集體備課教案-wenkub
2024-10-07 00 本頁面
【正文】 中檢驗(yàn)二氧化錳對氯酸鉀分解起催化作用二氧化錳氯酸鉀氯化鉀+氧氣加熱觀察高錳酸鉀是什么顏色？當(dāng)它加熱時能否產(chǎn)生氧氣？高錳酸鉀（KMnO4）錳酸鉀（K2MnO4）+二氧化錳（MnO2）+氧氣（O2）[討論] 上述三個制氧氣的反應(yīng)與化合反應(yīng)有什么不同？四、分解反應(yīng)的概念分解反應(yīng)就是一變多的反應(yīng)。教學(xué)難點(diǎn)催化劑的概念和催化作用。教學(xué)時間: 1 lesson 教學(xué)方法:game、performance、TPR教學(xué)過程: Step 1 warming up:GreetingReview some words: happenhappened washwashed playplayed listenlistened gowent seesaw havehad fall overfell over and matchStep 2 Lead in and new lesson:談話導(dǎo)入 T:Hello,…What did you do last Sunday? S:…T: Last Sunday was my unlucky went to Qicheng read an interesting book in the I didn’t walk I bumped my head on a it didn’t hurt.(teach”bump”詞組bump my head句子I bumped my head)T指一生Oh,look at…’s happened to you? S: I cut my finger.(引出問句板書)分組讀問答句分排問答 What happened to you? I bumped my cut my 、TLook at the picture(課件)what happened to this girl? She hurt her knee.(teach”knee”,kneesee,tree,three,sweets…詞組句子She hurt her hurthurt,總結(jié)三個特殊動詞過去式)T假裝摔倒OhI fell hurt my 并板書TI have a chant for at the , head, I bumped my head….(拍手chant,做動作)師生表演對話示范,再同桌對話 TOuchSWhat happened to you? T: I cut my 、TIf you bumped your head, where will you go? Now let’s go to the hospital to see three unlucky happened to them? a listen and line down the 4 new words b listen and repeat c follow the teacher then read together d find the past tence e 分角色讀再4人小組表演讀板書補(bǔ)充fell over, fell off the bike, hurt my nose…T: Look at the screen, what happened to this boy? S:He bumped his at your book, choose one to 小結(jié)What have we learnt?(安全教育)StepPractice: Activity book exercise 1,2StepHomeworka、copy the 4 new words b、copy the dialogue 板書設(shè)計Module 9 Unit 2 I bumped my happened to you?bumped my headcut my fingerhurt my knee第二篇：集體備課教案集體備課教案主備人備課組成員（九年級組)課題課題３制取氧氣（第一課時）授課課時教學(xué)目標(biāo)(學(xué)習(xí)目標(biāo))了解實(shí)驗(yàn)室制取氧氣的主要方法和原理，初步了解通過化學(xué)實(shí)驗(yàn)制取新物質(zhì)的方法。激發(fā)學(xué)生學(xué)習(xí)語言的興趣培養(yǎng)合作意識與創(chuàng)新精神。教學(xué)重難點(diǎn): What happened to you ? I… :bump knee cut finger學(xué)生分析學(xué)生通過前面的學(xué)習(xí),已經(jīng)初步掌握了過去時態(tài)的用法,并了解了動詞過去式的規(guī)則變法,能進(jìn)行一般的問答。認(rèn)識分解反應(yīng)、催化劑及催化作用。教學(xué)用具試管、藥匙、過氧化氫溶液、二氧化錳、高錳酸鉀、氯酸鉀等、鐵架臺、集氣瓶、木炭、鐵絲、木條、砂紙教學(xué)方法(學(xué)習(xí)方法)實(shí)驗(yàn)探究法教學(xué)過程導(dǎo)入新課：空氣中約有1/5體積的氧氣，但是在有些情況下需要純凈的氧氣，如何獲得呢？新課講解：一、用分解過氧化氫溶液制取氧氣的反應(yīng)原理[實(shí)驗(yàn)1]（1）在試管中加入過氧化氫溶液，將帶火星的木條伸入試管，觀察木條是否燃燒？（2）向上述加入少量的二氧化錳，把帶火星的木條伸入試管，觀察有什么現(xiàn)象發(fā)生？[現(xiàn)象]：（1）木條不復(fù)燃（2）木條復(fù)燃二氧化錳過氧化氫 水+氧氣過氧化氫在常溫下能緩慢分解成水和氧氣討論：用過的二氧化錳能否再次使用？備注(補(bǔ)充)[實(shí)驗(yàn)2]向用過的二氧化錳中再次加入過氧化氫溶液，觀察能否再次使帶火星的木條復(fù)燃？[現(xiàn)象]帶火星的木條復(fù)燃以上實(shí)驗(yàn)可重復(fù)多次，好象二氧化錳永遠(yuǎn)用不完。即AB+C四、總結(jié)反思利用高錳酸鉀加熱和過氧化氫、二氧化錳混合制氧氣是實(shí)驗(yàn)室制取氧氣的主要方法，應(yīng)注意它們間的異同點(diǎn)，記住各物質(zhì)的化學(xué)符號。體驗(yàn)數(shù)學(xué)的簡潔美，增強(qiáng)學(xué)生的數(shù)學(xué)情感。）今天，咱們試著從數(shù)學(xué)的角度研究字母。）師：你們
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