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新人教版高中英語必修3Unit 3 Diverse Cultures-Listening &Speaking＆Talking教學(xué)設(shè)計
1. In Picture 1 and Picture 2, where do you think they are from? How do you know?From their wearings, we can know they are from ethnic minority of China--- Miao and Dong.Picture 1, they are playing their traditional instrument lusheng in their traditional costumes.Picture 2. the girls are Miao because they wear their traditional costumes and silver accessory.2. In Picture 3, can you find which village it is? What time is it in the picture?It is Dong village. It is at night. Step 2 While-listeningJustin met a new friend while traveling in Guizhou. Listen to their conversation and complete the summaries below.Part 1Justin and Wu Yue watched some Miao people play the lusheng. The instrument has a history of over 3,000 years and it is even mentioned in the oldest collection of Chinese poetry. Then they watched the lusheng dance. Justin wanted to buy some hand-made silver/traditional accessories as souvenirs. He was told that the price will depend on the percentage of silver. Part 2They will go to a pretty Dong minority village called Zhaoxing. they will see the drum towers and the wind and rain bridges. They may also see a performance of the Grand Song of the Dong people.Step 3 Post-listening---TalkingWork in groups. Imagine Justin is telling some friends about his trip to Guizhou. One of you is Justin and the rest of you are his friends. Ask Justin questions about his trip and experience. The following expressions may help you.
新人教版高中英語必修3Unit 3 Diverse Cultures-Reading and Thinking教學(xué)設(shè)計
Discuss these questions in groups.Q1: Have you ever been to a place that has a diverse culture ? What do you think about the culture diversity ?One culturally diverse place that I have been to is Harbin, the capital city of Heilongjiang Province. I went there last year with my family to see the Ice and Snow Festival, and I was amazed at how the culture as different to most other Chinese cities. There is a big Russian influence there, with beautiful Russian architecture and lots of interesting restaurants. I learnt that Harbin is called “the Oriental Moscow” and that many Russians settled there to help build the railway over 100 years ago.Q2: What are the benefits and challenges of cultural diversity ?The benefits: People are able to experience a wide variety of cultures, making their lives more interesting, and it can deepen the feelings for our national culture, it is also helpful for us to learn about other outstanding culture, which helps improve the ability to respect others. The challenges: People may have trouble communicating or understanding each other, and it may lead to disappearance of some civilizations and even make some people think “The western moon is rounder than his own.”Step 7 Post reading---RetellComplete the passage according to the text.Today, I arrived back in San Francisco, and it feels good (1) _____(be) back in the city again. The city succeeded in (2)_________ (rebuild) itself after the earthquake that (3)________ (occur) in 1906, and I stayed in the Mission District, enjoying some delicious noodles mixed with cultures. In the afternoon, I headed to a local museum (4)____ showed the historical changes in California. During the gold rush, many Chinese arrived, and some opened up shops and restaurants in Chinatown to earn a (5)_____ (live). Many others worked on (6)______ (farm), joined the gold rush, or went to build the railway that connected California to the east. The museum showed us (7)____ America was built by immigrants from (8)________ (difference) countries and cultures. In the evening, I went to Chinatown, and ate in a Cantonese restaurant that served food on (9)________(beauty) china plates. Tomorrow evening, I’m going to (10)__ jazz bar in the Richmond District. 答案：1. to be 2. rebuilding 3. occurred 4. that 5.living6. farms 7.how 8. different 9. beautiful 10. a
新人教版高中英語必修3Unit 4 Space Exploration-Discovering Useful Structure教學(xué)設(shè)計
The theme of the section is “Describe space facts and efforts to explore space”. Infinitives are one of non-finite verbs, as the subjects, objects, predicative, attributes and adverbials. This unit is about space exploration, which is a significant scientific activity, so every scientific activity has strong planning. Therefore, using the infinitives to show its purpose, explanations or restrictions is the best choice.1. Learn the structure, functions and features of infinitives.2. Learn to summarize some rules about infinitives to show purpose and modify.3. Learn to use infinitives in oral and writing English. 1. Learn the structure, functions and features of infinitives.2. Learn to summarize some rules about infinitives to show purpose and modify.3. Learn to use use infinitives in oral and writing English.Step 1 Lead in---Pair workLook at the following sentences and focus on the italicized infinitives. In pairs, discuss their functions. 1. I trained for a long time to fly airplanes as a fighter pilot..(作目的狀語)2. As we all know, an astronaut needs to be healthy and calm in order to work in space..(作目的狀語)3. First of all, you must be intelligent enough to get a related college degree..(作目的狀語)4. Some scientist were determined to help humans realise their dream to explore space..(作定語)5. On 12 April 1961, Yuri Gagarin became the first person in the world to go into space..(作定語)Summary:1. 不定式的結(jié)構(gòu)：to+do原形。2. 分析上面的句子，我們知道在描述太空探索時，動詞不定式不僅可以用來表目的，還可以用來作定語，表修飾。
新人教版高中英語必修3Unit 4 Space Exploration-Listening&Speaking＆Talking教學(xué)設(shè)計二
The themes of this part are “Talk about how to become an astronaut” and “Talk about life in space”. As Neil Armstrong said “Mystery creates wonder and wonder is the basis of man’s desire to understand. Space is difficult for human to reach, therefore, humans are full of wonders about it. However, if wanting to achieve the dream of reaching the Moon, some of our human should work hard to be an astronaut at first. Part A(Talk about how to become an astronaut) is a radio interview in a radio studio, where the host asked the Chinese astronauts about his story how to become an astronaut. Yang Liwei told his dreamed to be an astronaut since childhood. Then he worked hard to get into college at 22. The next 10 years, he gradually became an experienced pilot. At the same time, to be an astronaut, he had to study hard English, science and astronomy and trained hard to keep in good physical and mental health and to practise using space equipment. Part B (Talk about life in space) is also an interview with the astronaut Brown, who is back on the earth. The host Max asked about his space life, such as his emotion about going back the earth, the eating, shower, brushing, hobbies and his work. Part A and Part B are interviews. So expressing curiosity about the guests’ past life is a communicative skill, which students should be guided to learn.1. Students can get detailed information about how Yang Liwei became an astronaut and Max’s space life.2. Students learn to proper listening strategy to get detailed information---listening for numbers and taking notes.3. Students can learn related sentences or phrases to express their curiosity like “ I wish to know...” “I’d love to know...”4. Students can learn more about the space and astronauts, even be interested in working hard to be an astronaut
新人教版高中英語必修3Unit 5 The Value of Money- Discovering Useful Structure教學(xué)設(shè)計
Step 3 Meaning1. 過去將來時表示從過去某一時間來看將要發(fā)生的動作或存在的狀態(tài), 常用在賓語從句中。一般由“would/should +動詞原形”構(gòu)成。She hoped that they would meet again someday. 她希望將來有一天他們能再見面。2. was/were going to+動詞原形: 表示過去將要發(fā)生或很有可能發(fā)生的動作, 常用于口語中, 表示預(yù)言、意圖或者打算等。He was going to start work the following week. 他打算下星期開始工作。3. was/were about to do: 常用來表示即將發(fā)生的動作, “剛要/正要做……”。注意該結(jié)構(gòu)不與任何時間狀語連用。I felt that something terrible was about to happen. 我感到某種可怕的事情即將發(fā)生。4.was/were to do: 表示“曾計劃做某事”, 如果表示“本來計劃做某事, 動作沒實現(xiàn)”, 則需用 “was/were to have done”。She said she was to have told me about the accident. 她說她本來想告訴我關(guān)于事故的事。5.Start, go, come, leave, see, meet等動詞的過去進行時: 表示就過去某一時刻而言即將發(fā)生的動作。She was coming later. 她隨后就來。I had just put on my overcoat and was leaving to visit a friend of mine. 我剛穿上外套要去看我的一個朋友。
新人教版高中英語必修3Unit 5 The Value of Money-Listening &Speaking教學(xué)設(shè)計
Step 4: Listen again and decide if the following statements are true (T) or false (F).1 It was the first time Chen Liyan's story was reported. T口 F口2 Chen found 10,000 yuan in a small plastic bag in Taiyuan railway station口 F口3 Wang Zheng apologized to Chen because he couldn't offer her more money. T口 F口4 Chen took out a large loan to cure her daughter, T口 F口5 Wang set up a fundraising website for Chen's daughter after Chen told him about her situation. T口 F口Step 5：After listening, discuss the questions.1 What kind of person do you think Chen Liyan is?Chen Liyan is generous and honest because she returned a large sum of money to the owner.2 Did Chen return the money because she didn't need it?No. She returned the money because it was the right thing to do. Evidence for this is that she refused to accept the reward money because she felt that it had not been earned. 3 Is it common for people to do what Chen did?It depends on the culture. In some countries it is quite common to return money that has been found. In other countries, people believe "Finders are keepers!" 4 How did Wang Zheng feel about the return of his money?He must have been very happy and relieved to have gotten his money back. We know this because he thanked Chen repeatedly and even offered her a reward.5 Why did Ma Dongbao tell Wang about Chen's family?He must have had great sympathy for Chen and her daughter and wanted to help them.'We know this because he arranged help for them. 6 How did the news reporter feel about Chen's actions?The news reporter felt that it showed that money wasn't the most important thing in life. We know this because the reporter told us that this is what Chen believes. and then said, “that's a great attitude to take."
新人教版高中英語必修3Unit 5 The value of money-Reading and Thinking教學(xué)設(shè)計二
? Could you offer me some kind of work here?? I don’t want your charity, I just want an honest job.? Careless: I landed in Britain by accident.Step 7:Consolidation.? Find Henry? Roderick and Oliver were I .making a bet when they saw Henry, a poor young man. ? Know Henry? About a month ago, Henry was sailing and later he found himself carried out to sea by a strong wind. Fortunately, he 2.was spotted by a ship. And it was the ship that brought him to 3.England? Offer money to Henry ? Oliver and Roderick gave Henry a letter and told him that there was money in it. They 4.persuaded him to accept it, and made him 5.promise that it wouldn't be opened until 2 o'clock.Step 8：Language pointsa large amount of: a large quantity of; a great deal ofe.g. They bought a large amount of furniture before they moved their new house.make a bet: make an arrangement to risk money, etc. on an event of which the result is doubtful.e.g. We made a bet on the result of the match.permit sb to do something: allow somebody to do somethinge.g. My mother doesn’t permit me to ride in the street after it rained.by accident: as a result of chancee.g. I only found it by accident.stare at: look at somebody or something with the eyes wide open in a fixed gaze( in astonishment, wonder, fear, etc)to be honest: to tell you the truth; to be franke.g. To be honest, I don’t think we have a chance of winning.Step7 Homework:What do you think will happen to Henry? Will the bank-note help him or get him into trouble?
新人教版高中英語必修3Unit 5 The Value of Money-Reading for Writing教學(xué)設(shè)計二
2. 您能看到, 我頭發(fā)太長了。You can see that my hair is much too long.3. 無論什么時候, 只要您想回來就回來。Please come back whenever you want.4. 您僅有很少的頭發(fā)要理! You only have too little hair to cut !5. 為您服務(wù)是我的榮幸！It is my honour to serve you!Step 9 Writing(Henry is walking down the street when he sees a sign for a place that cuts hair. He decides to have it cut. )H=Henry B=BarberH: Good afternoon, I’d like to have my hair cut, if I may. (The barber looks at Henry’s hair and continues cutting another man’s hair. ) Er, I’d really like a haircut. As you can see it’s much too long. B: (in a rude manner) Yes, I can see that. Indeed, I can. H: Fine, well, I’ll have a seat then. (He sits in one of the barber’s chairs. The barber turns to look at Henry. )B: It’s quite expensive here, you know! Are you sure you can afford it?H: Yes. I think so. (After his hair is cut, the barber tells Henry how much he must pay. Henry shows the barber the bank note. )B: Why Mr. . . (looks shocked)H: Adams. Henry Adams. I’m sorry. I don’t have any change. B: Please don’t worry! (wearing a big smile) Nothing to worry about! Nothing at all! Please come back whenever you want, even if you only have too little hair to cut! It will be my honour to serve you!Step 10 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Are all the elements of a play included and in good order ?2. Do the character use suitable language ?3. Are the stage directions clear and useful ?4. Is the plot clear and exciting enough ?
新人教版高中英語選修2Unit 1 Science and Scientists-Discovering useful structures教學(xué)設(shè)計
The grammatical structure of this unit is predicative clause. Like object clause and subject clause, predicative clause is one of Nominal Clauses. The leading words of predicative clauses are that, what, how, what, where, as if, because, etc.The design of teaching activities aims to guide students to perceive the structural features of predicative clauses and think about their ideographic functions. Beyond that, students should be guided to use this grammar in the context apporpriately and flexibly.1. Enable the Ss to master the usage of the predicative clauses in this unit.2. Enable the Ss to use the predicative patterns flexibly.3. Train the Ss to apply some skills by doing the relevant exercises.1.Guide students to perceive the structural features of predicative clauses and think about their ideographic functions.2.Strengthen students' ability of using predicative clauses in context, but also cultivate their ability of text analysis and logical reasoning competence.Step1: Underline all the examples in the reading passage, where noun clauses are used as the predicative. Then state their meaning and functions.1) One theory was that bad air caused the disease.2) Another theory was that cholera was caused by an infection from germs in food or water.3) The truth was that the water from the Broad Street had been infected by waste.Sum up the rules of grammar:1. 以上黑體部分在句中作表語。2. 句1、2、3中的that在從句中不作成分，只起連接作用。 Step2: Review the basic components of predicative clauses1.Definition
新人教版高中英語選修2Unit 1 Science and Scientists-Learning about Language教學(xué)設(shè)計
Step 7: complete the discourse according to the grammar rules.Cholera used to be one of the most 1.__________ (fear) diseases in the world. In the early 19th century, _2_________ an outbreak of cholera hit Europe, millions of people died. But neither its cause, 3__________ its cure was understood. A British doctor, John Snow, wanted to solve the problem and he knew that cholera would not be controlled _4_________ its cause was found. In general, there were two contradictory theories 5 __________ explained how cholera spread. The first suggested that bad air caused the disease. The second was that cholera was caused by an _6_________(infect) from germs in food or water. John Snow thought that the second theory was correct but he needed proof. So when another outbreak of cholera hit London in 1854, he began to investigate. Later, with all the evidence he _7_________ (gather), John Snow was able to announce that the pump water carried cholera germs. Therefore, he had the handle of the pump _8_________ (remove) so that it couldn't be used. Through his intervention，the disease was stopped in its tracks. What is more, John Snow found that some companies sold water from the River Thames that __9__________________ (pollute) by raw waste. The people who drank this water were much more likely _10_________ (get) cholera than those who drank pure or boiled water. Through John Snow's efforts, the _11_________ (threaten) of cholera around the world saw a substantial increase. Keys： 1.feared 2.when 3. nor 4.unless 5.that/which 6.infection 7.had gathered 8.removed 9.was polluted 10.to get 11. threat
新人教版高中英語選修2Unit 1 Science and Scientists-Using langauge教學(xué)設(shè)計
This happens because the dish soap molecules have a strong negative charge, and the milk molecules have a strong positive charge. Like magnets, these molecules are attracted to each other, and so they appear to move around on the plate, taking the food coloring with them, making it look like the colors are quickly moving to escape from the soap.Listening text:? Judy: Oh, I'm so sorry that you were ill and couldn't come with us on our field trip. How are you feeling now? Better?? Bill: Much better, thanks. But how was it?? Judy: Wonderful! I especially liked an area of the museum called Light Games.it was really cool. They had a hall of mirrors where I could see myself reflected thousands of times!? Bill: A hall of mirrors can be a lot of fun. What else did they have?? Judy: Well, they had an experiment where we looked at a blue screen for a while, and then suddenly we could see tiny bright lights moving around on it. You'll never guess what those bright lights were!? Bill: Come on, tell me!? Judy: They were our own blood cells. For some reason, our eyes play tricks on us when we look at a blue screen, and we can see our own blood cells moving around like little lights! But there was another thing I liked better. I stood in front of a white light, and it cast different shadows of me in every color of the rainbow!? Bill: Oh, I wish I had been there. Tell me more!? Judy: Well, they had another area for sound. They had a giant piano keyboard that you could use your feet to play. But then, instead of playing the sounds of a piano, it played the voices of classical singers! Then they had a giant dish, and when you spoke into it, it reflected the sound back and made it louder. You could use it to speak in a whisper to someone 17 meters away.? Bill: It all sounds so cool. I wish I could have gone with you? Judy: I know, but we can go together this weekend. I'd love to go there again!? Bill: That sounds like a great idea!
新人教版高中英語選修2Unit 2 Bridging Cultures-Discovering useful structures教學(xué)設(shè)計
The grammar of this unit is designed to review noun clauses. Sentences that use nouns in a sentence are called noun clauses. Nominal clauses can act as subject, object, predicate, appositive and other components in compound sentences. According to the above-mentioned different grammatical functions, nominal clauses are divided into subject clause, object clause, predicate clause and appositive clause. In this unit, we will review the three kinds of nominal clauses. Appositive clauses are not required to be mastered in the optional compulsory stage, so they are not involved.1. Guide the students to judge the compound sentences and determine the composition of the clauses in the sentence.2. Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.3. Inspire the students to systematize the function and usage of noun clause1.Instruct students to try to learn grammar by generalizing grammar rules, controlling written practice, and semi-open oral output.2.Inspire the students to systematize the function and usage of noun clauseStep1: The teacher ask studetns to find out more nominal clauses from the reading passage and udnerline the nominal clauses.
新人教版高中英語選修2Unit 3 Food and Culture-Reading and thinking教學(xué)設(shè)計
The discourse explores the link between food and culture from a foreign’s perspective and it records some authentic Chinese food and illustrates the cultural meaning, gerography features and historic tradition that the food reflects. It is aimed to lead students to understand and think about the connection between food and culture. While teaching, the teacher should instruct students to find out the writing order and the writer’s experieces and feelings towards Chinese food and culture.1.Guide the students to read the text, sort out the information and dig out the topic.2.Understand the cultural connotation, regional characteristics and historical tradition of Chinese cuisine3.Understand and explore the relationship between food and people's personality4.Guide the students to use the cohesive words in the text5.Lead students to accurately grasp the real meaning of the information and improve the overall understanding ability by understanding the implied meaning behind the text.1. Enable the Ss to understand the structure and the writing style of the passage well.2. Lead the Ss to understand and think further about the connection between food and geography and local character traits.Step1: Prediction before reading. Before you read, look at the title, and the picture. What do you think this article is about?keys:It is about various culture and cuisine about a place or some countries.
新人教版高中英語選修2Unit 5 First Aid-Discovering useful structures教學(xué)設(shè)計
You have no excuse for not going.你沒有理由不去。He was punished for not having finished his homework.他因未完成作業(yè)而受到懲罰。2．動詞ing形式復(fù)合結(jié)構(gòu)由物主代詞或人稱代詞賓格、名詞所有格或普通格加動詞ing，即“sb./sb.'s＋doing”構(gòu)成。動詞ing形式的復(fù)合結(jié)構(gòu)實際上是給動詞ing形式加了一個邏輯主語。動詞ing形式的復(fù)合結(jié)構(gòu)有四種形式：①形容詞性物主代詞＋動詞ing②名詞所有格＋動詞ing③代詞賓格＋動詞ing④名詞＋動詞ingHer coming to help encouraged all of us.她來幫忙鼓舞了我們所有人。The baby was made awake by the door suddenly shutting.這個嬰兒被突然的關(guān)門聲吵醒了。Can you imagine him/Jack cooking at home?你能想象他/杰克在家做飯的樣子嗎？無生命名詞無論是作主語還是作賓語都不能用第②種形式。Tom's winning first prize last year impressed me a lot.湯姆去年得了一等獎使我印象深刻。Do you mind my/me/Jack's/Jack leaving now?你介意我/杰克現(xiàn)在離開嗎？Excuse me for my not coming on time．很抱歉我沒能按時來。His father's being ill made him worried.他父親病了，他很擔(dān)心。We are looking forward to the singer's/the singer to give us a concert.我們盼望著這位歌手來給我們舉辦一場演唱會。
人教版高中地理必修1第二章第三節(jié)常見的天氣系統(tǒng)教案
一、知識和技能1．了解鋒面系統(tǒng)、低壓系統(tǒng)、高壓系統(tǒng)的特點2．理解氣旋與反氣旋的形成過程、氣流運動特點，掌握氣旋、反氣旋氣流運動的規(guī)律性3．使學(xué)生掌握氣旋和反氣旋控制下的天氣狀況二、過程和方法1．掌握各天氣系統(tǒng)活動規(guī)律和處在不同天氣系統(tǒng)及其不同部位的天氣特點，利用天氣圖進行天氣形勢分析預(yù)報2．能夠說明這些天氣系統(tǒng)是如何對所到達(dá)地區(qū)的天氣產(chǎn)生影響的，能夠結(jié)合當(dāng)?shù)厍闆r分析學(xué)校所在地曾經(jīng)發(fā)生的災(zāi)害性天氣及其影響下的天氣系統(tǒng)3．通過研究氣旋和反氣旋的形成過程，使學(xué)生初步具備研究問題的方法與步驟4．通過對冷鋒與暖鋒天氣系統(tǒng)的對比分析來實現(xiàn)學(xué)生地理綜合分析能力的提高。通過對鋒面氣旋的分析來建立地理空間思維的習(xí)慣三、情感、態(tài)度、價值觀1．通過本節(jié)課學(xué)習(xí)，讓學(xué)生懂得學(xué)科學(xué)、愛科學(xué)，獻身氣象事業(yè)，為“四化”建設(shè)服務(wù)
人教版高中地理必修1第二章第四節(jié)全球氣候變化教案
氣候變化對健康的影響 氣候變化對人體健康的不良影響是不難發(fā)現(xiàn)的：熱浪沖擊頻繁加重可致死亡率及某些疾病、特別是心臟呼吸系統(tǒng)疾病發(fā)病率增加；對氣候變化敏感的傳染性疾病如瘧疾和登革熱的傳播范圍可能增加。極端氣候事件, 如干旱、水災(zāi)、暴風(fēng)雨等, 使死亡率、傷殘率及傳染病疾病率上升, 并增加社會心理壓力。某些媒介疾病的加重也可能與氣候變化有間接的關(guān)系, 如瘧疾是通過蚊子傳播的疾病,氣候變化可能使某些變暖地區(qū)的蚊子數(shù)目增加, 從而加重了瘧疾的發(fā)生。我國1994年瘧疾的發(fā)病率為5.3408/10萬, 居全國法定傳染病的第六位。血吸蟲病的發(fā)展與高溫及灌溉系統(tǒng)的擴增有關(guān)。我國1994年南方12省市血吸蟲病患者的檢出率高達(dá)3.67%，不能忽視氣候變化對此的可能影響。還有一些疾病，如睡眠病、登革熱、黑熱病等也有與氣候關(guān)系的報道。另外, CO2、一些空氣污染物如氮氧化物、臭氧等可增加過敏疾患及心臟呼吸系統(tǒng)疾病和死亡。
人教版高中地理必修1第四章第二節(jié)山岳的形成教案
一、明確課標(biāo)要求1.了解褶皺的概念和褶皺的基本形態(tài)；2.了解褶皺山的形成和褶皺山的基本形態(tài)特征；3.能夠在不同的示意圖中識別和判讀背斜與向斜；4.知道和理解斷層的概念和斷塊山的形成，了解斷塊山的基本形態(tài)特征；5.知道火山的形成、結(jié)構(gòu)和規(guī)模。二、教學(xué)目標(biāo)知識目標(biāo)：1.結(jié)合具體圖像，了解褶皺山的形成及基本形態(tài)特征。2.能在示意圖上識別和判斷背斜和向斜。3.理解內(nèi)外力共同作用下形成的“背斜成谷，向斜成山”，并能夠明白其形成的原因。4.能夠結(jié)合實例，理解斷塊山的形成及基本特征。5.知道火山的形成、結(jié)構(gòu)和規(guī)模。過程與方法目標(biāo)：1.結(jié)合實例，分析造成地表形態(tài)變化的內(nèi)力、外力因素。2.通過案例，嘗試聯(lián)系實際，培養(yǎng)動手演示、判讀圖像、比較、分析、歸納的能力。
人教版高中地理必修1第四章第三節(jié)河流地貌的發(fā)育教案
1．流水堆積地貌由于河床坡度降低，導(dǎo)致流速減小 ，或者其他原因，引起河流搬運能力降低，促使沉積發(fā)生，形成堆積地貌。常見的河流堆積地貌主要有以下幾種：(1)沖積扇平原沖積扇是河流出山口處的扇形堆積體。河流出 山口后，比降顯著減小，水流又分成許多交漢，成扇狀向外流動，河流能量顯著降低，大量物質(zhì)堆積下來，又有利于河流改道。隨著各支汊的不斷堆積和變遷，就形成沖積扇。沖積扇的物質(zhì)結(jié)構(gòu)，一般是頂部物質(zhì)較粗，主要為沙、礫 ，隨著水流搬運能力向邊緣減弱，堆積的物質(zhì)逐漸變細(xì)，邊緣一般多為沙、粉沙及亞粘土，分選性較好，所以沖積扇是較好的含水層，邊緣常有泉水出 露，可發(fā)展自流灌 溉。若山地河谷隨山地間歇抬升，也可形成疊置沖積扇。(2)河漫灘平原河漫灘平原發(fā)源于河流中下游。在河流中下游地區(qū)，河流下蝕作用減弱，側(cè)蝕作用加強，河流往往凹岸侵蝕，在凸岸堆積形成水下堆積體。堆積體 的面積逐漸擴大，在枯水季節(jié)露出水面，形成河漫灘(見下圖)。
人教版高中地理必修1第五章第二節(jié)自然地理環(huán)境的差異性教案
【補充說明】我們這節(jié)課簡要地分析了陸地環(huán)境的三種地域分異規(guī)律。實際上，世界上的任何事物有其一般性，也有它的特 殊性。在地帶性分異規(guī)律的基礎(chǔ)上，陸地環(huán)境因為受到海陸分布、地形 起伏等因素的影響，也會出現(xiàn)一些不規(guī)律的現(xiàn)象，這種現(xiàn)象稱為非地帶性。例如，我們在初中地理中學(xué)過綠洲。還記得什么叫綠洲嗎？再比如，在南美洲的西海岸（太平洋沿岸），有一條狹長的（熱帶）荒漠帶，而缺少熱帶草原帶，熱帶雨林帶主要是分布在赤道以北地區(qū)。這主要是受大的地形起伏的影響。因為南美洲西部是一列高大的安第斯山脈，受其影響，兩邊的氣候狀況不同，所以就出現(xiàn)了分布規(guī)律不同的自然帶，這也是一種非地帶性現(xiàn)象。【總結(jié)】有規(guī)律分布的自然帶構(gòu)成了全球和諧的自然環(huán)境整體。自然帶之間錯綜復(fù)雜的、微妙的要素關(guān)系，有許多是人類還沒有認(rèn)識到的。因此，人類不能隨意去破壞任何哪怕是極微小的環(huán)節(jié)，也許它 帶來的影響會是全球性的。保護全球環(huán)境，人人有責(zé)。
人教版高中地理必修1營造地表形態(tài)的力量教案
【導(dǎo)入新課】一位在青藏高原上跋涉的旅行者，途中休息時從路邊巖層中隨手拿起一塊小石 頭玩賞時受小石子的紋路的吸引，他不禁仔細(xì)觀瞧，吃驚地發(fā)現(xiàn)這竟是一個古代海洋生物化石！近年來，人們在臺灣海 峽海底某些地方發(fā)現(xiàn)有古代森林的遺跡。這些發(fā)現(xiàn)告訴我們什么？ 【學(xué)生討論回答】略。 【教師總結(jié)概括】地殼和宇宙間一切物質(zhì)一樣，處在不停的運動變化之中。那么地表千姿百態(tài)的形態(tài)是如何營造的呢？這就是我們這節(jié)課要解決的課題【板書】第四章：地表形態(tài)的塑造 第一節(jié)：營造地表形態(tài)的力量【提問】哪位同學(xué)能夠例舉營造地表形態(tài)的力量改變地表面貌的實例？ （學(xué)生討論、回答問題。教師在副板書上一一記錄。） 【過渡】營造地表形態(tài)的力量具體劃分有很多種，但歸納起來看可以劃分為兩種，即內(nèi)力作用和外力作用，首先我們來看一下內(nèi)力作用．【板書】一、內(nèi)力作用 【指導(dǎo)讀書】請大家閱讀教材Ｐ74第一段和案例1，思考：