内容正文:
Unit 1 Our living planet Period 5 Extended reading(1)
学习目标
1. Understand the text “Inside the Earth” by skimming & scanning;
2. Retell the text in your own words and write a summary of it.
活动方案
Ⅰ. Choose the best answers to the following questions according to the text and comic strip.
( ) 1. Which is in the deepest of the Earth?
A. Crust. B. Core. C. Mantle. D. Ice cages.
( ) 2. Which statement is TRUE according to the text?
A. Not all the people can crack the Earth open like an egg.
B. Scientists know about the Earth's internal structure based on observing waves.
C. Almost all living things on the Earth rely on energy from the sun.
D. Nobody will be able to drill into the mantle in the future.
( ) 3. How can scientists reveal the origin of life?
A. By analysing earthquake waves.
B. By storing hydrogen in ice cages.
C. By drilling very deep holes into the Earth.
D. By studying microorganisms deep inside the Earth.
( ) 4. How many metres deep is the boundary between the Earth's crust and the mantle below?
A. 30,000 m. B. 150,000 m. C. 750,000 m. D. 6 million m.
( ) 5. Why is “elephants” mentioned in “Journey to the centre of the Earth”?
A. The deeper we arrive into the Earth, the more elephants we may see.
B. There are many elephants living on the Earth.
C. The number of the elephants indicates the pressure inside the Earth.
D. The more the elephants are, the higher the temperature is.
Ⅱ. Answer the following questions according to the text.
1. Why have scientists drilled very deep holes into the Earth?
2. What is the possible way to store hydrogen?
Activity 2: Read between the lines.
1. Why does the writer ask you to think about the importance of what lies beneath your feet?
2. Can you imagine what you might find inside our planet?
Activity 3: Read beyond the lines.
1. Do you support the act of digging into the centre of the Earth? Why?
2. What would happen if you dig into the centre of the Earth?
Activity 4: Consolidate and feed back.
Fill in the blanks according to the text.
Much of what scientists know about the Earth's internal structure 1._________(base) on analysing earthquake waves. To find out more about the 2._________(Earth) makeup, scientists hope 3._________(drill) deep holes and reach the mantle within a few years so as to 4._________(well) understand the geology of the Earth.
Studying the inside of the Earth has many 5._________(benefit). For example, it may help solve the 6._________(store) problem of hydrogen and pave the way for cars to run on hydrogen fuel. Besides, scientists hope that research into microorganisms deep inside the Earth would cast light 7._________ the origin of life. 8._________ life on the Earth can survive deep underground without sunlight, life could also be 9._________(thrive) beneath the surface of Mars.
Such a study as above would lead to exciting and 10._________(enlighten) discoveries, and benefit the mankind.
Activity 5: Warmup for the next period.
Preview the new words and find the English expressions of the following Chinese in the text.
1. 而是,而宁可说是 2. 钻很深的洞
3. 更好地了解地球的地质情况 4. 研究令人兴奋的可能性
5. 直到现在 6. 揭示生命的起源
7. 在某些极端条件下
8. (使)变狭窄;(使)靠拢,靠紧;(尤指临时)关门停业
9. 令人兴奋且有启发性的发现 10. 进行一次奇妙的地心之旅
Activity 1:
Ⅰ. 1—5 BCDAC
Ⅱ. 1. In order to find out more about the Earth's makeup.
2. Trapping hydrogen in the ice cages can help to store it.
Activity 2:
1. Because the study of the inside of our planet would lead to exciting and enlightening discoveries, and benefit the mankind.
2. We might find how living things can survive without sunlight and it might help us to explore other planets like Mars.
Activity 3:
1. It depends. I think the exploration into the Earth helps the development of science and benefits the mankind in many ways. But at the same time we must remember not to destroy the globe. To protect the Earth, it's vital to reject the overexploitation of the Earth at any time.
2. Our “down” trip would have gravity increasing our speed every second as we are pulled towards the core, propelling our way through the Earth until we reach the centre. Once there, gravity would begin acting as a buffer against us, making our “up” trip increasingly slower.
Activity 4:
1. is based 2. Earth's 3. to drill 4. better 5. benefits 6. storage 7. on 8. If
9. thriving 10. enlightening
Activity 5:
1. but rather 2. drill very deep holes 3. better understand the geology of the Earth 4. look at exciting possibilities 5. as yet 6. cast light on the origin of life 7. under certain extreme conditions 8. close up 9. exciting and enlightening discoveries 10. make a fantastic journey to the centre of the Earth
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