book3unit4reading

1、Unit4 ReadingHOW LIFE BEGAN ON THE EARTHA Quiz Game 1. How old is the earth? A. About 3.5 billion years B. About 4.5 billion yearsA. About 3.5 billion years B. About 4.5 billion years C. About 5.5 billion years D. About 6.5 billion years C. About 5.5 billion years D. About 6.5 billion years 2. _of t

2、he earth surface is covered by water. A. 20% B. 30% C. 50% D. 70% A. 20% B. 30% C. 50% D. 70% 3.How many planets are there in the Solar System? A. 6 B. 7 C. 8 D. 9A. 6 B. 7 C. 8 D. 9 4.What is the total population of humans on the earth? A. About 3.5 billion B. About 4.5 billionA. About 3.5 billion

3、B. About 4.5 billion C. About 5.5 billion D. About 6.5 billion C. About 5.5 billion D. About 6.5 billion 5 How long does the rotation (自转自转) of the earth take? A. 12 hours B. 24 hours C. a month D. 365 A. 12 hours B. 24 hours C. a month D. 365 daysdays6. Which continent is the smallest? A. Africa B.

4、 North America A. Africa B. North America C. South America D. Oceania C. South America D. Oceania 7. On what day is the Earth day celebrated? A. April 22 B. May 4 A. April 22 B. May 4 C. August 21 D. November 11 C. August 21 D. November 118. Which ocean is the largest? A. The Pacific Ocean B. The Ar

5、ctic Ocean A. The Pacific Ocean B. The Arctic Ocean C. The Indian Ocean D. The Atlantic Ocean C. The Indian Ocean D. The Atlantic Ocean9. Which country has the largest area? A. Canada B. China C. Russia D. U.S.AA. Canada B. China C. Russia D. U.S.Aastronomy biochemistry geophysics medicine_ the scie

6、ntific study of treatment of diseases and injures_ the study of the chemistry of living things_ the scientific study of the earths atmosphere, oceans and climate_ the scientific study of objects in space, such as planets, stars, comets and “black holes”astronomymedicinebiochemistrygeophysicsWarming

7、up I Fill in the blanks(2m) What do you know about astronomy? the Milky Way 太阳系太阳系the Solar System八大行星八大行星你知道吗？你知道吗？海王星海王星 NeptuneNeptune 水星水星MercuryMercury 金星金星VenusVenus 地球地球EarthEarth 火星火星MarsMars 木星木星Jupiter Jupiter 土星土星SaturnSaturn 天王星天王星UranusUranus Mercury(水星）水星）Venus（金星）（金星）Mars（火星）（火星）Jupit

8、er(木星木星)Uranus(天王星）天王星）Neptune(海王星）海王星）Earth（地球）（地球）Saturn(土星土星)My Very Excellent Mother Just Sent Us Nine PizzasHow to remember the order of the eight planets around the sun?EarthJupiterMarsMercuryNeptuneSaturnUranusVenus八大行星八大行星 八大行星即金星、土星、木星、水星、地球、火星、天王星、海王星八颗行星，冥王星不再为经典行星。 国际天文学联合会大会投票5号决议，部分通过新

9、的行星定义，冥王星被排除在行星行列之外，而将其列入“矮行星”。 新的天文发现不断使“九大行星”的传统观念受到质疑。天文学家先后发现冥王星与太阳系其他行星的一些不同之处。冥王星所处的轨道在海王星之外，属于太阳系外围的柯伊伯带，这个区域一直是太阳系小行星和彗星诞生的地方。20世纪90年代以来，天文学家发现柯伊伯带有更多围绕太阳运行的大天体。比如，美国天文学家布朗发现的“2003UB313”，就是一个直径和质量都超过冥王星的天体。八大行星（续）八大行星（续） 国际天文学联合会大会放弃将冥王星之外的太阳系八大行星称为“经典行星”的说法，从而确认太阳系只有8颗行星，冥王星被降级为入“矮行星”。此前盛传的

10、第一种方案中提出了太阳系另外增加3颗二级行星的计划流产。 宇宙大爆炸 大约在50亿年前，宇宙所有的物质都高度密集在一点，有着极高的温度，因而发生了巨大的爆炸。大爆炸以后，物质开始向外大膨胀，就形成了今天我们看到的宇宙。大爆炸的整个过程是复杂的，现在只能从理论研究的基础上描绘过去远古的宇宙发展史。在这150亿年中先后诞生了星系团、星系、我们的银河系、恒星、太阳系、行星、卫星等。现在我们看见的和看不见的一切天体和宇宙物质，形成了当今的宇宙形态，人类就是在这一宇宙演变中诞生的。Do you know how our life began on the earth? Do you know any a

11、ncient idea about the beginning of the universe? Pangu separates the sky from the earth. 中国神话传说中有盘古开天地的说法。中国神话传说中有盘古开天地的说法。巨人盘古用一把利斧劈开混沌巨人盘古用一把利斧劈开混沌, 将天地将天地分开。死后分开。死后, 他的气息化成风和云他的气息化成风和云, 声音声音变成轰轰的雷声变成轰轰的雷声, 左眼化为太阳左眼化为太阳, 右眼化右眼化为月亮为月亮, 手足与四肢变成大地的四极与手足与四肢变成大地的四极与五方的名山五方的名山, 血液化成江河血液化成江河,筋脉铺成道筋脉铺成道路路

12、, 肌肉形成田地肌肉形成田地, 须发成为星星须发成为星星, 牙齿牙齿和骨骼化为金属、珍珠、玉石和骨骼化为金属、珍珠、玉石, 汗水成汗水成为滋润万物生长的甘霖和雨露。为滋润万物生长的甘霖和雨露。Nvwa made humans.Religious Beliefs According to Bible , God created the world in seven days. Day 1: God created Day and Night.Day 2: God created sky.Day 3: God created dry landthe earth, and seas.Day 4:Go

13、d created two great lights(the sun, the moon) and stars.Day 5: God created living things in the air and sea.Day 6: God created the land animals and the first man.Day 7: God rested and called this day Holy.India Brahma is the god first represented in the Hindu Triad. He is the creator of the universe

14、 and all living beings are said to have evolved from him.How life began on the earthplaneto2co2oxygencarbon dioxideamphibian reptile mammalatmosphere 1. When water gets hotter and hotter, it will turn into_.2. Students shouldnt smoke, because it is _ to health.3. If you stop somebody doing something

15、, you _ him _ doing it.4. If you can not live by yourself, you have to _ _ your parents.5. The news of the Yushu earthquake _ quickly all over China, so we are very sad.6. The storm was so _ that lots of trees were blown down.vapour harmful from preventdepend on spread violent ListeningI. Listen to

16、the passage carefully and match the main idea with each paragraph. Para. 1 The formation (形成形成) of the earth.Para. 2 The importance of water for life.Para. 3 A widely accepted theory about the formation of the universe.Para. 4 The arrival of humans and their impact on the earth. Para. 5 The developm

17、ent of plants and animals on the earth.Read the first 3 paragraphs quickly and find out what it is mainly about. The development of the earth.Read the first 3 paragraphs carefully and find out how the earth developed step by step. (1) What happened in the beginning?The Big Bang(2) What happened seve

18、ral billion years after the Big Bang? a cloud of dust a violent solid ball exploded with fire and rock produced water vapour and gases(3) What happened next?(4) What did the water vapour and gases form?The earths atmosphereWater appeared.(5) What appeared on the earth after it cooled down?(6) What d

19、id the water form?oceans and seasThe development of lifeRead the last 2 paragraphs quickly and find out what it is mainly about. Read the last 2 paragraphs carefully and find out how life developed step by step. Big Bang A solid ball The earth Atmosphere It was full of water.Original cellsThe cells

20、in the water began to separate.waterplants in the watershellfish and fishplants on landinsects and amphibiansmammals reptiles dinosaurs Man had evolved from apes. Put the order of development of life into a timeline. Insects and amphibians appeared. The earth became a solid ball. Reptiles appeared.

21、The earth was a cloud of dust. Shellfish and other fish appeared. Clever animals with hands and feet appeared. Dinosaurs appeared. Small plants grew on the water. Plants began to grow on dry land. Water appeared on the earth. The universe began with a “Big Bang”. Mammals appeared.123456891071112Read

22、 the passage again and answer the following questions.1. Why was the earth different from other planets? The water remained.2. Why did the plants grow before the animals came? Because plants provide oxygen for animals to breathe. 3. Why is it wrong in films and stories to show dinosaurs and people t

23、ogether? Because dinosaurs died out long before human beings developed on the earth.4. Why do you think that humans are the cleverest animals on the earth? They are the cleverest animals because they have larger brains than any other creatures on the earth so far.5. There used to be nine planets in the solar system. Recently scientists have decided that one of them can no longer be considered a planet. Do you know the name of that planet?