Astronomy:the science of the stars 编号001

【学习目标】students understand the text's forms and contents and learn about festival Astronomy

【教学重点】 the words and the expressions in the text

【教学难点】 How to enable the students to grasp the usages of words and in order to and understand some difficult and long sentences .

【知识链接】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。

【自主预习】

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 amaz

【自学检测】

a cloud of energetic dust____________ combine into__________become violent__________________ the solid surface____________explode loudly________________ produce the water vapor____________

make the earth's atmosphere__________________cool down______________ be different from_____________ disappear from_______________show one's quality___________________

dissolve harmful gases______________________, develop life______________encourage the development of..._________________ produce young______________lay eggs______________

spread all over the earth__________________, move around____________, go by___________ prevent...from...______________escape from... into...________________, become hot_______

depend on..._____________________

【预习疑问】

【课堂探究】

Task 1 Scanning the text to answer the questions below .

1. What is the original earth's atmosphere made up of?

2. What is the fundamental to the development of life?

3. Which kind of life-being first appeared on the earth, plants or animals?

4.Choose the main idea for each paragraph

( )The arrival of humans and their impact on the earth.

( )The formation of the earth.

( )The development of plants and animals on the earth.

( )A widely accepted theory about the formation of the universe.

( )The importance of water for life.

Task 2 Detailed reading

• （ ）A Insects and amphibians appeared.

• （ ）B Dinosaurs appeared.

• （ ）C The earth became a solid ball.

• （ ）D Small plants grew on the water.

（ ）E Reptiles appeared.