资源简介

(共35张PPT)
Let’s review
Think：
What problems do astronauts face during space missions Share your ideas with your partner.
Examples:
① Astronauts must stick their sleeping bags to the wall.
② If astronauts do not exercise regularly, they will get very weak.
③ ...
Pre-listening
Look at the picture and think:
① What can you see in the picture？
② What problem do you think this lesson will be about Is it a big problem
Space junk. I think it could be a big problem because...
You will listen to a lecture about space junk. Can you guess which topics the speaker will mention
What is space junk
Where does it come from
Why is it a big problem
What can we do about it
While-listening
1. Listen for the gist—check your predictions
Tick the things mentioned in the lecture.
What is space junk
Where does it come from
Why is it a big problem
What can we do about it
√
√
√
The main idea of the lecture:
What space junk is and why it is a big problem to us.
While-listening
2. Match the sections with key words—build the structure
① What is space junk
② What types of space junk are there
③ Why is space junk a big problem
A. The dangers of space junk
B. The definition of space junk
C. Examples of space junk
While-listening
Detailed listening
Tip:
Read the questions before you listen. Pay attention to key words from the questions (e.g. gloves, satellites, rockets) while you listen to the lecture.
While-listening
Detailed listening (Activity 3, P104):
Tip:
Read the questions before you listen. Try to connect the questions to the topics of the different parts of the lecture. Pay attention to key words from the questions (e.g. gloves, satellites, rockets) while you listen to the lecture.
A & B
C
C
√
√
√
√
√
√
Which part do these questions refer to
Definition
Types of space junk
Dangers of space junk
Space junk Definition __________ in space, (e.g. parts of old __________)
Types of space junk __________ that stopped working and couldn’t be brought back
things dropped by __________ during the spacewalk (e.g. cameras, __________, tool bags)
Dangers of space junk can __________ a spacecraft or satellite
creates more junk in __________
can make space missions very __________, and even make space travel __________
While-listening
Detailed listening: Listen again and complete the notes.
unwanted objects
rockets
satellites
astronauts
gloves
destroy
orbit
dangerous
impossible
Post-listening (Read audio script)
There are tens of thousands of man-made objects in orbit around the Earth. Many of them are useful things, like space stations and weather satellites. However, people have left lots of unwanted objects in space too, such as parts of old rockets. These objects are known as space junk.
Since the 1950s, people have sent over 10,000 satellites into space. Many of these satellites have stopped working, but they are still in orbit because it is too expensive to bring them back to the Earth. Astronauts have also dropped things during their spacewalks, such as cameras, gloves and tool bags. These objects continue to orbit the Earth as space junk.
Space junk is a big problem, and it is getting worse. Every year, we send more and more things into orbit, and this means more and more space junk in orbit too. Most pieces of space junk are very small, but they can still be very dangerous. Objects in orbit, such as satellites and spacecraft, are all travelling very, very fast. This means a small piece of space junk can destroy a spacecraft or satellite. When this happens, the spacecraft or satellite is broken up into hundreds of pieces, and there will be even more space junk in orbit.
Scientists are very worried about space junk because it can make space missions very dangerous. If there is too much space junk in orbit, it will become impossible to travel into space. Countries around the world need to work together to solve this difficult problem.
What can we do to solve the problem of space junk
Post-listening
Pair work
Can satellites be recycled Are there ways to make this easier
Should there be laws about cleaning up space junk
Can astronauts do anything to avoid dropping things during spacewalks
Can we build machines that can collect space junk
Come up with solutions to the problem.
Post-listening
Give a summary of the lecture. Use the notes below to help you.
Solutions
Build machines that can collect space junk, ...
Look & answer
What can you see in the picture
Where is it
Do you think it will be possible for humans to visit Mars
Do you think Chinese astronauts will land on Mars in the future
Will humans one day live on Mars Why or why not
Listen to a dialogue.
What are they talking about
Read the dialogue with your partner.
More examples of expressing possibility and impossibility.
Let’s debate!
Will it be possible for humans to live on Mars in the future
Step 1 Pick your side!
Team A (We CAN live on Mars in the future)
vs
Team B (We CAN’T live on Mars in the future)
Let’s debate!
Step 2 In your team, look at the facts below. Discuss which of these facts support your opinion. Then find more facts.
→ Team A: You think that humans will be able to live on Mars in the future.
→ Team B: You don’t think humans will be able to live on Mars in the future.
Facts that support Team B’s opinion.
Facts that support Team A’s opinion.
Can you think of more evidence（证据） to support your opinion Discuss and write down 2–3 strong points for your team.
Let’s debate!
State your opinion. Provide facts and reasons that support your argument.
You can use phrases like “It is likely that …” or “It is unlikely that …” to show that something is / isn’t possible.
Listen to the other team’s response. Pay attention to their arguments and think of ways to respond.
Continue debating until the time is up.
My opinion: Humans will / will not be able to live on Mars.
Reason 1: __________
Example 1: __________
If the other team ________, we will say ________________.
Self-assessment
评价内容 评分（1–5）
1. 我能记录太空垃圾的相关信息。 1 2 3 4 5
2. 我能用已学知识讨论解决太空垃圾问题的相关举措。 1 2 3 4 5
3.我能正确运用表达“可能性与不可能性”的相关句式。 1 2 3 4 5
4. 我能与同伴就未来能否移民火星展开辩论。 1 2 3 4 5
Homework
基础作业
模仿录音，流利朗读课本第107页的例句和对话。
拓展作业
就移民火星可能存在的某一问题，撰写一篇短文说明解决方案，要求至少使用两个课堂所学句型，如 “It’s likely that ... ”，“There is a good chance that ... ”。
上网查找“天问”火星探测任务的相关内容，并记录以下信息：Time → What happened → Why it’s important，为Project做好准备。
space junk /9speIs dZVNk/ n. 太空垃圾
There is a lot of space junk floating in Earth’s orbit.
lecture /9lektSR(r)/ n. 讲座；演讲
The professor gave a lecture on space exploration.
satellite /9s tRlaIt/ n. 人造卫星
We can sometimes see a satellite in the night sky.
spacecraft /9speIskrA:ft/ n. 航天器；宇宙飞船
The spacecraft is set to launch for a deep-space mission.
destroy /dI9strOI/ v. 摧毁
The big fire will destroy the old house.
mission /9mISn/ n. 任务；使命
The spacecraft’s mission is to study planets that are far away.
unwanted /Vn9wBntId/ adj. 无用的；多余的
Unwanted tools in space become space junk.
continue /kRn9tInju:/ v. 继续；持续
If not controlled, space junk will continue to increase.
be broken up into 被分解成；被拆分成
A large piece of space junk can be broken up into smaller pieces.
average /9 vRrIdZ/ adj. 平均的
I am of average height for my age.
probable /9prBbRbl/ adj. 很可能发生（或存在等）的
It is probable that we will have a test next week.
possibility /0pBsR9bIlRti/ n. 可能性
There is a possibility of rain this afternoon.
progress /9prRWGres/ n. 进步；进展
He has made great progress in English.
north pole 北极
There is ice on Mars’s north pole.
survive /sR9vaIv/ v. 生存；存活
Astronauts need a supply of oxygen to survive in space.
be most similar to 与……最相似
My bike is most similar to yours.

展开更多......

收起↑