Unit 4 Astronomy: the science of the stars 平湖中学 沈芳

a Chinese. an astronaut Shenzhou Ⅴ Oct. 16, 2003 male

Yang Liwei

Yang Liwei --- Space Hero; the First Chinese to space 完成了中国人几千年来的飞天梦。

A picture taken by Yang Liwei

The Solar System 1111

On which planet are there lives at present ? Earth

Ancient Chinese had their own ideas about how life began on the earth. Do you know these stories? Give an example, please. How life began on the earth?

Nuwa makes human being from the clay( 粘土 ). Pangu separates the sky from the earth

1.According to a widely accepted theory, the universe began with a ___________that threw matter in all directions. 2.It was not immediately obvious that ___________was to be fundamental to the development of _______. 3.They are putting too much CO 2 into the atmosphere, which prevent _______ from escaping from the earth. Task one: Fill in the blanks after listening

1.According to a widely accepted theory, the universe began with a ____________that threw matter in all directions. 2.It was not immediately obvious that ___________was to be fundamental to the development of ________. 3.They are putting too much CO 2 into the atmosphere, which prevent _______ from escaping from the earth. Task one: Fill in the blanks after listening water life “Big Bang” heat

What’s the writing style of the text? A. Narrative 记叙文 B. Explanation 说明文 C. Essay 散文

Let’s get to know how life began on the earth Task two: Read paragraph 1--3 quickly by yourselves. After the “Big Bang”, what happened on the earth ?

for several billion years after “Big Bang” between4.5 and 3.8 billion years ago What happened on the earth at that time? what did the explosion produce? A cloud of dust settle into a solid globe Explode…with fire & rock (produce C, N 2, H 2 O, and other gases) made atmosphere water appeared Cool down Life began on the earth What did the water do on the earth? dissolve harmful gases into …

Read paragraph 4 and 5 quickly, and find out the order of development of life on the earth

what kind of life form appeared first? small plants on the water shellfish & other fish Green plants began to grow on land insects and amphibians can live on land and in the water the plants grew into forests reptiles lay eggs the age of dinosaurs mammals give birth to young baby animals clever animals

What problem are these clever animals causing? They are putting too much CO 2 into the atmosphere

The text can be divided into Part one: The development of earth itself. Part two: The development of life. Life in the water Life on the land Order of writing: Summary two parts Chronological (time)

1. Why did the plants grow before the animals came? 2. Why is it wrong to show films with dinosaurs and people together? Pair-work Do you have more questions after reading the text? Discuss them with your partner.

1. Why did the plants grow before the animals came? 2. Why is it wrong to show films with dinosaurs and people together? Pair-work Because plants provide oxygen and food for animals. Because dinosaurs died out long before human being developed on the earth.

What will happen when we put too much CO2 into the atmosphere? greenhouse effect global warming animals will die out plants will die out There will be no life on the earth Discussion rise of the sea level icebergs and glaciers melt

A United Nations Climate Change Conference will be held next month. Our class is going to write a letter to the conference. What would you like to say in the letter? Do you have any good ideas about how to prevent Global Warming? Please form a group and discuss.

One Earth, One Home Heal the world Make it a better place For you and for me and the entire human race

Phrases and Useful Expressions 1.circle around 绕 … 转 2.according to… 根据 3. a widely accepted theory 熟知的理论 4.in all directions 向着四面八方 5. in time 及时；终于 6.cool down 冷却 7.be fundamental to… 对 … 关键 8.a chain action 连锁反应 9. …make it possible for…to do… 使 … 可能 10. give birth to… 生育 11. prevent… from 阻止 … 做 … 12. millions of years to come 未来的几百万年

L6: What it was to become was uncertain until between…ago when the dust settled into a solid globe. L10: They were in time to produce… L18: It was not immediately obvious that water was to be fundamental to the development of life. L47: They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. Difficult Sentences

Homework Read the text after class. Find more solutions to global warming. Finish the exercises in the paper.