必修三unit4warmingupandReading

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 (自轉(zhuǎn)自轉(zhuǎn)) 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?海洋里的細(xì)胞開始分裂海洋里的細(xì)胞開始分裂 登陸登陸爬行動(dòng)物爬行動(dòng)物恐龍恐龍Mammal

5、s人人類類的的興興起起Do you know what it was like before life appeared on earth?可以演化成低級(jí)生命的小液滴水可以演化成低級(jí)生命的小液滴水泡狀的太空原始生命體泡狀的太空原始生命體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. 中國神話傳說中有盤古開天地的說法。中國神話傳說中有盤古開天地的說法。巨人盤古用一把利斧劈開混沌巨人盤古用一把利斧劈開混沌, 將天地分將天地分開。死后開。死后, 他的氣息化成風(fēng)和云他的氣息化成風(fēng)和云, 聲音變聲音變成轟轟的雷聲成轟轟的雷聲, 左眼化為太陽左眼化為太陽, 右眼化為右眼化為月亮月亮, 手足與四肢變成大地的四極與五方手足與四肢變成大地的四極與五方的名山的名山, 血液化成江河血液化成江河, 筋脈鋪成道路筋脈鋪成道路, 肌肌肉形成田地肉形成田地, 須發(fā)成為星星須發(fā)成為星星, 牙齒和骨骼牙齒和骨骼化為金屬、珍珠、玉

8、石化為金屬、珍珠、玉石, 汗水成為滋潤萬汗水成為滋潤萬物生長的甘霖和雨露。物生長的甘霖和雨露。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平面圖平面圖 太陽系太陽系地球大氣地球大氣

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 earth?You can use the following words or phrases to help you:prevent from harmful global warming carbon dioxide in turn de