2. How Life Began on the Earth Period 1 Unit 4 Astronomy: the science of the stars the science of the stars

3. Astronomy Astronomy Astronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it. astronomer astronaut?

4. 1.Before listening, could you share with us what you know about space travel? Which countries have sent people into space? Three countries have sent astronauts into space: Russia, the USA and China. Only the USA has sent astronauts to the moon. 2. Main idea Yang Liwei talks about the excitement of space travel and the qualifications and experience needed to become an astronaut.

5. QuestionsYang Liwei’s answers When was the most exciting moment? What did he do? What surprised him? Listen to Part 1

6. QuestionsYang Liwei’s answers When was the most exciting moment? What did he do? What surprised him? When his spaceship lifted off the ground he knew he was really on his way into space The beauty of space He watched all his instruments and stayed calm. Listen to Part 1

7. Information on Yang Liwei, the astronaut Education Training Physical qualities Personal qualities Listen to Part 2

8. Information on Yang Liwei, the astronaut Education Training Physical qualities Personal qualities He got his degree. He trained for ten years to fly airplanes and then to fly a spaceship. Smaller than 170 cm; less than 70 kg. Listen to Part 2 Calm, hard-working Answer key for Ex. 5: Dreamed, young, wish, true, gradually, opportunity, love

9. Check your knowledge 1. Copernicus concluded that _______________ _____________________ _________. 2. There are _____ planets in the solar system, including the earth. 3. The solar system is just a small part of the ________. the solar system eight Milky Way, galaxy / universe the moon goes around the earth and the earth goes around the sun.

10. How did the earth come into being? Chinese tale: Pangu created the world Bible: God created the universe Science: The Big Bang Scientists believe that around 15 billion years ago, a huge explosion happened, creating our universe.

11. How Life Began on the Earth a good title? the development of life / how life began (Para 4,5) the formation of the earth / how the earth came into being (Para 1,2,3)

12. Page 27 Ex.1 para 1: a widely accepted theory about the formation of the universe 2. the formation of the earth 3. the importance of water for life 4. the development of plants and animals on the earth 5. the arrival of humans and their effect on the earth Ex. 2 10, 7, 3, 8, 4, 9,6,1,5,2,12, 11

13. The universe began with a big bang. Water is fundamental to the development of life The appearance of plants make possible the rise of animals on the earth. Dinosaurs die out because of climate change. according to a widely accepted theory,… it remains a puzzle. the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction, which made it possible for life to develop. they multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish.

14. 1.2. 3. 4. 5. The formation of the earth

15. combine into Explode with fire and rock dissolve harmful gases Big Bang a cloud of dust a solid ball AtmosphereWater oceans and seas cool down Finish the following form. Para 1-3

16. Fill in the blanks with the proper words. After the _________, the earth was a cloud of __________. Later the dust began to _______ into_______. And then it ________ loudly with fire and rock, which were in time to _________ the water vapour, carbon dioxide, …which were to make the earth’s ____________. As the earth _______ down, _____ began to ________ on its surface. Water had ____________ from other planets or satellites, but it _______on the earth. That made it possible for life to begin to ______. dust settle exploded produce cooled appear disappeared stayed develop “Big Bang” a solid ball atmosphere water

17. 1.According to a widely accepted theory, the universe began with a “Big Bang” that threw matter in all directions. The proceedings will begin with a speech to welcome the guests. 大会议程首先 是向来宾致欢迎辞。 TO begin with, she is too young for that kind of job. cf. start with… 以 …… 结束 …… end …(up) with…

18. 2, a cloud of dust 3.What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. a cloud of birds 3.What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.

19. 4.They were in time to produce carbon, nitrogen, water vapour and other gases, which were to make the earth’s atmosphere. The doctor came in time to save her life. Try hard, and you will succeed in time. You will learn how to do it in time. This discovery was to have a major effect on the treatment of heart disease. To be to do 常表示不可避免将要发生的事

20. 立刻, 马上 有时 每次 ; 依次 从前 按时 ; 准时 从前 暂时 不时地 与 time 相关的短语 : in no time at times at a time once upon a time on time at one time for the time being from time to time

21. 1.The spaceship burned up as it entered the earth’s atmosphere. 2.Reducing levels of CO2 in the atmosphere is of great importance. 3.These plants love warm atmospheres. 4.We use music and lighting to create a romantic atmosphere. 5.The children grew up in an atmosphere of violence and insecurity. 6.She told a joke to lighten the atmosphere. 7. There is a smoky atmosphere in the room. A. 大气（层） B. 气氛、环境 C. （室内的）空气

22. 5. What is even more important is that as the earth cooled down, water began to appear on its surface. He is too excited; we must do something to make him cool down. 冷静下来 cool him down 6. … but unlike the earth, it had disappeared later. 7, be fundamental to … Hard work is fundamental to success. 适度的运动封健康是绝对必要的。 Moderate exercise is fundamental to good health.

23. 8. This produced a chain reaction, which made it possible for life to develop. The appearance of plants make possible the rise of animals on the earth. a chain store I find it useless arguing with him. He made it a rule to get up early. He explained to us that he couldn’t help us. He announced to us that he would go abroad next month.

24. The development of life (para4-5)

25. The __________of life 1________________ 2____________________ 3________________ 4__________ 5__________ 6_________ 7__________ 8__________ 9__________ small plants in water shellfish and all sorts of fish green plants on land insects amphibians (on land and in water) forests reptiles (on land) dinosaurs (on land) mammals (on land) plantsanimals development / evolution

26. Fill in the blanks. The arrival of ___________ encouraged the ____________of early ________________________. Many millions of years later __________________ began to appear _________. Later ____________ appeared. Some were________. Others, called __________,were able to live on lands well as __________. When the plants grew into forests, _________appeared for the first time. After they disappeared, _________became more important. They were the last group of animals different because they _________milk from within their bodies. development shellfish and all sorts of fish on land land animals amphibians dinosaurs mammals produced small plants the first green plants insects in the sea

27. 9, on the surface of the water 10. They multiplied and filled the oceans and seas with oxygen… We must multiply our efforts to clear up the mystery. 我们必须加倍努力来澄清这一神秘的事。 Four multiplied by seven is twenty-eight. 7 乘 4 等于 28 。

28. 11. Others, called amphibians, were able to live on land as well as in the water. 12. After that, some huge animals, called dinosaurs, developed. 13, reptiles appeared for the first time 14, lay eggs 15, the age of the dinosaurs ended 16, all life forms in the past 17, give birth to young baby animals

29. 18. Thus they have, in their turn, become the most important animals on the planet. They, in their turn, made a proposal. 他们接着也提出了一个建议。 The girls called out their names in turn. 那些女孩儿逐一报出自己的名字。

30. 19.As a result of this, many scientists believe the earth may become too hot to live on. He often tells lies. He is too unfaithful to believe in. 20. So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. 在未来的几年里 in the years to come = in the coming years

31. What is the suggested problem caused by human beings in the passage? A. Air pollution B. Large population C. Global warming D. Lack of energy …putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.

32. Assignment 1. Think about how to solve global warming and make the earth a better place to live on? 2. Finish Ex.1-3 on page 28