变为可能。人们最终直接证明了地球是圆的。

注：严格而言，地球并非正圆形，由于自转引起的离心作用，低纬度地区聚集了更多物质。因而显得突出。使地球呈类似椭球的形状。

第二篇：地球是圆的英语作文

地球是圆的英语作文.txt每天早上起床都要看一遍“福布斯”富翁排行榜，如果上面没有我的名字，我就去上班。谈钱不伤感情，谈感情最他妈伤钱。我诅咒你一辈子买方便面没有调料包。Harmony with the environment is that we live in on Earth, who is a natural son, and not only to natural persons as the conqueror, as we all know, there is only one earth and the mountains on Earth, the animals.Plant human cells, if it damaged, destroyed nature organizations, to the eradication of mankind.Therefore, the environment must be linked with social ethics, character education and practice acts as an important element of it.Everyone must fulfil its responsibilities and obligations to protect the environment.人与环境是和谐相处的，我们生存在地球上，人是自然之子，而不能仅把人看作自然的征服者，大家都知道，人类只有一个地球，地球上的山山水水、动物。植物是人类的细胞，如果我们把它损坏了，破坏了大自然的组织，等于消灭人类。因此，环境要与社会公德联系起来，与实践行为作为人格教育的一项重要内容来抓。每个人都要履行保护环境的责任和义务。

The moon origin mystery: for lunar origins, scientists put forward three kinds of theories: capture said, homology and earth divided them all defective, said, but the Apollo would help proof, which seem least likely theory is the best theory.Some scientists think, the moon is with earth in 46 billion years ago, from a group of cosmic dust generator.Another theory is that the moon is the earth's “children”, is perhaps the Pacific “dig” out.However Apollo moon exploration results show that the earth and the moon the composition of the difference is very big, some scientists have proposed another hypothesis, namely “captured”.They think that the moon is accidentally broke into gravitational field, and be locked in the present orbit.However, it is theoretically explain the process mechanism, is extremely difficult.Therefore, the above three theory all difficult to hold water.As robin hallam especially by dr said: “to explain the moon does not exist, than to explain the moon exist easier.”

The moon age riddle: what is amazing is that the rock samples from the moon back, via analysis found that about 99 percent age than earth 90% oldest rocks more older.Armstrong in “quiet sea” after landing picked up the first piece of rock's age is 36 billion years old.Some other rock age 4.3 billion years old, 4.6 billion years old and 45 billion years old — — it almost and earth and solar system itself, the earth is as old as the oldest rocks is 37 billion years old.In 1973, the world symposium on the moon was a age determination for 53 billion years old of moon rocks.Is more surprising is that these ancient rocks are collected from scientists believe to be the youngest area on the moon.In light of the evidence, some scientists propose that the moon on earth formed before long was established in interstellar space formed.The lunar soil years older than rock greater mystery: the moon ancient rock has made scientists helpless, however, and these rocks, compared to the surrounding soil rock is young.According to the analysis, soil age at least 10 years than rock.At first glance, sounds, this is impossible because scientists think these soils are rock after smashing formation.But, determination of rock and soil chemical composition, the scientists found that, after the soil and rock is irrelevant, seem to come from elsewhere.When a massive object when the moon, the moon hit send hollow balls like voice mystery: in Apollo exploration process, abandoned the rockets third quarter thrusters will boom the bump on the surface of the moon.According to NASA document records, “each such noise, sounds like a big the sound of the bell”.When the moon landing in color special personnel black plains, they found on the surface of the moon drilling very difficult.Soil sample by analysis found that, which contains a large number of rare earth metal titanium(it was used in the supersonic jet and spacecraft on);Others, such as zirconium, hard metal iridium, beryllium content is also very rich.This makes scientists puzzled, because these metal only in high temperature — — about 45 degrees Fahrenheit, will and surrounding rock as a whole.Stainless iron mystery: lunar surface rock sample still contain among them pure iron granules, scientists think they are not from meteorites.The former Soviet union and American scientists has found a more strange phenomenon: these pure iron granules on earth put seven years is not rust.In the scientific world, didn't rusty pure iron is unheard of.The moon radioactive mystery: the moon in thickness of eight miles surface is radioactive, this also is a astonishing phenomenon.When “Apollo 15th” astronauts using temperature timing, they found reading extraordinarily high, which suggests that Italy plain nearby heat flux indeed temperature is very high.A scientist exclaimed, “oh god, this land will soon melted!The moon's core must be more hot.” However, is it surprising is that month heart temperature is not high.The heat from the surface of the moon of radioactive substances emit, but these radioactive substances(uranium and plutonium, thallium)and where do you come from? If they are from the heart, so how could they on to the surface of the moon?

Dry on the moon is large hydrosphere mystery: the first few times that the moon, the moon is a dry celestial bodies.A scientist had assert that it than the gobi desert dry 100 million times.Apollo missions of the first few times are not on the surface of the moon found any water trace.But “Apollo 15th” scientists has detected the surface of the moon is one place 100 square miles of water gas.Scientists red face argue that this is the American astronaut waste in the moon two small tank leakage causes.But such small tank can produce such a large hydrosphere? Of course this is not astronauts — — it directly spray urine to the moon in the sky.It seems that these moisture from the moon internal.The surface of the moon is glass shape puzzle: Apollo astronauts discovered many places, the surface of the moon is covered with glass shape material, which suggests that the surface of the moon appears to be burning fiery fireball.As one scientist has pointed out, “the moon with glass.” Expert analysis proof, this layer of glass of substance is not huge meteoritic impact generated, some scientists believe that, this is the explosion of the sun — — some miniature nova state — — consequences.The moon of the magnetic field mystery: early detection and studies show that the moon, but almost no magnetic field of moon rocks analysis has proved it had strong magnetic field.This phenomenon makes scientists dumbfounded Paul jester doctor declared: “here is very strange magnetic rock...is quite beyond our expectation.” If the moon had magnetic field, it should have an iron core, but of reliable evidence shows that the moon may not have such a core, And the moon will not possible from other objects(such as earth)obtain magnetic field, because if it is indeed the case, then it must be very close from earth, then it will be gravity ripped to pieces.The moon internal mysterious “material aggregation point” mystery: 1968, flying around the moon, the moon probe the first to show the below the surface exist “material gathered structures”.When the spacecraft flying over these structures over, due to their great gravity, shuttle flight will slightly below the prescribed orbit, but when the ship leave these structures clouds, it will speeding slightly, it clearly shows that the material gathered structure exists, and their great quality.Scientists think, these structures is like a bull 's-eye, by heavy elements constitute, hidden in the surface of the moon “hai” below.As one scientist has said: “it seems that who also don't know how to deal with them.” 分享给你的朋友吧： 人人网 新浪微博 开心网 MSN QQ空间

对我有帮助

8回答时间：2010-11-22 20:05 | 我来评论

第三篇：地球是圆的英语作文

Harmony with the environment is that we live in on Earth, who is a natural son, and not only to natural persons as the conqueror, as we all know, there is only one earth and the mountains on Earth, the animals.Plant human cells, if it damaged, destroyed nature organizations, to the eradication of mankind.Therefore, the environment must be linked with social ethics, character education and practice acts as an important element of it.Everyone must fulfil its responsibilities and obligations to protect the environment.人与环境是和谐相处的，我们生存在地球上，人是自然之子，而不能仅把人看作自然的征服者，大家都知道，人类只有一个地球，地球上的山山水水、动物。植物是人类的细胞，如果我们把它损坏了，破坏了大自然的组织，等于消灭人类。因此，环境要与社会公德联系起来，与实践行为作为人格教育的一项重要内容来抓。每个人都要履行保护环境的责任和义务。

The moon origin mystery: for lunar origins, scientists put forward three kinds of theories: capture said, homology and earth divided them all defective, said, but the Apollo would help proof, which seem least likely theory is the best theory.Some scientists think, the moon is with earth in 46 billion years ago, from a group of cosmic dust generator.Another theory is that the moon is the earth's “children”, is perhaps the Pacific “dig” out.However Apollo moon exploration results show that the earth and the moon the composition of the difference is very big, some scientists have proposed another hypothesis, namely “captured”.They think that the moon is accidentally broke into gravitational field, and be locked in the present orbit.However, it is theoretically explain the process mechanism, is extremely difficult.Therefore, the above three theory all difficult to hold water.As robin hallam especially by dr said: “to explain the moon does not exist, than to explain the moon exist easier.”

The moon age riddle: what is amazing is that the rock samples from the moon back, via analysis found that about 99 percent age than earth 90% oldest rocks more older.Armstrong in “quiet sea” after landing picked up the first piece of rock's age is 36 billion years old.Some other rock age 4.3 billion years old, 4.6 billion years old and 45 billion years old — — it almost and earth and solar system itself, the earth is as old as the oldest rocks is 37 billion years old.In 1973, the world symposium on the moon was a age determination for 53 billion years old of moon rocks.Is more surprising is that these ancient rocks are collected from scientists believe to be the youngest area on the moon.In light of the evidence, some scientists propose that the moon on earth formed before long was established in interstellar space formed.The lunar soil years older than rock greater mystery: the moon ancient rock has made scientists helpless, however, and these rocks, compared to the surrounding soil rock is young.According to the analysis, soil age at least 10 years than rock.At first glance, sounds, this is impossible because scientists think these soils are rock after smashing formation.But, determination of rock and soil chemical composition, the scientists found that, after the soil and rock is irrelevant, seem to come from elsewhere.When a massive object when the moon, the moon hit send hollow balls like voice mystery: in Apollo exploration process, abandoned the rockets third quarter thrusters will boom the bump on the surface of the moon.According to NASA document records, “each such noise, sounds like a big the sound of the bell”.When the moon landing in color special personnel black plains, they found on the surface of the moon drilling very difficult.Soil sample by analysis found that, which contains a large number of rare earth metal titanium(it was used in the supersonic jet and spacecraft on);Others, such as zirconium, hard metal iridium, beryllium content is also very rich.This makes scientists puzzled, because these metal only in high temperature — — about 45 degrees Fahrenheit, will and surrounding rock as a whole.Stainless iron mystery: lunar surface rock sample still contain among them pure iron granules, scientists think they are not from meteorites.The former Soviet union and American scientists has found a more strange phenomenon: these pure iron granules on earth put seven years is not rust.In the scientific world, didn't rusty pure iron is unheard of.The moon radioactive mystery: the moon in thickness of eight miles surface is radioactive, this also is a astonishing phenomenon.When “Apollo 15th” astronauts using temperature timing, they found reading extraordinarily high, which suggests that Italy plain nearby heat flux indeed temperature is very high.A scientist exclaimed, “oh god, this land will soon melted!The moon's core must be more hot.” However, is it surprising is that month heart temperature is not high.The heat from the surface of the moon of radioactive substances emit, but these radioactive substances(uranium and plutonium, thallium)and where do you come from? If they are from the heart, so how could they on to the surface of the moon?

Dry on the moon is large hydrosphere mystery: the first few times that the moon, the moon is a dry celestial bodies.A scientist had assert that it than the gobi desert dry 100 million times.Apollo missions of the first few times are not on the surface of the moon found any water trace.But “Apollo 15th” scientists has detected the surface of the moon is one place 100 square miles of water gas.Scientists red face argue that this is the American astronaut waste in the moon two small tank leakage causes.But such small tank can produce such a large hydrosphere? Of course this is not astronauts — — it directly spray urine to the moon in the sky.It seems that these moisture from the moon internal.The surface of the moon is glass shape puzzle: Apollo astronauts discovered many places, the surface of the moon is covered with glass shape material, which suggests that the surface of the moon appears to be burning fiery fireball.As one scientist has pointed out, “the moon with glass.” Expert analysis proof, this layer of glass of substance is not huge meteoritic impact generated, some scientists believe that, this is the explosion of the sun — — some miniature nova state — — consequences.The moon of the magnetic field mystery: early detection and studies show that the moon, but almost no magnetic field of moon rocks analysis has proved it had strong magnetic field.This phenomenon makes scientists dumbfounded Paul jester doctor declared: “here is very strange magnetic rock...is quite beyond our expectation.” If the moon had magnetic field, it should have an iron core, but of reliable evidence shows that the moon may not have such a core, And the moon will not possible from other objects(such as earth)obtain magnetic field, because if it is indeed the case, then it must be very close from earth, then it will be gravity ripped to pieces.The moon internal mysterious “material aggregation point” mystery: 1968, flying around the moon, the moon probe the first to show the below the surface exist “material gathered structures”.When the spacecraft flying over these structures over, due to their great gravity, shuttle flight will slightly below the prescribed orbit, but when the ship leave these structures clouds, it will speeding slightly, it clearly shows that the material gathered structure exists, and their great quality.Scientists think, these structures is like a bull 's-eye, by heavy elements constitute, hidden in the surface of the moon “hai” below.As one scientist has said: “it seems that who also don't know how to deal with them.” 分享给你的朋友吧： 人人网 新浪微博 开心网 MSN QQ空间

对我有帮助

8回答时间：2010-11-22 20:05 | 我来评论

第四篇：《地球是个美丽的圆》教学设计

《地球是个美丽的圆》教学设计

【教材分析】

《地球是个美丽的圆》歌曲首演于2000年上海国际艺术节。歌词形象地描绘了国际性的合作与交流，表达了在绿色星球上，人类为了共同的艺术而牵手狂欢的盛景。曲调为大调式，结构为带不再现的单二部曲式。

【教学目标】

1、通过对歌曲《地球是个美丽的圆》的演唱,呼唤同学们关注我们美丽的地球,共同为创建绿色家园而努力。

2、在欣赏过程中体会转调过程中乐曲的和声色彩变化，转调部分的演唱可不做要求。

3、了解通俗音乐知识。能用亲切欢快的声音演唱歌曲《地球是个美丽的园》，掌握音乐要素在作品中的表现作用。

【教学重点】

1、把握艺术（音乐）学科特点的同时，以生命教育贯穿教学，引领学生感恩，感悟亲情。

2、用亲切欢快的声音演唱歌曲，表达和平、友爱、共进的主题，表达喜迎世博的心情。

【教学难点】以作品的欣赏和演唱、表演活动激发学生内心的情感共鸣。

【教学内容与过程】

一、导入教学：

歌曲介绍：

《地球是个美丽的圆》首演于2000年第七届中国上海国际艺术节，歌词用“地球是个美丽的圆”形象地描绘了国际性的艺术合作与交流。歌曲由廖昌永、倪睿思演唱。歌曲曲调为大调式，结构为单二部曲式。第二乐段通过反复、变调渲染了“同一阳光下，共织艺术花环”的情谊。

二、歌曲欣赏

1、欣赏歌曲，思考：歌曲的节奏和情绪是怎样的？

2、小组讨论：歌曲表达的是什么样的情感？

（简洁的歌词表达了世界各国的艺术者传播友谊的形象，体现了和平、友爱、共进的艺术节主题）

3、你知道吗？

你还知道有哪些表现和平友爱的作品？

4、拓展：世博会

三：歌曲演唱《地球是个美丽的圆》

1、感受歌曲： 学生初听歌曲，感受歌曲情绪。（引导学生带问题去欣赏歌曲，提高欣赏效果。）学生表达自己的感受：„„

2、唱准歌曲：出示歌曲总谱生再次聆听歌曲，熟悉歌曲内容，给乐曲分段。

3、节奏学习

4、学唱旋律：教师范唱，学生分小组自学，可以借助课堂乐器帮助。

5、填词演唱学生朗诵歌词，再听歌曲，看歌词轻唱感受歌曲。

6、学生轻声跟琴演唱歌曲，教师适当指导。

说明：用自然、明亮的声音，以及积极的歌唱状态轻松自如地进行歌唱。演唱时注意八度跳进的音准。

7、集体演唱，并配上简单的动作（牵手、挥手、左右晃动身体）

四、小结：让我们在爱的世界中感恩；让我们与爱同行；让世界充满爱。

教学反思：

《地球是个美丽的圆》：“地球”代表大自然，美丽的“圆”正是人们所向往的。在本节课上，我以地球为载体，以感受大自然、保护大自然、热爱生活为主线，通过看、听、赏、唱、创、演来展开教学。具体教学理念体现在以下几个方面：

一、营造轻松活泼的开放式教学环境，注重“游戏”在音乐环境创设中的作用

所谓开放式的教学，就是运用教学规律，在有限的时间里，把课堂主动权交给学生，充分发挥学生的主动性，使他们融入到这个教学活动中来，更重要的是使他们综合运用所学的各种文化知识，其形式可以多样化，加以竞赛游戏方式更能达到好的效果。在导入教学环节里，为了让学生了解地球相关的地理知识，我没有采用传统的教学模式，教师提出问题，学生回答，而是由学生自主探索，自我发现问题，自我解答问题。“你问我答”的形式在学生的一问一答中潜移默化地掌握了知识，还增强了学生之间的团结合作，互帮互助的学习能力。采用竞赛的方式，使学生的积极性得到提高，在轻松愉快的气氛中进入教学环节。

二、创设视觉与听觉互动的多媒体教学，提高学生发现美、欣赏美的能力

情感体验阶段是音乐欣赏过程中十分重要的环节。音乐共鸣之处在于传情，但这种传情不象文学作品和绘画那样能产生直观的具体形象。再好的音乐也不可能清晰地解释周围的事物，不可能明确地表现物体的形象。充分利用现代化多媒体教学手段，将音乐、图画、情节有机地结合在一起，它能给音乐课创造听觉形象与视觉形象的联合体。在感受大自然的教学环节，我运用多媒体教学，给学生展示了一个鸟儿啼唱，微风低吟令人神往的维也纳森林和一片生机勃勃的动物世界的画面，让学生耳闻目睹具体的视听形象，调动学生多种感官的参与、体验，使学生的对音乐的想象不再空洞，以此来激发学生感受美、理解美、欣赏美的情感。

三、注重音乐教学的感性认识上升到理性思考，丰富音乐教学的德育内涵

人类认识发展的一般规律是从感性认识到理性认识，由具体到抽象。音乐教育的主要特点是以情动人，以情感人，是以培养人的审美情感为主要目的。音乐是情感的艺术，学生在音乐课上得到更多的是一种感性认识，而在理性思考上就欠缺了一点，所以，在这节课上，我让学生感受音乐的同时，随时对学生提出一些理性的思考。在聆听《一个真实的故事》环节，提出“在生活中如何对待身边的动物”让学生进行理性思考；在保护地球的环节，我提出了对环境污染现象的分析和如何保护我们的校园环境的理性思考。通过对学生提出的一系列的理性思考的问题，使这节课的德育教育更加丰富，学生在理性思考的同时，也懂得了许多的道理，了解环境保护的重要性，学会更加珍惜现在的美好生活，保持积极乐观的生活态度。

四、以学生为本，更以学生的“发展”为主，注重培养学生的创新思维能力。

音乐教育是以学生为对象，以音乐艺术为载体，以审美教育为核心的基础教育，其根本目的是培养全面发展的人。一切为了学生发展的现代教育理念，注重对学生音乐兴趣的培养，也是学生学习音乐的主要动力。在以学生为主体的前提下，我认为更要注重学生的长远发展，在这节课的教学上，我通过“你问我答”的游戏环节，把课堂交给学生，“你问”培养了学生对知识的研究探索能力，“我答”培养了自我学习的能力，让学生成为课堂的主人，不仅激发学生的学习兴趣，而且满足了学生探究的需要，获得认可与欣赏的需要，真正地做到以学生为本。在《校园环保倡议书》的创作活动中，以小组为单位鼓励学生求新、求异，不仅培养学生的创新精神和实践能力，而且既面向全体，又注重个性的发展，使学生获得合作学习的快乐，为学生终身爱好音乐奠基，真正做到以学生的“发展”为主。

第五篇：《地球是个美丽的圆》教学反思

本节课较好的完成了本节课的教学任务，用新颖的教学方式激发了学生的学习兴趣，将本节课的主题“爱”贯穿整堂音乐课，让学生在温馨自在的氛围中完成了本节课的学习。

《地球是个美丽的圆》这首歌描写了在美丽的地球上，人们不分国籍不分种族的友谊的爱。通过这首歌作者表达了呼吁世界和平的口号。本节课我以和平友爱为主线，通过听、欣赏、唱、表演等不同方式来展开教学。

一、营造轻松活泼的学习氛围

本节课的导入环节，我采用各国小朋友前来问好的方式导入，既体现出友好的主题，又通过问好方式导出本节课的重点节奏型，让学生在轻松有趣的环境中自然而然的学会知识。

二、引导学生自主学习

本节课我采用教师教授和学生自主学习相结合的方式，歌曲第一部分，我将本节课的重点节奏型和难点语句进行详细讲解，学习歌曲第二部分时，我将第二部分交给学生自己，引导学生通过自己的努力和同学之间的相互帮助来完成第二部分的学习。这样既使学生学到了知识，又培养了学生团结合作相互帮助的精神。

三、明确歌曲主题

本节课的教授环节，我并没有忙于教授歌曲，我引导学生聆听歌曲，通过聆听歌曲的情绪和歌曲的题目来分析本首歌的主题，明确歌曲主题。

四、从学习歌曲到歌舞结合音乐课堂不只是学生对歌曲本身的学习，更是对歌曲的感受和体会。本节课在完成课本歌曲的教学后，我为学生播放了另一个男女生对唱版本的《地球是个美丽的圆》并赋予舞蹈。让学生在学习课本知识的同时感受到了不同版本所带来的不同感觉，通过舞蹈的学习，丰富了学生的肢体语言，满足了学生的表现欲望，加深了学生对歌曲的印象。

五、注重音乐教学从感性认识上升到理性认识，丰富音乐教

学的德育内涵

音乐教育主要是以情动人，以情感人是以培养人的审美情感为主要目的。音乐是情感的艺术，学生在音乐课上得到更多的是一种感性认识，而缺乏理性思考，所以在这节课上，我通过这首歌引申出“我们能为地球做些什么”展开保护地球方法的讨论。最后通过象征和平友好的和平鸽，将孩子们对朋友、老师的爱传达出去，升华了本节课的主题，让学生切实的体会到人与人之间的爱。