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初二教案 第743期
发布时间:2021-06-21

45/743期初二教案

栗红梅

 

Astronauts lift off (P2)

 

 

I. Pre-reading

·Why do we go to space? Watch this video and tell us what you think.

  https://www.yxgapp.com/why-do-we-go-to-space/

 

Predict

·What was special about this “lift off”?

 

II. While reading

·launch v. 发射(卫星、导弹等);投掷;使升空

  e.g. In 1970,China successfully launched a man-made satellite(卫星).

 

·the first manned mission 第一次载人任务

  Tiangong space station天宫空间站 

  China Manned Space Agency 中国载人航天局

 

·Why was this launch special?

  It is the first manned mission to take place as part of the construction of China’s Tiangong space station.

 

·the cargo ship Tianzhou 2天舟二号货运飞船

 

·docking (对接)“天和核心舱,它是我国空间站最为重要的组成部分,是空间站的管理与控制中心。

 

·What did Shenzhou 12 do after entering orbit?

  It completed a fast automated docking with the space station core module Tianhe.

 

·How long did it take the astronauts to reach the space station?

  6.5 hours.

 

·deputy director designer 副主任设计师

 

·What will provide a comfortable environment for the astronauts on the station?

  The Tianhe’s cabin.

 

·cabin n. 座舱;隔间

 

·What is the astronauts’ main task?

  They will help build the space station.

 

Read the sentences and mark them true (T) or false (F).

1. Tianzhou 2 is a manned spacecraft. (F)

2. A high-speed train trip from Beijing to Hunan takes about 6.5 hours. (T)

3. The astronauts can’t contact their families while they’re in space. (F)

 

III. Further reading

Read the passage and fill in the blanks.

     On April 2, 2011, we said goodbye to Tiangong I, China's first space lab. According to the China Manned Space Agency (中国载人航天), Tiangong I re-entered Earth’s atmosphere (大气层) and some of its debris (碎片) fell into the South Pacific Ocean.

       There are many spacecraft (宇宙飞船) that are still in orbit (轨道) above Earth. After finishing their trips, they will all re-enter Earth's atmosphere like Tiangong I.         There are two types of re-entries: controlled re-entry and uncontrolled re-entry.

       Some satellites and manned spacecraft come back to Earth in a controlled re-entry. Experts calculate (计算) the path of the falling spacecraft and its speed. They can guide the spacecraft to fall in a chosen area.

       Some spacecraft may have problems while in space after a certain amount of time. These spacecraft come back in an uncontrolled re-entry. It is hard to tell when and where these spacecraft will fall until the last few hours. The US space station Skylab came back partially uncontrolled in 1979. Parts of the station fell in western Australia, but no one was hurt.

       During re-entry, most of the spacecraft will burn up while passing through Earth's atmosphere. Only a small amount of the debris will reach the ground. The debris typically ends up falling into the ocean, China Daily reported.

 

Fill in the blanks.

1.The debris from Tiangong I fell into the South Pacific Ocean.

2. When a spacecraft finishes its trip, it will re-enter Earth's atmosphere.

 

IV. Post reading

Group activity - Design a poster that describes the future of space travel.

 

 

 

 

 

 

Take a look at Earth’s new ocean (P6)

 

 

I. Pre-reading

·How many oceans do we have in the world?

·How are they divided up?

 

Predict

Look at the title:

·What are we going to read about?t

·Do you know where the new ocean is?

 

II. While reading

·You can probably name all four of the world’s oceans. But now it’s time to add another one to the list – the Southern Ocean.

 

·When is World Oceans Day?

  On June 8.

 

·non-profit 非营利的

  recognize v.辨别出; 承认; 意识到; (正式)认可

 

·What does the Southern Ocean refer to?

  The waters around Antarctica.

 

·ACC在南极洲周围从西向东流动,形成一个广泛的波动带,大致以南纬60度为中心,这条线现在被定义为南大洋的北部边界。

 

·How is the Southern Ocean separated from other oceans?

  By the Antarctic Circumpolar Current.

 

·ACC吸收了四大洋的海水,帮助驱动一个被称为传送带的全球循环系 统,在地球周围传递热量。

 

·What animals live in the Southern Ocean?

  The emperor penguin and the Weddell seal.

 

·Why is it important to recognize the Southern Ocean?

  Because of the problems it’s facing.

 

·What can students do by studying the Southern Ocean?

  They can learn more about the ocean and why it is important.

 

Read the sentences and mark them true (T) or false (F).

1. The National Geographic Society will make new maps to show the Southern Ocean. (T)

2. The Southern Ocean is saltier than the Pacific Ocean. (F)

3. You can see emperor penguins in the Indian Ocean. (F)

 

III. Further reading

The importance of the ocean

       As we know, the ocean is the glue that holds our planet together. Nearly three quarters of our planet is covered in saltwater, weaving its way around continents and circumscribing(确定...的范围) islands. The ocean is such a ubiquitous (到处存在的) part of our world that we mostly take it for granted (认为理所当然). 

       Why is the ocean important? Above all, the ocean has long been regarded as the cradle (摇篮) of life since the dawn of human history. Where there is ocean water, there is life. Secondly, the ocean buffers (缓和) our weather by maintaining the oxygen and carbon dioxide balance in Earth's atmosphere (大气层), as well as provides us with abundant (充裕的) food and many modern medicines that have been discovered from decades of relentless (不间断的) marine(海的) research. 

       Thirdly, the oceans are an adequate (适当的) source of life and have long been used by us for transport and recreation.    However, the ocean is also confronted (面临) with many problems. Pollution, oil exploitation, and other human activity have led to a decrease in the diversity(多样性) of marine life.

       So what can we do to protect the ocean and keep it in good condition for future generations? I believe that international organizations and governments should work out better rules and regulations to reduce pollution and protect the many plant and animal species that call it home.

       In addition, big companies should be conscious (意识) of their responsibility (责任) to protect the planet and behave accordingly. Individually, we can try to learn more about how to protect the marine ecosystem (生态系统) and support it. By doing these things, we can save the ocean and ensure its survival for generations to come.                  

 

1. What problems is the ocean facing? Give two examples.

  Pollution and oil exploitation.

 

2. What can people do to protect the ocean?

  We can try to learn more about how to protect the marine ecosystem and support it.

 

IV. Post reading

       What can you do to call on people to protect the world’s oceans? Work together with your group to find a creative and effective way to do this.

 


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