Using LanguageⅡppt配套的教案及板书设计

Aims To develop the students’ reading ability

To learn something about astronomy Procedures I. Warming up by learning vocabulary

Good morning, class! Today, w are going to take Unit 4 Astronomy: the science of the stars. Before we read the text, let’s turn to page 99 and get familiarized with the vocabulary first. Pay attention to the making of the word. Study the prefixes, roots and suffixes in the words.

Astronaut Yang Liwei II. Pre-reading 1. Looking and saying

Have you ever wondered how the universe began? Well I'm sure you may have many answers to this question, but I have one that perhaps, you may not have heard of yet. I will be giving you my theory on this subject. Now look at the screen and listen to me telling you something exciting. 科学家透露：宇宙可能有两个

我们的宇宙和一个"隐藏的"宇宙共同"镶嵌"在"五维空间"中。在我们的宇宙早期，这两个宇宙发生了一次相撞事故，相撞产生的能量生成了我们宇宙中的物质和能量。

2. Talking and sharing Do you know how the universe began? In the 1920s in California, astronomer Edwin Hubble observed distant galaxies using an extremely powerful telescope. He made two mind-boggling(unbelievable) discoveries.

First, Hubble figured out that the Milky Way isn’t the only galaxy. He realized that faint, cloud-like objects in the night sky are actually other galaxies far, far away. The Milky Way is just one of billions of galaxies.

Second, Hubble discovered that the galaxies are constantly moving away from each other. In other words, the universe is expanding. The biggest thing that we know about is getting bigger all the time.

A few years later, Belgian astronomer Georges Lemaître used Hubble‘s amazing discoveries to suggest an answer to a big astronomy question: “How did the universe begin?”

III. Reading 1. Listening and reading aloud

Now please listen to the recording and then read the text aloud. Pay attention to how the native speaker is reading along and where the pauses are within each sentence. I will play the tape twice and you shall read aloud twice, too.

2.

Reading and underlining Next you are to read and underline all the useful expressions or collocations in the passage. Copy them into your notebook after class as homework.

Collocations from HOW LIFE BEGAN ON THE EARTH a cloud of energetic dust具有能量的尘埃, combine into…合成……, move around the sun环绕太阳运转, become violent变得激烈, the solid surface固体表面, explode loudly猛烈爆炸, in time及时，最终, produce the water vapor产生水蒸汽, make the earth’s atmosphere构成了地球的大气层, cool down冷却, on the surface在表面, be different from…与……不同, go round the sun环绕太阳运转, disappear from…从……消失, stay on…存留在……, show one’s quality显现某人的特性, dissolve harmful gases分解，溶解有害气体, become part of…变成……的一部分, develop life发展生命, grow in the water在水里生长, fill… with…用……来填充……，充满了……, encourage the development of…鼓励……的发展, millions of years later几万年以后, live on land在陆地上生活, live in the sea在海里生存, grow into forests长成森林, produce young生出幼仔, lay eggs下蛋, animals with hands and feet长着手脚的动物, spread all over the earth遍布全世界, develop new methods发展了新的方法, grow food种植, move around迁徙, go by过去，推移, take care of…在意……，照看好……, put…into…把……带入，放入……, prevent…from…防止……做……, escape from… into…从……逃离到……, become hot变热, depend on….依靠，依赖，取决与……, solve a problem解决一个问题

3. Reading and understanding difficult sentences

Skim the text and identify the difficult sentences of each paragraph. You may put your hand up if you have any questions.

4. Reading and transferring information

Read the text again to complete the table below,

HOW LIFE BEGAN ON THE EARTH What was the earth like after

the “Big Bang”?

Why was the earth different?

How was life developed on

earth? What did small clever animals

do?

5.

Reading and translating

As you have read the text times, you can surely put it into Chinese. Wang Hongqin, will you be the first to have a try, of putting the first paragraph into Chinese. IV. Closing down Closing down by doing exercises To end the lesson you are to do the comprehending exercises 2 and 3 on pages 26 and 27.

Closing down by having a discussion—How Did the Universe Begin? There are only three possible answers to this question.

1．It was created by something larger than itself since the first law of thermodynamics(热力学) says that energy cannot be created, only changed. The universe had to be created by something outside itself, because of the same law. We also know that man could not have created it.

2．It was begun by chance (or accident); or 3．The answer is not sure. Shown this way, the question is:

Additional Materials Complete the summary of the story with one word in each blank. HOW LIFE BEGAN ON THE EARTH After the “Big Bang” came a

1

of energetic dust, the earth. Dust combined into a ball, moving

2

the sun. The earth became violent. Then it

3

loudly. In time, the water vapor was produced, making the earth’s atmosphere

4

down. Water then appeared on the

5

. The earth was to be different from other planets going round the

6

. Water disappeared from other planets. But it stayed on

7 .

Small plants began developing

8

the water. Years later green plants came into

9 . The air then was

10

with oxygen. Millions of years later, small

11

animals were found to be living on the

12

, in the sea. They spread all over the earth, moving

13

the earth, putting too much carbon dioxide into the atmosphere which

14

heat from escaping from earth into space.

In the end the earth may become too hot to live

15

. （Keys: 1. cloud 2. around 3. exploded 4. cool 5. surface 6. sun 7. earth 8. in 9. being 10. filled 11. clever 12. land 13. around 14. prevents 15. upon）

Comprehension questions 1.

What forms the earth’s atmosphere?

A. Carbon dioxide, oxygen. B. Carbon dioxide, oxygen, poisonous gas. C.

Water vapour, carbon dioxide, oxygen, nitrogen.

D.

Water vapour, carbon dioxide, oxygen, nitrogen and other gases. 2.

Can you tell what is the “special qualities” of the earth according to the passage?

A. The earth goes around the sun. B. The earth was solid shape which was last. C. There are animals and human beings live on it. D. Water remains on the surface of the earth. 3.

What kind of factor improve the progress of life? A. Water forms on the earth’s surface. B. Green plants began to appear on land.

C.

The air is full of carbon dioxide. D. Animals began to appear such as insects, amphibians, est. 4.

What is the main idea of this passage? A. It tells us how does life begin to appear on the earth.

B. It tells us why does green plants grow before animals.

C.

It tells us water plays an important role in the development of life.

D.

D. It tells us carbon dioxide is the reason why living beings will die in the future, 5.

The author infers us that if we want to the life continue on the earth, what should we do? A. We should produce more carbon dioxide to cause global warming. B. We should solve the problem of global warming as soon as possible. C. We should bear less people and think about a new way to grow more crops. D. We should be worthy of water. (Key: DDBAB)