人教高中英語(yǔ)必修3Unit4-reading(共33張)課件

1、人教課標(biāo)版 高一必修3 Unit 4人教課標(biāo)版 高一必修3 Unit 4ReadingHOW LIFE BEGAN ON THE EARTHReadingWarming upWhat are the names of the eight planets that circle our sun?Warming upWhat are the names oA 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 years D. Ab

2、out 6.5 billion years 2. _ of the earth surface is covered by water. A. 20% B. 30% C. 50% D. 70%A Quiz Game 1. How old is the3. 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. Abo

3、ut 5.5 billion D. About 6.5 billion3. How many planets are there 5. How long does the rotation (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?

4、A. April 22 B. May 4 C. August 21 D. November 115. How long does the rotation 8. 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.A8. Which ocean is the largest?Pre

5、diction Look at the picture. Do you know the topic of this unit?Prediction Look at the picture1. 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 is the Earth? (between 4.5 and 3.8 million ye

6、ars ago) Which were the first creatures or plants on Earth?.Pre-reading1. The origin of life on earth2. 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.2. Each religion

7、 and culture hPangu separates the sky from the earth. Pangu separates the sky from tThe 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 dry land. The Biblical Acco

8、untDay 1: GodDay 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. Day 4: God spoke and created t1. When did the “Big Bang”

9、 happen? It happened several billion years ago.Scanning Read the passage quickly and answer the questions.1. When did the “Big Bang” hap2. 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, ni

10、trogen, water vapour and other gases. 2. What form was the earth aft4. How did water come into being on the earth? As the earth cooled down after it exploded, water came into being.4. How did water come into bei5. Whats the significance of the presence of water on the earth? It allowed the earth to

11、dissolve harmful gases and acids into the oceans and seas.5. Whats the significance of 6. What 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.6. What was impor

12、tant to the d8. Why are mammals different from all life forms in the past? They gave birth to young baby animals and produced milk to feed them.8. Why are mammals different fCareful readingI. Read the passage carefully and match the main idea with each paragraph. Careful readingI. Read the pasPara.

13、1 The formation (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 development of plants and animals on the earth.Para. 1 The formationII. Answer the

14、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. II. Answer the following quest3. Why is it wrong in films and stories to show dinosaurs and people toget

15、her? Because dinosaurs died out long before human beings developed on the earth.3. Why is it wrong in films an4. 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 creature on the earth so far.4. Why do y

16、ou think that human5. 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? Do you know why they removed it? Pluto. Scientists now think it is too small to be called a planet. 5.

17、 There used to be nine plane6. What problem is caused by human beings? They cause global warming. 6. What problem is caused by hIV. True (T) or False (F).1. The earth appeared before the Big Bang happened.2. The original atmosphere consisted of nitrogen and oxygen. 3. The main difference between the

18、 earth and other planets is that there is water on the earth. 4. Life began in water and then on land.FFTTIV. True (T) or False (F).FFTT Post-reading Post-readingWe have only one earth!We have only one earth!Speaking What should we do for our earth?Speaking What should we do forYou 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 atmosphereYou can use the following wor