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新人教版高中英語(yǔ)必修2Unit 3 The Internet-Listening &Speaking＆Talking教案一
Listening and Speaking introduces the topic of “ask about online habits”. Many middle school students have been surfing the Internet for many years, but what they do with the Internet and how much time they spend every day may not be very clear to themselves, nor to other students. This section allows students to investigate their peers' Internet use, which is conducive to their mutual understanding and understanding of the Internet. It can also help them reflect on their own online behavior, learn from other people's good online habits, and get rid of their bad online behavior.The listening text of this section is an investigation interview. The investigators interview specific groups with the same questions to obtain information, so as to understand their views, practices or attitudes on this issue. There are two specific questions: “how much time do you spend online every day? What do you usually do online?”. The answers of the three respondents provide rich and different information, and achieve the purpose of the investigators. The oral discourse structure of survey interviews generally includes greeting and explaining the purpose of the interview, presenting the interview questions and the respondents' answers. Listening and Talking introduces the theme of “choosing the right application ". Listening text is a conversation between Laura and Xiao Bo. In this part of listening, “oink”； “piggy bank” may cause the students' hearing comprehension limitation. Oink refers to sound word and pig's sound. So, add some oink to my piggy bank is often used to describe "making a little money".1. Guide students to understand the content of listening texts in terms of listening for definitions.2. Cultivate students' ability to define words and understand an investigation interview.
新人教版高中英語(yǔ)必修2Unit 3 The Internet-Reading and Thinking教案二
Q5：What's Jan's next goal?Her next goal is to start a charity website to raise money for children in poor countries.Q6：What can we learn from her experiences?We learn that when we go through tough times, we can find help and support from other people online. We learn that we can feel less lonelyStep 5: While reading---rethinkingQ1: What is Jan’s attitude to the Internet ?Thankful/Grateful, because it has changed her and her life.Q2: What writing skills is used in the article ?Examples(Jan’s example, the 59-year-old man’s and the 61-year-old woman’s example)Q3: Can you get the main idea of the article ?The Internet has changed Jan’s life/Jan’s life has been changed by the Internet.Step 6 Post reading---Retell the storyMuch has been written about the wonders of the World Wide Web. There are countless articles (1)telling(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)more(much) for people than simply make life more convenient. People’s lives (3) have been changed(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)stuck(stick) at home with only her computer to keep (5)her(she) company. She joined an online group (6)where she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)benefits(benefit). She was so inspired (8)that she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)for children in poor countries. Jan’s life has been (10)greatly(great) improved by the Internet.
新人教版高中英語(yǔ)必修2Unit 3 The Internet-Reading and Thinking教案一
Paragraph 3. Jan decided to start an IT club to teach old people how to use computers and the Internet. Paragraph 4. Jan has started taking online classes to learn more about how to use the Internet to make society better. Paragraph 5. Jan’s life has been greatly improved by the Internet. Step 5: Critical thinking:(1)How do you arrange your time spent on study and the Internet? Is it reasonable? I usually surf the Internet using my mobile phone for only an hour after class, and it is reasonable for me.(2)What are your online activities? Are they safe? I chat with my friends, read news and play games. I never give away my private information so I think they are safe.Step 4: summary Much has been written about the wonders of the World Wide Web. There are countless articles (1)______(tell) us how the Internet has made our lives more convenient. But the Internet has done a lot (2)_____(much) for people than simply make life more convenient. People’s lives (3) _________________(change) by online communities and social networks so far. Take Jan for example, who developed a serious illness that made her (4)_____(stick) at home with only her computer to keep (5)___(she) company. She joined an online group (6)______ she could share problems, support and advice with others. She considered the ability to remove the distance between people as one of the greatest (7)_______(benefit). She was so inspired (8)____ she started an IT club in which many people have been helped. She has started to learn more about how to use the Internet to make society better. Her next goal is to start a charity website to raise money (9)___ children in poor countries. Jan’s life has been (10)______(great) improved by the Internet. Step 5 Homework:Review what we have learned and find out the key language points in the text.
新人教版高中英語(yǔ)必修2Unit 3 The Internet-Reading for Writing教案二
8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。 Step 8 Writing---the articleHow to stay safe in the online chat roomToday I thought I’d blog about a question that has been asked many times--- how do you stay safe online and avoid bad experiences in the online chat room ? I’m not an expert, but many years as a blogger have taught me a thing or two.First of all, there’s the golden rule of the Internet: keep out of what makes you uneasy. Don’t post comments or click on anything. Second, protect your privacy. Don’t give out too much private information like your address, phone numbers, the ID numbers, etc. Third, be polite. If you are polite to others on the Internet, you won’t be attacked in normal situation. Finally, don’t believe in others easily and never meet someone you met online alone. It is very dangerous.Have you had any bad experiences online, or do you have some good advice for staying safe? Post your comments below!Step 9 Pair workExchange drafts with a partner. Use this checklist to help your partner revise his/her draft.1. Does the writer tell the reader what he/she know about the topic ?2. Are the tips and suggestions well organised ?3. Has the writer defined the new words ?4. Does the author include examples, comparison, or explanations ?5. Does the writer end by asking readers to leave comments and/or suggestions ?6. Can you find any grammar or spelling mistakes.Step 6 HomeworkPut up your revised draft in the classroom or read it to your class.
新人教版高中英語(yǔ)必修2Unit 3 The Internet-Reading For Writing教案一
⑦identity theft 身份盜竊⑧chat room 聊天室⑨draft your blog post 起草博客帖子⑩post embarrassing photos 張貼尷尬照片 【話題句式】 1. How do you stay safe online and avoid bad experiences on the Internet? 你如何在網(wǎng)上保持安全, 避免在網(wǎng)上的不良經(jīng)歷? 2. I’m not an expert, but many years as a blogger have taught me a thing or two. 我不是專(zhuān)家, 但作為一個(gè)博主, 我已經(jīng)學(xué)了好幾年了。 3. If you see or read something that makes you feel uncomfortable, leave the site immediately. 如果你看到或讀到一些讓你覺(jué)得不舒服的東西, 立即離開(kāi)這個(gè)網(wǎng)站。4. Don’t give out your address or phone number. 別告訴別人你的地址或電話號(hào)碼。 5. Identity theft is a common and serious problem. 身份盜竊是一個(gè)常見(jiàn)而嚴(yán)重的問(wèn)題。6. Being online is no excuse for being rude, and you don’t want to become a target for a troll or cyberbully. 上網(wǎng)并不是無(wú)禮的借口, 你也不想成為發(fā)挑釁帖子的人或網(wǎng)絡(luò)惡霸的目標(biāo)。 7. Trolls often use several false names so that they can stay on a site. 發(fā)挑釁帖子的人經(jīng)常使用幾個(gè)假名, 這樣他們就可以留在一個(gè)網(wǎng)站上。8. However, the more polite you are, the less likely it is you will be attacked. 然而, 你越有禮貌, 你被攻擊的可能性就越小。
新人教版高中英語(yǔ)必修3Unit 2 Morals and Virtues教學(xué)設(shè)計(jì)二
Activity 41. Students complete the task of activity 4, then teachers and students check the answers. 2. The teacher organized the students to work together and asked them to use the tables and mind maps sorted out before to retold the important choices in Lin Qiaozhi's life and their resultsStep 5 Language points1. The teacher asks the students to read the text carefully, find out the core words and long and difficult sentences in the text and draw lines, understand the use of vocabulary, and analyze the structure of long and difficult sentences. 2. The teacher explains and summarizes the usage of core vocabulary and asks the students to take notes. 3. The teacher analyzes and explains the long and difficult sentences that the students don't understand, so that the students can understand them better. Step 6 Homework1. Read the text again, in-depth understanding of the text; 2. Master the use of core vocabulary and understand the long and difficult sentences. 3. Complete relevant exercises in the guide plan. 1、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生是否理解和掌握閱讀文本中的新詞匯的意義與用法；2、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否結(jié)合文本特點(diǎn)總結(jié)林巧稚的人生原則和人格品質(zhì)特征；3、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否針對(duì)人生抉擇發(fā)表自己的看法；能否全面地、客觀地、理性地看待問(wèn)題，進(jìn)而對(duì)道德和人性有更加深入的思考和理解。
新人教版高中英語(yǔ)必修3Unit 2 Morals and Virtues教學(xué)設(shè)計(jì)三
The joke set her crying.這個(gè)玩笑使她哭起來(lái)。Step 5 ReadingActivity 31. Students read the small text in activity 3. The teacher provides several small questions to check whether students understand the content of the text and the ideographic function of the -ing form in the text.*Where are those people?*Why did Dr Bethune come to China?*How did he help the Chinese people during the war?*What did Chairman Mao Zedong say about him?2. Ss try to rewrite some sentences using the -ing form. Then check the answers. When checking the answers, the teacher can ask different students to read the rewritten sentences and give comments.Answers:1. he became very interested in medicine, deciding to become a doctor.2. …after hearing that many people were dying in the war.3. Helping to organise hospitals, he taught doctors and nurses, and showed people how to give first aid./ He helped to organise hospitals, teaching doctors and nurses, and showing people how to give first aid.4. …praising Dr Bethune as a hero to be remembered in China.Step 6 PracticeActivity 4Students complete grammar activities 2 and 3 on page 69 of the workbook.Step 6 Homework1. Understand and master the functions and usage of the -ing form;2. Finish the other exercises in Using structures.1、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生是否理解和掌握動(dòng)詞-ing形式作賓語(yǔ)補(bǔ)足語(yǔ)語(yǔ)和狀語(yǔ)語(yǔ)的功能和意義；2、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否正確使用動(dòng)詞-ing形式描述人物的行為、動(dòng)作及其經(jīng)歷；3、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否獨(dú)立完成練習(xí)冊(cè)和導(dǎo)學(xué)案中的相關(guān)練習(xí)。
新人教版高中英語(yǔ)必修3Unit 2 Morals and Virtues教學(xué)設(shè)計(jì)四
3.Teachers ask different groups to report the answers to the questions and ask them to try different sentence patterns.The teacher added some sentence patterns for students to refer to when writing.Step 4 Writing taskActivity 51.Write the first draft.Students first review the evaluation criteria in activity 5, and then independently complete the draft according to the outline of activity 4, the answers to the questions listed in the group discussion and report, and the reference sentence pattern.2.Change partners.The teacher guides the students to evaluate their partner's composition according to the checklist of activity 5 and proposes Suggestions for modification.3.Finalize the draft.Based on the peer evaluation, students revise their own compositions and determine the final draft.Finally, through group recommendation, the teacher selects excellent compositions for projection display or reading aloud in class, and gives comments and Suggestions.Step 5 Showing writingActivity 5T call some Ss to share their writing.Step 6 Homework1. Read the passage in this section to better understand the passage.2. Carefully understand the hierarchical structure of the article, and deeply understand the plot of the story according to the causes, process and results;3. Independently complete the relevant exercises in the guide plan.1、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生是否理解和掌握閱讀文本中的新詞匯的意義與用法；2、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否通過(guò)人物言行的對(duì)比分析道德故事的深層內(nèi)涵；3、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否根據(jù)故事的起因、經(jīng)過(guò)和結(jié)果來(lái)深入理解故事的情節(jié)，從而了解文章的層次結(jié)構(gòu)；4、結(jié)合現(xiàn)實(shí)生活案例發(fā)表自己的見(jiàn)解和看法,寫(xiě)一篇觀點(diǎn)明確、層次分明的故事評(píng)論。
新人教版高中英語(yǔ)必修3Unit 2 Morals and virtues教學(xué)設(shè)計(jì)一
(2) students are divided into groups according to the requirements of activity 3. Each student shares a story of personal experience or hearing-witnessing kindness, and then selects the most touching story in the group and shares it with the whole class. Before the students share the story, the teacher can instruct them to use the words and sentence patterns in the box to express. For example, the words in the box can be classified:Time order: first of all, then, after that, later, finally logical relationship :so, however, although, butTeachers can also appropriately add some transitional language to enrich students' expression:Afterwards, afterwards, at last, in the end, eventuallySpatial order: next to, far from, on the left, in front ofOtherwise, nevertheless, as a result, therefore, furthermore, in addition, as well asSummary: in a word, in short, on the whole, to sum up, in briefStep 8 Homework1. Understand the definition of "moral dilemma" and establish a correct moral view;2. Accumulate vocabulary about attitudes and emotions in listening texts and use them to express your own views;3. Complete relevant exercises in the guide plan.1、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否理解理解“道德困境”的定義；2、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否通過(guò)說(shuō)話人所表達(dá)的內(nèi)容、說(shuō)話的語(yǔ)氣、語(yǔ)調(diào)等來(lái)判斷其態(tài)度和情緒；3、通過(guò)本節(jié)內(nèi)容學(xué)習(xí)，學(xué)生能否針對(duì)具體的道德困境發(fā)表自己的看法和見(jiàn)解，能否掌握聽(tīng)力理訓(xùn)練中的聽(tīng)力策略。
大班游戲教案：捕小魚(yú)小游戲
二、活動(dòng)重點(diǎn)難點(diǎn)： 幼兒在活動(dòng)中能遵守游戲的規(guī)則。 三、材料與環(huán)境創(chuàng)設(shè) 戶外塑膠地 四、設(shè)計(jì)思路： 在平時(shí)發(fā)現(xiàn)我班的孩子特別的活潑好動(dòng)，最喜歡玩的就是抓人的游戲，但我也發(fā)現(xiàn)個(gè)別幼兒不知道怎樣逃避別人的追趕，沒(méi)有一定的技能和技巧。針對(duì)孩子們的這一興趣和需要，我開(kāi)展了這次活動(dòng)。
幼兒園中班安全游戲：十只小貓咪
活動(dòng)準(zhǔn)備： 1、教學(xué)掛圖：《十只小貓咪》。 2、36K卡紙，水彩筆若干?；顒?dòng)過(guò)程：1、聽(tīng)《十只小貓咪》的故事，初步知道在生活、活動(dòng)中容易發(fā)生的事情。教師出示掛圖講故事。教師：這些小貓都做了些什么事情？結(jié)果怎么樣？
小班音樂(lè)游戲教案：小鴨和小雞
2、通過(guò)手偶表演，感知歌曲的內(nèi)容和節(jié)奏； 3、喜歡手指游戲歌，能與琴聲協(xié)調(diào)一致地唱歌?！ ?活動(dòng)準(zhǔn)備： 小雞和小鴨手偶各一個(gè) 幼兒用書(shū)熱人手一本，實(shí)物投影儀 活動(dòng)過(guò)程： 一、音樂(lè)模仿游戲《動(dòng)物在農(nóng)場(chǎng)》導(dǎo)入，激發(fā)幼兒模仿動(dòng)物叫聲的興趣 （1）依次以小牛、小貓、小狗、小豬、小雞、小鴨的叫聲進(jìn)行游戲 （2）小鴨和小雞在農(nóng)場(chǎng)里見(jiàn)面了，它們會(huì)怎么做呢？ 鼓勵(lì)幼兒大膽猜測(cè)后觀看幼兒用書(shū) 二、觀察圖書(shū)內(nèi)容，理解歌詞 （1）看，書(shū)上有誰(shuí)呀？（小鴨和小雞） （2）它們?cè)诟墒裁囱?？（唱歌，做游戲） ?（3）你知道它們是怎么唱歌的嗎？（呷呷呷，唧唧唧，呷呷呷，唧唧唧）
大班體育教案：我和報(bào)紙玩游戲
2、通過(guò)游戲活動(dòng)，進(jìn)一步發(fā)展幼兒的平衡協(xié)調(diào)的能力、跳的能力以及各種運(yùn)動(dòng)能力。3、培養(yǎng)幼兒參與活動(dòng)的興趣，以及活動(dòng)中愉快的情緒體驗(yàn)。 活動(dòng)重點(diǎn)：發(fā)展幼兒運(yùn)動(dòng)能力 活動(dòng)難點(diǎn)：培養(yǎng)幼兒創(chuàng)造思維能力活動(dòng)準(zhǔn)備：廢舊報(bào)紙若干，將每張報(bào)紙卷成小棒。 音樂(lè)材料，磁帶、錄音機(jī)。 活動(dòng)過(guò)程： 一、 導(dǎo)入活動(dòng)： 教師帶領(lǐng)幼兒跑步進(jìn)入活動(dòng)場(chǎng)地，做熱身操。 教師：孩子們，今天教師給大家?guī)?lái)了禮物。瞧瞧這是什么？（出示用報(bào)紙做的小棒）天氣真好，我們拿著小棒一起到外面去玩吧。（引導(dǎo)幼兒跑步進(jìn)入場(chǎng)地） 音樂(lè)：幼兒一起活動(dòng)身體，做熱身操。（反復(fù)兩遍） 二、 游戲活動(dòng)：我和報(bào)紙做游戲。 １、 導(dǎo)入部分。 教師請(qǐng)幼兒將報(bào)紙打開(kāi)，在場(chǎng)地在自由坐下：“孩子們，剛才大家跳舞跳得真好，我們坐下休息一下吧”。 ２、 引導(dǎo)幼兒討論：“報(bào)紙可以怎么玩”？ 教師：“咦，孩子們，剛才我們的小棒怎么不見(jiàn)了”？（幼兒回答） 教師：“報(bào)紙可真有趣啊，我們想想報(bào)紙可以怎么玩”？（幼兒自由討論） 教師小結(jié)幼兒討論情況：報(bào)紙有好多種玩法，有的小朋友說(shuō)可以做成球來(lái)踢著玩，有的說(shuō)可以當(dāng)成小河來(lái)跳著玩，孩子們可真聰明，現(xiàn)在我們就比一比，看誰(shuí)和報(bào)紙玩得最高興。
幼兒園體育游戲教案：調(diào)皮的球
2、能與同伴合作共同玩球。[活動(dòng)準(zhǔn)備]1、大小不一，種類(lèi)不同的球若干，如排球、乒乓球、網(wǎng)球、籃球、足球、皮球等。2、藝術(shù)體操——球操的錄像帶、磁帶等。3、自制獎(jiǎng)牌若干。[活動(dòng)過(guò)程] 一、開(kāi)始部分 熱身運(yùn)動(dòng)，幼兒隨音樂(lè)《健康歌》做活動(dòng)身體關(guān)節(jié)的動(dòng)作?！ 《?、基本部分1、談話：你喜歡什么樣的運(yùn)動(dòng)？幼兒自由發(fā)言（啟發(fā)幼兒說(shuō)出去玩球）今天我們來(lái)看一段球操表演?！ 〔シ配浵?，幼兒邊看教師邊講解。引導(dǎo)幼兒注意觀看體操運(yùn)動(dòng)員怎樣用身體控制住小小的、會(huì)滾動(dòng)的球。2、我們的活動(dòng)室里有許多球，我們?nèi)フ乙徽摇⑼嬉煌婧貌缓?？每個(gè)幼兒拿一個(gè)球，請(qǐng)幼兒自由模仿，滿足幼兒的模仿欲望。
幼兒園游戲教案：迷宮《營(yíng)救小白兔》
活動(dòng)目標(biāo)：1、鞏固對(duì)食草動(dòng)物和食肉動(dòng)物的了解。2、在迷宮中體會(huì)方位的靈活性和多變性。3、培養(yǎng)觀察力和分析判斷能力，感受活動(dòng)所帶來(lái)的樂(lè)趣。活動(dòng)準(zhǔn)備：1、小羊、馬、長(zhǎng)頸鹿、、牛等食草動(dòng)物圖片2、老虎、獅子、獵豹、黑熊、野豬等食肉動(dòng)物圖片。3、大象的圖片分為四片，分別放在食草動(dòng)物的家中?；顒?dòng)過(guò)程；1、尋找小動(dòng)物（熟悉迷宮） 小朋友，森林里的小動(dòng)物們正在迷宮里玩呢，剛才老師聽(tīng)說(shuō)大灰狼正在迷宮找吃的呢，我們趕快把它們找回來(lái)好嗎？（幼兒自由到迷宮里尋找小動(dòng)物，進(jìn)行熟悉迷宮的活動(dòng)。）
大班游戲教案：有趣的多米諾骨牌
教育目標(biāo)1. 引導(dǎo)幼兒初步了解力的作用之可以使靜止的物體動(dòng)起來(lái)，以及使運(yùn)動(dòng)的物體靜止的方法。 2. 培養(yǎng)幼兒大膽探索、仔細(xì)觀察和主動(dòng)積極的學(xué)習(xí)態(tài)度，體驗(yàn)合作的樂(lè)趣。3. 培養(yǎng)幼兒對(duì)科學(xué)的興趣。4. 培養(yǎng)幼兒的耐力和毅力?；顒?dòng)準(zhǔn)備：多米諾骨牌、推牌錄像、有關(guān)力作用的玩具若干
幼兒園小班游戲教案：老鷹捉小雞
活動(dòng)目標(biāo)：1、訓(xùn)練幼兒走障礙物、平衡、立定跳遠(yuǎn)和快速跑的技能。2、發(fā)展幼兒動(dòng)作的靈敏性和反應(yīng)能力，學(xué)會(huì)躲閃。3、培養(yǎng)幼兒對(duì)體育活動(dòng)的興趣?；顒?dòng)準(zhǔn)備： 小雞頭飾若干，老鷹、母雞頭飾各一個(gè)，音樂(lè)帶物，雞蛋包裝盒，皺紙，“房子”四間,自制障礙. 活動(dòng)過(guò)程：
人教版新課標(biāo)高中物理必修2動(dòng)能和動(dòng)能定理教案2篇
二、課堂教學(xué)（課前由科代表發(fā)回預(yù)習(xí)學(xué)案）1、教師根據(jù)預(yù)習(xí)學(xué)案檢查結(jié)果提出問(wèn)題（用多媒體展示），引導(dǎo)全班討論（重點(diǎn)討論：①、為什么動(dòng)能的表達(dá)式一定是 mV2 ？你如何得出這個(gè)結(jié)論？②、力在一個(gè)過(guò)程中對(duì)物體所做的功，和物體在這個(gè)過(guò)程中動(dòng)能的變化量有什么關(guān)系？你如何得出這個(gè)結(jié)論？這個(gè)做功的力和F=ma中的力F有什么關(guān)系）。有困難的小組應(yīng)及時(shí)問(wèn)老師。老師在這個(gè)過(guò)程中巡視指導(dǎo)。2、學(xué)生自主閱讀課文“7 動(dòng)能和動(dòng)能定理”中的“動(dòng)能的表達(dá)式”，然后完成如下練習(xí)（教師在此過(guò)程中巡視指導(dǎo)）：2.1嘗試推出動(dòng)能的表達(dá)式（鼓勵(lì)會(huì)推導(dǎo)的同學(xué)積極上臺(tái)板演，老師引導(dǎo)討論）。2.2寫(xiě)出動(dòng)能的小結(jié)（認(rèn)真閱讀教材p66倒數(shù)第二段、第三段，結(jié)合你推導(dǎo)動(dòng)能表達(dá)式的過(guò)程，認(rèn)真思考后四人一組討論：①、動(dòng)能是矢量還是標(biāo)量？②、動(dòng)能的單位是什么？③、你認(rèn)為應(yīng)從哪幾方面來(lái)理解動(dòng)能？）
人教版新課標(biāo)高中物理必修2生活中的圓周運(yùn)動(dòng)教案2篇
思考：洗衣機(jī)脫水時(shí)轉(zhuǎn)速高時(shí)容易甩干衣物，還是轉(zhuǎn)速低時(shí)容易甩干衣物？(2) 制作棉花糖的原理內(nèi)筒與洗衣機(jī)的脫水筒相似，里面加入白砂糖，加熱使糖熔化成糖汁。內(nèi)筒高速旋轉(zhuǎn)，黏稠的糖汁就做離心運(yùn)動(dòng)，從內(nèi)筒壁的小孔飛散出去，成為絲狀到達(dá)溫度較低的外筒，并迅速冷卻凝固，變得纖細(xì)雪白，像一團(tuán)團(tuán)棉花。5.離心現(xiàn)象的防止在水平公路上行駛的汽車(chē)，轉(zhuǎn)彎時(shí)所需的向心力是由車(chē)輪與路面的靜摩擦力提供的。如果轉(zhuǎn)彎時(shí)速度過(guò)大，所需向心力F大于最大靜摩擦力Fmax，汽車(chē)將做離心運(yùn)動(dòng)而造成交通事故。因此，在公路彎道處，車(chē)輛行駛不允許超過(guò)規(guī)定的速度。當(dāng)高速轉(zhuǎn)動(dòng)的砂輪或者飛輪內(nèi)部分子間相互作用力不足以提供所需向心力時(shí)，離心運(yùn)動(dòng)就會(huì)使他們破裂，甚至釀成事故。
人教版新課標(biāo)高中物理必修1物理學(xué)與人類(lèi)文明教案2篇
1. 課前觀看視頻《物理學(xué)與人類(lèi)文明》2. 分組討論，派代表發(fā)言，談學(xué)習(xí)感受。主要是物理的地位，物理的學(xué)習(xí)方法。3. 高中物理與初中物理在內(nèi)容和方法上的區(qū)別高中物理除了現(xiàn)象、概念和規(guī)律之外還應(yīng)該關(guān)注研究問(wèn)題的方法，學(xué)會(huì)從先想到抽象，從定性到定量研究問(wèn)題，學(xué)會(huì)用數(shù)學(xué)方法解決物理問(wèn)題，學(xué)會(huì)實(shí)驗(yàn)探究，學(xué)會(huì)獨(dú)立分析問(wèn)題解決問(wèn)題的思維習(xí)慣。4. 高中物理學(xué)習(xí)的基本要求高中物理學(xué)習(xí)應(yīng)該“重視實(shí)驗(yàn)，勤于思考”和“經(jīng)歷過(guò)程，體驗(yàn)方法”。高中物理學(xué)習(xí)與初中物理學(xué)習(xí)雖然有一定區(qū)別，但也不是孤立的，要繼續(xù)堅(jiān)持初中物理學(xué)習(xí)中積累的學(xué)習(xí)方法和體會(huì)，重視從正反兩個(gè)方面加以總結(jié)和提煉，做到：（1） 認(rèn)真閱讀，學(xué)會(huì)自學(xué)要學(xué)好物理，就要認(rèn)真閱讀課本。閱讀課本是要抓住關(guān)鍵詞語(yǔ)，弄清語(yǔ)句間的邏輯順序和因果關(guān)系，領(lǐng)會(huì)文章段落所表達(dá)的物理內(nèi)容，掌握課本敘述物理問(wèn)題的表達(dá)方法。