第一篇：地球是圓的

如何證明地球是圓的？

能證明地球是球形的方法還有很多：

1.地平線為弧形；

2.海平面上的航船從遠方來，總是先看到桅桿、后看到船體，證明地球是球形；

3.日食、月食時，觀察月球，太陽食面總有一定的弧度。證明地球是圓；

4.麥哲侖的環球航行；

5.發生月偏食時，地球擋住一部分日光，使地球的影子投射在月面上，就像給地球照鏡子，使我們看見了地球的球體形狀。

最簡單的證明是拿一張人造衛星的照片，眼見為實。

地球是圓的這個猜想在人類文明早期（無論東西方）都是存在的，當然只是作為眾多猜想中的一支。第一個證明地面是有弧度的是古希臘數學家Eratosthenes，公元前240年，他已經應用巧妙的方法測算出地球的周長。Eratosthenes于每年夏至中午觀測太陽在埃及亞歷山大港的標桿的影子，其入射角為7.2度；同時在其東南面500英里(1英里約等于1.6千米)外的一處地方，陽光恰好射到一個枯井的底部。（參考提供的鏈接）

當然當時地球是圓的這種觀點并不是所有人接受，但隨著文明的進步，尤其是天文，航海的發展，這種觀點日益深入人心。麥哲倫的環球航行（從東往西航行最后回到出發地）從實踐上證明了地球是圓的。

牛頓力學的發展最終從理論上證明地球應該是圓的，而且所有天體都應該是圓的。萬有引力定律指出，物體之間是相互吸引的，組成物體的各個部分都有向中心靠攏的趨勢。力求取得離重心較近的位置。因此在不受干擾的情況下，物體必逐漸聚集為球形。

進入20世紀，航空航天的發展使得直接觀察地球變為可能。人們最終直接證明了地球是圓的。

注：嚴格而言，地球并非正圓形，由于自轉引起的離心作用，低緯度地區聚集了更多物質。因而顯得突出。使地球呈類似橢球的形狀。

第二篇：地球是圓的英語作文

地球是圓的英語作文.txt每天早上起床都要看一遍“福布斯”富翁排行榜，如果上面沒有我的名字，我就去上班。談錢不傷感情，談感情最他媽傷錢。我詛咒你一輩子買方便面沒有調料包。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.人與環境是和諧相處的，我們生存在地球上，人是自然之子，而不能僅把人看作自然的征服者，大家都知道，人類只有一個地球，地球上的山山水水、動物。植物是人類的細胞，如果我們把它損壞了，破壞了大自然的組織，等于消滅人類。因此，環境要與社會公德聯系起來，與實踐行為作為人格教育的一項重要內容來抓。每個人都要履行保護環境的責任和義務。

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.” 分享給你的朋友吧： 人人網 新浪微博 開心網 MSN QQ空間

對我有幫助

8回答時間：2010-11-22 20:05 | 我來評論

第三篇：地球是圓的英語作文

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.人與環境是和諧相處的，我們生存在地球上，人是自然之子，而不能僅把人看作自然的征服者，大家都知道，人類只有一個地球，地球上的山山水水、動物。植物是人類的細胞，如果我們把它損壞了，破壞了大自然的組織，等于消滅人類。因此，環境要與社會公德聯系起來，與實踐行為作為人格教育的一項重要內容來抓。每個人都要履行保護環境的責任和義務。

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.” 分享給你的朋友吧： 人人網 新浪微博 開心網 MSN QQ空間

對我有幫助

8回答時間：2010-11-22 20:05 | 我來評論

第四篇：《地球是個美麗的圓》教學設計

《地球是個美麗的圓》教學設計

【教材分析】

《地球是個美麗的圓》歌曲首演于2000年上海國際藝術節。歌詞形象地描繪了國際性的合作與交流，表達了在綠色星球上，人類為了共同的藝術而牽手狂歡的盛景。曲調為大調式，結構為帶不再現的單二部曲式。

【教學目標】

1、通過對歌曲《地球是個美麗的圓》的演唱,呼喚同學們關注我們美麗的地球,共同為創建綠色家園而努力。

2、在欣賞過程中體會轉調過程中樂曲的和聲色彩變化，轉調部分的演唱可不做要求。

3、了解通俗音樂知識。能用親切歡快的聲音演唱歌曲《地球是個美麗的園》，掌握音樂要素在作品中的表現作用。

【教學重點】

1、把握藝術（音樂）學科特點的同時，以生命教育貫穿教學，引領學生感恩，感悟親情。

2、用親切歡快的聲音演唱歌曲，表達和平、友愛、共進的主題，表達喜迎世博的心情。

【教學難點】以作品的欣賞和演唱、表演活動激發學生內心的情感共鳴。

【教學內容與過程】

一、導入教學：

歌曲介紹：

《地球是個美麗的圓》首演于2000年第七屆中國上海國際藝術節，歌詞用“地球是個美麗的圓”形象地描繪了國際性的藝術合作與交流。歌曲由廖昌永、倪睿思演唱。歌曲曲調為大調式，結構為單二部曲式。第二樂段通過反復、變調渲染了“同一陽光下，共織藝術花環”的情誼。

二、歌曲欣賞

1、欣賞歌曲，思考：歌曲的節奏和情緒是怎樣的？

2、小組討論：歌曲表達的是什么樣的情感？

（簡潔的歌詞表達了世界各國的藝術者傳播友誼的形象，體現了和平、友愛、共進的藝術節主題）

3、你知道嗎？

你還知道有哪些表現和平友愛的作品？

4、拓展：世博會

三：歌曲演唱《地球是個美麗的圓》

1、感受歌曲： 學生初聽歌曲，感受歌曲情緒。（引導學生帶問題去欣賞歌曲，提高欣賞效果。）學生表達自己的感受：??

2、唱準歌曲：出示歌曲總譜生再次聆聽歌曲，熟悉歌曲內容，給樂曲分段。

3、節奏學習

4、學唱旋律：教師范唱，學生分小組自學，可以借助課堂樂器幫助。

5、填詞演唱學生朗誦歌詞，再聽歌曲，看歌詞輕唱感受歌曲。

6、學生輕聲跟琴演唱歌曲，教師適當指導。

說明：用自然、明亮的聲音，以及積極的歌唱狀態輕松自如地進行歌唱。演唱時注意八度跳進的音準。

7、集體演唱，并配上簡單的動作（牽手、揮手、左右晃動身體）

四、小結：讓我們在愛的世界中感恩；讓我們與愛同行；讓世界充滿愛。

教學反思：

《地球是個美麗的圓》：“地球”代表大自然，美麗的“圓”正是人們所向往的。在本節課上，我以地球為載體，以感受大自然、保護大自然、熱愛生活為主線，通過看、聽、賞、唱、創、演來展開教學。具體教學理念體現在以下幾個方面：

一、營造輕松活潑的開放式教學環境，注重“游戲”在音樂環境創設中的作用

所謂開放式的教學，就是運用教學規律，在有限的時間里，把課堂主動權交給學生，充分發揮學生的主動性，使他們融入到這個教學活動中來，更重要的是使他們綜合運用所學的各種文化知識，其形式可以多樣化，加以競賽游戲方式更能達到好的效果。在導入教學環節里，為了讓學生了解地球相關的地理知識，我沒有采用傳統的教學模式，教師提出問題，學生回答，而是由學生自主探索，自我發現問題，自我解答問題。“你問我答”的形式在學生的一問一答中潛移默化地掌握了知識，還增強了學生之間的團結合作，互幫互助的學習能力。采用競賽的方式，使學生的積極性得到提高，在輕松愉快的氣氛中進入教學環節。

二、創設視覺與聽覺互動的多媒體教學，提高學生發現美、欣賞美的能力

情感體驗階段是音樂欣賞過程中十分重要的環節。音樂共鳴之處在于傳情，但這種傳情不象文學作品和繪畫那樣能產生直觀的具體形象。再好的音樂也不可能清晰地解釋周圍的事物，不可能明確地表現物體的形象。充分利用現代化多媒體教學手段，將音樂、圖畫、情節有機地結合在一起，它能給音樂課創造聽覺形象與視覺形象的聯合體。在感受大自然的教學環節，我運用多媒體教學，給學生展示了一個鳥兒啼唱，微風低吟令人神往的維也納森林和一片生機勃勃的動物世界的畫面，讓學生耳聞目睹具體的視聽形象，調動學生多種感官的參與、體驗，使學生的對音樂的想象不再空洞，以此來激發學生感受美、理解美、欣賞美的情感。

三、注重音樂教學的感性認識上升到理性思考，豐富音樂教學的德育內涵

人類認識發展的一般規律是從感性認識到理性認識，由具體到抽象。音樂教育的主要特點是以情動人，以情感人，是以培養人的審美情感為主要目的。音樂是情感的藝術，學生在音樂課上得到更多的是一種感性認識，而在理性思考上就欠缺了一點，所以，在這節課上，我讓學生感受音樂的同時，隨時對學生提出一些理性的思考。在聆聽《一個真實的故事》環節，提出“在生活中如何對待身邊的動物”讓學生進行理性思考；在保護地球的環節，我提出了對環境污染現象的分析和如何保護我們的校園環境的理性思考。通過對學生提出的一系列的理性思考的問題，使這節課的德育教育更加豐富，學生在理性思考的同時，也懂得了許多的道理，了解環境保護的重要性，學會更加珍惜現在的美好生活，保持積極樂觀的生活態度。

四、以學生為本，更以學生的“發展”為主，注重培養學生的創新思維能力。

音樂教育是以學生為對象，以音樂藝術為載體，以審美教育為核心的基礎教育，其根本目的是培養全面發展的人。一切為了學生發展的現代教育理念，注重對學生音樂興趣的培養，也是學生學習音樂的主要動力。在以學生為主體的前提下，我認為更要注重學生的長遠發展，在這節課的教學上，我通過“你問我答”的游戲環節，把課堂交給學生，“你問”培養了學生對知識的研究探索能力，“我答”培養了自我學習的能力，讓學生成為課堂的主人，不僅激發學生的學習興趣，而且滿足了學生探究的需要，獲得認可與欣賞的需要，真正地做到以學生為本。在《校園環保倡議書》的創作活動中，以小組為單位鼓勵學生求新、求異，不僅培養學生的創新精神和實踐能力，而且既面向全體，又注重個性的發展，使學生獲得合作學習的快樂，為學生終身愛好音樂奠基，真正做到以學生的“發展”為主。

第五篇：《地球是個美麗的圓》教學反思

本節課較好的完成了本節課的教學任務，用新穎的教學方式激發了學生的學習興趣，將本節課的主題“愛”貫穿整堂音樂課，讓學生在溫馨自在的氛圍中完成了本節課的學習。

《地球是個美麗的圓》這首歌描寫了在美麗的地球上，人們不分國籍不分種族的友誼的愛。通過這首歌作者表達了呼吁世界和平的口號。本節課我以和平友愛為主線，通過聽、欣賞、唱、表演等不同方式來展開教學。

一、營造輕松活潑的學習氛圍

本節課的導入環節，我采用各國小朋友前來問好的方式導入，既體現出友好的主題，又通過問好方式導出本節課的重點節奏型，讓學生在輕松有趣的環境中自然而然的學會知識。

二、引導學生自主學習

本節課我采用教師教授和學生自主學習相結合的方式，歌曲第一部分，我將本節課的重點節奏型和難點語句進行詳細講解，學習歌曲第二部分時，我將第二部分交給學生自己，引導學生通過自己的努力和同學之間的相互幫助來完成第二部分的學習。這樣既使學生學到了知識，又培養了學生團結合作相互幫助的精神。

三、明確歌曲主題

本節課的教授環節，我并沒有忙于教授歌曲，我引導學生聆聽歌曲，通過聆聽歌曲的情緒和歌曲的題目來分析本首歌的主題，明確歌曲主題。

四、從學習歌曲到歌舞結合音樂課堂不只是學生對歌曲本身的學習，更是對歌曲的感受和體會。本節課在完成課本歌曲的教學后，我為學生播放了另一個男女生對唱版本的《地球是個美麗的圓》并賦予舞蹈。讓學生在學習課本知識的同時感受到了不同版本所帶來的不同感覺，通過舞蹈的學習，豐富了學生的肢體語言，滿足了學生的表現欲望，加深了學生對歌曲的印象。

五、注重音樂教學從感性認識上升到理性認識，豐富音樂教

學的德育內涵

音樂教育主要是以情動人，以情感人是以培養人的審美情感為主要目的。音樂是情感的藝術，學生在音樂課上得到更多的是一種感性認識，而缺乏理性思考，所以在這節課上，我通過這首歌引申出“我們能為地球做些什么”展開保護地球方法的討論。最后通過象征和平友好的和平鴿，將孩子們對朋友、老師的愛傳達出去，升華了本節課的主題，讓學生切實的體會到人與人之間的愛。