必修三unit4warmingupandReading

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1、HOW LIFE BEGAN ON THE EARTHWarming upWhat are the names of the eight planets that circle our sun?海王星海王星 Neptune水星水星Mercury 金星金星Venus 地球地球Earth 火星火星Mars 木星木星Jupiter 土星土星Saturn天王星天王星Uranus A Quiz Game 1. How old is the earth? A. About 3.5 billion years B. About 4.5 billion years C. About 5.5 billion y

2、ears D. About 6.5 billion years 2. _ of the earth surface is covered by water. 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. 9 4. What is the total population of humans on the earth? A. About 3.5 billion B. About 4.5 billion C. About 5.5 billion D. A

3、bout 6.5 billion5. How long does the rotation (自转自转) of the earth take? A. 12 hours B. 24 hours C. a month D. 365 days6. Which continent is the smallest? A. Africa B. North America C. South America D. Oceania 7. On what day is the Earth day celebrated? A. April 22 B. May 4 C. August 21 D. November 1

4、18. Which ocean is the largest? A. The Pacific Ocean B. The Arctic Ocean C. The Indian Ocean D. The Atlantic Ocean9. Which country has the largest area? A. Canada B. China C. Russia D. U.S.APrediction Look at the picture. Do you know the topic of this unit?海洋里的细胞开始分裂海洋里的细胞开始分裂 登陆登陆爬行动物爬行动物恐龙恐龙Mammal

5、s人人类类的的兴兴起起Do you know what it was like before life appeared on earth?可以演化成低级生命的小液滴水可以演化成低级生命的小液滴水泡状的太空原始生命体泡状的太空原始生命体It was full of water.1. The origin of life on earth is a question that interests astronomers. What do you know about it? How old is the universe? (several billion years ago) How old

6、is the Earth? (between 4.5 and 3.8 million years ago) Which were the first creatures or plants on Earth?.Pre-reading2. Each religion and culture has its own ideas about how life began on earth. What do you know? In China, we all know that Pangu separates the sky from the earth and Nvwa made humans.P

7、angu 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, 将天地分将天地分开。死后开。死后, 他的气息化成风和云他的气息化成风和云, 声音变声音变成轰轰的雷声成轰轰的雷声, 左眼化为太阳左眼化为太阳, 右眼化为右眼化为月亮月亮, 手足与四肢变成大地的四极与五方手足与四肢变成大地的四极与五方的名山的名山, 血液化成江河血液化成江河, 筋脉铺成道路筋脉铺成道路, 肌肌肉形成田地肉形成田地, 须发成为星星须发成为星星, 牙齿和骨骼牙齿和骨骼化为金属、珍珠、玉

8、石化为金属、珍珠、玉石, 汗水成为滋润万汗水成为滋润万物生长的甘霖和雨露。物生长的甘霖和雨露。Nvwa made humans.Other legends about the beginning of universe.The Biblical AccountDay 1: God spoke and separated light from darkness creating Day and Night. Day 2: God spoke and separated the water creating sky and ocean. Day 3: God spoke and created d

9、ry land. Day 4: God spoke and created the sun, moon and stars. Day 5: God spoke and created living creatures in the air and sea. Day 6: God spoke and created the land animals and man. Day 7: God rested and blessed this day calling it Holy. Big BangGasNew starsDying starsremnants平面图平面图 太阳系太阳系地球大气地球大气

10、1. When did the “Big Bang” happen? It happened several billion years ago.Scanning Read the passage quickly and answer the questions.2. What form was the earth after the “Big Bang”? The earth was still just a cloud of dust.3. What made up the earths atmosphere after the earth exploded? Carbon, nitrog

11、en, water vapour and other gases. 4. How did water come into being on the earth? As the earth cooled down after it exploded, water came into being.5. Whats the significance of the presence of water on the earth? It allowed the earth to dissolve harmful gases and acids into the oceans and seas.6. Wha

12、t was important to the development of fish? oxygen. 7. What made possible the rise of mammals on the earth? The disappearance of dinosaurs made the possible the rise of mammals on the earth.8. Why are mammals different from all life forms in the past? They gave birth to young baby animals and produc

13、ed milk to feed them.Careful readingI. Read 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 the

14、ir impact on the earth. Para. 5 The development of plants and animals on the earth.II. Fill in the blanks in the following form.TimeWhat happenedBig Bang _ began to form and combine to create stars and other bodies.AtomsBetween 4.5 and 3.8 billion years ago Dust settled into a solid and _ globe. The

15、 earth exploded to produce its _. The continued _ of water allowed the earth to dissolve harmful gases and _ into the oceans and seas.violentatmospherepresenceacidsMany millions of years later The first small plants on the surface of the water produced _. Early _ and all sorts of fish appeared. Gree

16、n plants began to grow on land. Insects and _ appeared.oxygenshellfishamphibiansMany millions of years later _ appeared and they laid eggs. Dinosaurs developed, laid eggs and _ for more than 140 million years. Mammals rose and _ babies.Reptilesexistedgave birth toAbout 2.6 million years ago Some sma

17、ll _ animals with hands and feet appeared and spread all over the earth.NowHumans produce too much carbon _, making the earth too hot.cleverdioxideHow life began on the earth.“Big Bang”other bodies_ starsEarth: a cloud of _atomsdustSummary a solid _the earths _other _Water: _ to the development of l

18、ifewater vapour nitrogen carbonextremely small _ on the surface of the waterglobegasesatmospherefundamentalplantsearly _ and all sorts of fishgreen plants on landland animalsinsectsamphibians_huge animals (dinosaurs)the rise of _human beingsshellfishreptilesmammalsSpeaking What should we do for our

19、earth?You can use the following words or phrases to help you:prevent from harmful global warming carbon dioxide in turn depend on as a result thus atmosphereWhat should we do for our earth?Lets take part in the activities to save the earth!How life began on earth is one of the biggest puzzles that scientists found hard to solve. What other puzzles are hidden in the passage? Find them out and do some research.