高中英语（目标分析+方案设计+自主导学）Unit 4 Period Ⅰ Period Ⅰ Previewing课件 新人教版必修3.ppt

theskyandtheearthwereatfirstoneblurredentity 混沌整体 likeanegg thenpanguwasbornintoit theseparationoftheskyandtheearthtookeighteenthousandyears theyangwhichwaslightandpurerosetobecomethesky andtheyinwhichwasheavyandmurky 黑暗的 sanktoformtheearth betweenthemwaspangu whowentthroughninechangeseveryday hiswisdomgreaterthanthatoftheskyandhisabilitygreaterthanthatoftheearth everydaytheskyrosetenfeethigher theearthbecametenfeetthicker andpangugrewtenfeettaller 教师用书独具演示 教学目标本课时主要是通过学生对学案所给出的内容的学习 了解本课文中所出现的词汇 初步了解课文以及相关的背景知识 就下一堂课对课文的全面理解起到一个铺垫作用 教学地位本单元的中心话题是 天文学 这篇文章采用了叙述性文体 按照时间顺序主要叙述了太阳系 地球上生命的起源和发展过程 宇宙大爆炸 可以说单元科学知识含量较高 更能激发学生的学习兴趣和好奇心 新课导入建议第一步 教师 imagineyouareascientistonastronomy whichstardoyouwanttostudymost 教师展示太阳系的图片 让同学们识别不同的行星 地球earth 水星mercury 金星venus 火星mars 木星jupiter 土星saturn 天王星uranus 海王星neptune 第二步 教师提问 amongtheseplanets theearthisreallyspecialforitslivinglife anddoyouknowhowthelifebeganontheearth 在同学们自由回答后 教师应指明的是 关于生命的起源 主要有宗教和科学两类不同的解释 教师可通过图片 文字等方式向学生介绍以下三方面的说法 1 中国古代关于人类起源的传说 chineselegends 如 盘古开天 和 女娲造人 等 2 西方圣经 biblicalstory 的 上帝造人说 3 较为公认的科学解释 scientificideas 宇宙大爆炸 说 演示结束 篇章结构阅读p25 26的reading部分 完成下列表格 语篇理解阅读p25 26的reading部分 从每题所给的3个选项中选择最佳答案1 whatistherightorderaccordingtothetext animalsappearedandspread theformingoftheearth plantsappeared differencebetweentheearthandotherplanets a b c 2 whatisthemaincausethatlifewasabletodevelopontheearthbutnotonotherplanets a theearthhadasolidshape b waterstayedontheearthbutnotonotherplanets c theearthwasnottoohotortoocold 3 fromthelastparagraphwecaninferthattheauthoris a confidentb sadc concerned 4 whatdoestheword they refertointhesentences itexplodedloudlywithfireandrock theywereintimetoproducecarbon nitrogen watervapourand a planets b gases c fireandrock 5 itcanbeinferredfromthetextthat a afterthe bigbang whatthedustwastobecomeremainedamysteryb theplantsmultipliedandfilledtheoceanswithoxygenc plantsplayedanimportantpartintheappearanceoftheanimals 答案 1 b2 b3 c4 c5 c 课文缩写theearthwasjustacloudof1 afterthe bigbang theearth2 loudlywithfireandrock theywerein3 toproducemanythings whichweretomaketheearth satmosphere astheearthcooleddown waterbegantoappearonitssurface itallowedtheearthtodissolve4 gases thenlifebegantodevelop thefirstsmallplants5 andfilledtheoceansandseaswithoxygen thisencouragedthe6 ofearlyshellfishandfish landanimalssuchasinsects reptilesanddinosaursandsoonappearedaftergreenplantsappeared smallcleveranimals7 allovertheearth theyareputtingtoo8 carbondioxideintotheatmosphere which9 heatfromtheearthintospace whetherlifewillcontinueontheearthformillionsofyearstocomewill10 onwhetherthisproblemcanbesolved 答案 1 dust2 exploded3 time4 harmful5 multiplied6 development7 spread8 much9 prevents10 depend 短语填空用方框内所给短语的适当形式填空intime layeggs givebirthto inone sturn prevent from beharmfulto1 abirdinthenestithasbuilt 2 doyouthinkwe llbetocatchthetraintogotoparis 3 nomatterwhatwillhappen nothingandnobodycantheplanbeingcarriedout 4 readingindimlightyoureyes 5 afterthesecondcompetitorwentoffthestage mysonwentontothestagetoperform 6 hetoldushappilythathiswifewouldababythenextweekandthathewouldbeafather 答案 1 layseggs2 intime3 prevent from4 isharmfulto5 inhisturn6 givebirthto 句型背诵1 theearthbecamesoviolentthatitwasnotclearwh