How life began on the earth

1、 Unit 4 Astronomy: Unit 4 Astronomy: the science of the starsthe science of the stars叶叶 娜娜 李广辉李广辉 解西淼解西淼 吕修华吕修华柳云泽柳云泽 陈欣欣陈欣欣 王尚伦王尚伦 尹春凤尹春凤王王 旭旭 刘刘 凯凯 孙孝雯孙孝雯 陈文文陈文文赵媛媛赵媛媛 卢广媛卢广媛 何光宇何光宇 王王 宁宁Words and expressions preview 1.喜欢喜欢(v.) _ 不喜欢不喜欢 _ 像像(prep) _ 不不 像像 _ 2.迷（迷（n）_迷惑的（迷惑的（adj.）_感到迷惑的感到迷惑的_ 3.伤害（

2、伤害（n/v）_有害的有害的 （adj.）_ 4.存在存在 _ 5. 以以 作为开始作为开始 _ 6.轮到某人轮到某人 _ 7.太阳系太阳系 _ 8.产生、分娩产生、分娩 _ 9.及及 时时 _ 10.阻止阻止 _likelikedislikeunlikepuzzlepuzzledpuzzlingin ones turnharmharmfulgive birth toin timeprevent fromsolar systembegin withexist To learn about how life began on the earth. 2. To improve the abilit

3、y of listening, reading and speaking. 3. To master language points in the passage. 4. To learn about humans impact on the earth and how to protect the earthThe Solar system水星水星地球地球金星金星火星火星木星木星土星土星海王星海王星天王星天王星How Life Began on the Earth ?How Life Began on the Earth ?DThe arrival of humans and their i

4、mpact(影响影响) on the earth. Skim the passage and match the main idea with each paragraph.Para. 1 The importance of water for life.BPara. 2 Para. 3 Para. 4 Para. 5 AThe formation(形成形成) of the earth.CA widely accepted theory about the formation of the universe.EThe development of plants and animals on t

5、he earth.Listen to the tape, then to tell true or false.Listening 1.Human beings have known the origin of the earth clearly so far.( )2.The appearance of water made it possible for plants and animals to live on the earth. ( )3.Plants first appeared on land and then in the water. ( )4.Dinosaurs exist

6、ed on the earth for over 140 thousand years. ( )5.It is human beings that are not looking after the earth very well and have caused global warming. ( ) Listen to the tape, then to tell true or false.Listening Listen to the tape, then to tell true or false.Listening 1.Human beings have known the orig

7、in of the earth clearly so far.( )2.The appearance of water made it possible for plants and animals to live on the earth. ( )3.Plants first appeared on land and then in the water. ( )4.Dinosaurs existed on the earth for over 140 thousand years. ( )5.It is human beings that are not looking after the

8、earth very well and have caused global warming. ( ) TFFTFPara.1 Para.2Para.3Para.4Para.5 A theory about how the universe was formedThe formation(形成）形成） of the earthThe importance of water for lifeThe development of plants and animalsThe arrival of humans and their effects on the earthPart1: The deve

9、lopment of the earthPart2:The development of life.Detailed ReadingPart.1 Part.1 The development of the earth The development of the earthPara 1-3 Para 1-3 The development of the earthThe development of the earthBig BangA solid globeAtmosphere The earthA cloud of dust The formation of the earth Why i

10、s water so important for the beginning of life? Because the continued presence of water allowed the earth to dissolve harmful gases and acids into oceans and seas.Part.2 The development of lifePart.2 The development of lifePara 4-5 Para 4-5 The development of lifeThe development of lifewaterPlants i

11、n the waterShellfish and fishPlants on land the formation of lifeInsects and amphibiansReptiles Dinosaurs Mammals They developed new methods of growing food, hunting and moving around. As time went by, they covered the earth and have become the most important animals on the planet.Man had evolved fr

12、om apes. Greenhouse effect But they are not taking care of the earth very well. What problem are humans causing? make the earth too hot put too much carbon dioxide into the atmosphereAs young people, what little things can we do for the earth?Whether life will continue on the earth depends on human

13、beings.Only if we care will we help,only if we help shall all be saved!唯有关心，我们才会行动；唯有关心，我们才会行动；唯有行动，生命才会有希望。唯有行动，生命才会有希望。1. be to do3. harmful 2. in timeCompetition in classRule： Please choose a number first.After the “big bang”, the earth was still just a cloud of _,it _loudly with fire and rock, w

14、hich were in time to produce the_, water vapour and other gases. Then _ began to appear on the earth. Fill in the blanks in 5 mins and retell the passage.dustexplodedcarbon dioxidewater _ in water are considered to be the earliest lives on the earth. The O2they supplied encouraged the lives of_. Slo

15、wly green plants grew on land, which were followed by _like insects & _. When the plants grew into_, _ appeared. Then _ developed but disappeared later, which made the rise of a totally different animal,_, possible, and finally _ spread all over the world.shell-fish and fishamphibiansforestsrept

16、ilesdinosaursmammalhumansThe small plantsland animalsHomework “What shall we do to protect our planet”2. Preview the grammar -Noun Clause1.Preview language points. （1） 表示将按计划或安排做某事表示将按计划或安排做某事 to do sth as plan or arrangement eg. We are to meet at the park tomorrow. 我们打算明天公园见面我们打算明天公园见面（2） 表示禁止、命令表示

17、禁止、命令 mustnt and command eg. You are not to go out without permission. 未经许可不许你外出未经许可不许你外出（3） 表示注定要表示注定要. destined to do sth eg. He was to succeed as he worked so hard. 因为他努力学习因为他努力学习, ,注定他要成功注定他要成功 （4） 表示表示“应该应该”,相当于相当于should eg. It is going to rain. What is to be done？ 天要下雨了，该怎么办呢？天要下雨了，该怎么办呢？ 重点词汇

18、和短语重点词汇和短语be to do1、what it was to become was uncertain until betweenSubjective clause 主语从句主语从句连词（连词（conjunction）wh-/how +陈述语序陈述语序当堂检测当堂检测1. The final examination _early July. A. is to be held B. is held C. is going to hold D. will be held重点词汇和短语重点词汇和短语解析：解析：表示将按计划或安排做某事表示将按计划或安排做某事 to do sth as pla

19、n or arrangement2、in time:(1)(1) 迟早、终于迟早、终于within an uncertain time or at an uncertain future time eg. You will succeed in time as long as you dont give up. 只要不放弃，你迟早会成功的只要不放弃，你迟早会成功的. .(2)(2) 及时及时without delay eg. You must go off now if you want to attend the meeting in time. 如果你想及时参加会议如果你想及时参加会议,

20、,就必须马上动身就必须马上动身. .重点词汇和短语重点词汇和短语归纳拓展归纳拓展on timeat a timeall the timeahead of timeat one timein no timeat timesthe first for /last time按时按时, ,准时准时每次每次, ,一次一次一直一直, ,始终始终提前提前, ,提早提早曾经曾经, , 一度一度立刻立刻, ,马上马上有时有时第一第一/ /最后一次最后一次重点词汇和短语重点词汇和短语 2012.2012.江苏高考江苏高考 1. - Thank God you are safe! - I stepped back,

21、 just _to avoid the racing car. A. in case B. in time C. in need D. in all 高考链接高考链接重点词汇和短语重点词汇和短语3、harmful adj 有害的有害的(1) (1) be harmful to 对对有害有害 = be bad for eg. It is harmful to drink too much alcohol. 过量饮酒对身体有害过量饮酒对身体有害. .(2)(2) harm n / v 伤害，损害伤害，损害 the action of damaging something or someone do

22、 harm to sb =do sb harm 对某人有害对某人有害 eg. Smoking does harm to your health. 吸烟对你的身体有害吸烟对你的身体有害. .do good to sb = do sb good 对某人有好处对某人有好处 拓展延伸拓展延伸重点词汇和短语重点词汇和短语当堂检测当堂检测 Everyone knows smoking is _to their health, but many people cant bear themselves away from it. A. harmful B. good C. helpful D. bad解析：解

23、析：be harmful to =be bad for对对有害有害 ； be good to对对.友好；友好； be helpful to 对对有帮助；有帮助；重点词汇和短语重点词汇和短语1 The manager want to see changes in the company, I am sure he will _. A. In particular B. in turn C. in charge D. in time解析：解析：经理希望看到公司的变化，我确信他迟早会看到的。经理希望看到公司的变化，我确信他迟早会看到的。In particular 尤其，特别；尤其，特别；in tur

24、n 依次，轮流；依次，轮流；in charge 负责；负责； in time 迟早，早晚迟早，早晚.1. As students, we _. A. wont smoke B. are not to smoke C. arent smoking D. dont smoke解析：解析： be to do 表示禁止做某事表示禁止做某事. The firemen were just _for rescue, so only a few people got hurt. A. at a time B. in time C. at times D. at one time解析：解析： A. at a t

25、ime每次每次,一次一次 B. in time 及时，准时及时，准时 C. at times 有时有时 D. at one time曾经、一度曾经、一度Playing computer games _. _. 玩电脑游戏对学生有害。玩电脑游戏对学生有害。does harm to students.does students harm.用用in time, on time填空填空The bus was late this morning, its usually_.I nearly forgot that it was Jims birthday, Fortunately, I remember

26、_.on timein time （ ）1 Insects and amphibians appeared. （ ）2 Dinosaurs appeared. （ ）3 The earth became a solid ball. （ ）4 Small plants grew on the water. （ ）5 Reptiles appeared. （ ）6 Plants began to grow on dry land. （ ）7 The earth was a cloud of dust. （ ）8 Water appeared on the earth. （ ）9 Shellfish

27、 and other fish appeared. （ ）10 The universe began with a “Big Bang”. （ ）11 Clever animals with hands and feet appeared. （ ）12 Mammals appeared.87564110392 Put the order of development of life into a time line. 12 11 1、 The American student studying in Beijing University speaks Chinese very fluently

28、 _ he were a native Chinese.Aever since Beven thoughCas though Dso that2、 The villagers collected money to set up a monument _ those who died in the great earthquake.Ain charge of Bin place ofCin need of Din memory ofThink about what you have read and make choices. You can discuss with your partners

29、.1. Why was the earth different from the other planets?3. What problem is caused by human beings?2. Why did the plants grow before the animals came?Detailed ReadingWhy was the earth different from other planets?A. It produced a lot of heat. B. The water remained on the earth.C .Water disappeared. D.

30、 It was the oldest planet.Why did the plants grow before the animals came?A. Animals needed plants to protect them from the sun. B. Plants provided oxygen for animals to breathe.C. Animals could hide from hunters in forest.D. It was easier for plants to grow.What problem is caused by human beings?A.

31、 They exist everywhere on the earth.B. They cause global warming.C. They find new methods of growing crops.D. They enjoy hunting and fishing.Time The earthSeveral billion years after the “Big Bang”Between 4.5 and 3.8 billion years agoa cloud of dusta solid globeexploded with fire and rockWater began

32、 to appearproduce C/N water vapor, etc.Stage.1 The development of the earth Stage.1 The development of the earth As the earth cooled downStage.2 The development of lifeStage.2 The development of lifeRead Para. 4-5 and fill in the blanks.456 7 8 910small plants in water insects reptilesamphibiansmamm

33、alsdinosaurs humansplantsanimalsgreen plants on landforestsshellfish and all sorts of fish321Evolution of life on the earthTime The earthSeveral billion years after the “Big Bang”Between 4.5 and 3.8 billion years agoa cloud of dusta solid globeexploded with fire and rockWater began to appearproduce

34、C/N water vapor, etc.Stage.1 The development of the earth Stage.1 The development of the earth As the earth cooled downHow life began on the earth“Big Bang”other bodies_ starsEarth: a cloud of _atomsdustThe development of the life on the eartha solid _the earths _other_Water: _ to the development of

35、 lifewater vapour nitrogen carbonextremely small _ on the surface of the waterglobegasesatmospherefundamentalplants 地球地球 _ 木星木星 _ 火星火星 _ 水星水星 _E.海王星海王星 _F. 土星土星 _G. 天王星天王星 _H. 金星金星 _EarthJupiterMarsMercuryNeptuneSaturnUranusVenusThe Solar SystemThe Solar SystemCan you name the eight planets? 辨辨 析析fo

36、r the first /last time 第一第一/ /最后一次最后一次the first /last time 第一第一/ /最后一次最后一次介词短语介词短语 时间状语时间状语时间名词时间名词 时间状语从句时间状语从句eg. Ive been here for the first time. 我是第一次来这里我是第一次来这里 I fell in love with her the first time I saw her. 一见钟情一见钟情 注意：时间名词前面没有介词注意：时间名词前面没有介词重点词汇和短语重点词汇和短语拓展延伸拓展延伸时间名词引导时间状语从句时间名词引导时间状语从句the last timethe first time every/each timethe moment/ minute/second that (=as soon as)最后一次最后一次第一次第一次每次每次一一就就重点词汇和短语重点词汇和短语当堂检测当堂检测1.-I was disappointed in _ time when I didnt pass the examinations. - Dont be so discouraged. Youll be successful in _ time. A. /, / B