资源简介

(共34张PPT)
Unit5
Looking into nature
Listening and speaking
In this class, you will
listen and get basic information about a boiling river in the Amazon；
tell the difference between facts and people's opinions ；
master language structures and vocabulary for expressing possibilities;
develop curiosity about nature's mysteries.
What insights do you have
Nature is magnificent and full of secrets.
What secrets of nature do these pictures show
the black hole
黑洞
the Bigfoot
大脚野人
the Loch Ness Monster
尼斯湖水怪
黑洞是时空曲率极大、连光也无法逃逸的天体。它由大质量恒星坍缩形成，核心是奇点，外围是光无法脱离的视界，是宇宙中的神秘“引力陷阱”。
大脚野人是传说中存在于北美森林、身形巨大、浑身长毛的类人猿神秘生物，常被称为“沙斯夸支”。尽管有多起目击报告和模糊影像，但至今缺乏确凿的科学证据证实其真实存在。
尼斯湖水怪是传说栖息在苏格兰尼斯湖的神秘生物，常被描述为长颈蛇形水兽。最著名的“外科医生照片”后被证实为伪造，科学解释多指向巨鳗、波纹或木头等误认。
PPT GROUP
PAGE 8
Look and answer.
What secrets of nature do these pictures show
the Bigfoot
大脚野人
the Loch Ness Monster
尼斯湖水怪
the black hole
黑洞
the beginning of
the universe
宇宙起源
DID YOU KNOW
Nature is full of secrets. They are waiting to be explained. These include black holes, the beginning of the universe, the Loch Ness Monster and Bigfoot. These secrets awaken our curiosity and drive scientists to better understand the wonders around us.
A group of people are on a guided tour. The guide is talking about an unsolved secret of nature.
1. Listen to the talk and choose the correct topic.
a. A disappearing river in South America.
b. The life of the people in the Amazon rainforest.
c. A boiling river in the Amazon rainforest.
While-listening
Listen again and complete the profile.
the facts about the river
It is a boiling river as hot as 1_______________℃.
the people’s activities
They 2_______________ with it.
They clean with it.
They make 3___________with it.
They sometimes go swimming in it,but only after 4__________.
the speaker’s opinion
It’s one of the most 5____________________ of the rainforest.
86
cook
tea
heavy rain
amazing wonders
While-listening
Guide: Welcome to the Amazon Rainforest! Now, I'd like to present a special river to you. Since ancient times, people have talked about a boiling river in the rainforest. Many people laugh at this story, but in fact, it's true! The water can be as hot as 86°C. People here cook with it, clean with it and make tea with it! There's no need to make a fire! The water only cools down after heavy rain. Then people go swimming in it. I think it's one of the most amazing wonders of the rainforest.
生火
降温
While-listening
Watch and know the boiling river.
How did the boiling river come into being
The tourists and the guide are having a heated discussion.
While-listening
Tourists’ ideas
The guide’s opinions
The ancient people’s idea is possible. There’s much1_________________.
It’s unlikely for the sun to 2____________________that much.
Perhaps the river passes a volcano and 3___________________
That’s not the reason. The nearest volcano is about 4________________
away.
Maybe there are some chamicals 5________________. They can 6_________________heat.
That’s 7___________________, but scientist haven’t found any yet. More 8_________________is needed.
Listen to the conversation and complete the table.
heat the river
becomes hot
700 kilometres
in the water
possible
research
sunshine
produce
While-listening
Guide: Ancient people here thought that the sun makes the river hot.
Boy: It's possible, right There's a lot of sunshine here.
Guide: Actually, it's unlikely for the sun to heat the river that much. Just think of outdoor swimming pools. Would the water get to 86°C in summer
Girl: You're right. But how about volcanoes Perhaps the river passes a volcano and becomes hot
Guide: Good guess! But I'm afraid that's not the reason. The nearest volcano is about 700 kilometres away.
Girl: I have another idea! Maybe there are some chemicals in the water. They can produce heat. I've studied them at school.
Guide: That's possible. But scientists haven't found such chemicals in the river yet. They need to do more research…
How many possible reasons are mentioned in the conversation
What are they
The sun makes the river hot.
Perhaps the river passes a volcano and becomes hot.
Maybe there are some chemicals in the water.
While-listening
Guide: Ancient people here thought that the sun makes the river hot.
Boy: It's possible, right There's a lot of sunshine here.
Guide: Actually, it's unlikely for the sun to heat the river that much. Just think of outdoor swimming pools. Would the water get to 86°C in summer
Girl: You're right. But how about volcanoes Perhaps the river passes a volcano and becomes hot
Guide: Good guess! But I'm afraid that's not the reason. The nearest volcano is about 700 kilometres away.
Girl: I have another idea! Maybe there are some chemicals in the water. They can produce heat. I've studied them at school.
Guide: That's possible. But scientists haven't found such chemicals in the river yet. They need to do more research…
Are the tourists sure of their ideas How do you know
No, because they used possible words, like maybe,perhaps and so on.
Underline the words or expressions about possibilities.
Talking about possibilities
Could, may and might are used to talk about possibilities. Words such as maybe and perhaps are used, too. We can also use the structure It's certain / likely / possible that...
Learning to learn
Post-listening
What other unsolved secrets of nature do you know
#麦田怪圈(Crop circle)指农田中一夜出现的巨型几何图案，成因充满争议。部分已被证实为人为艺术创作，但支持者认为复杂图案无法人工完成。科学界主流观点认为，多数是人为制造，少数可能由天气等自然因素形成，尚无证据表明与外星人有关。
Post-listening
What other unsolved secrets of nature do you know
#亚特兰蒂斯（Atlantis）传说中拥有高度文明的古老大陆，因地震和海啸沉入海底。最早见于古希腊哲学家柏拉图的著作，是无数文艺作品的灵感来源，但至今仍未被证实其真实存在。
Post-listening
What are the possible explanations about them
Crop circle
Atlantis
Some people make them as a fun trick
They're caused by strong winds or special natural forces
Maybe the aliens made it.
Perhaps There was an island,something made the island sink into the sea.
An earthquake might have caused it.
The city disappeared because of rising sea levels.
Post-listening
Work in pairs. Choose one unsolved secret of nature and talk about possible explanation.
Crop circle
Atlantis
Useful expressions
·The truth may be...
·It is likely that...
·Perhaps it's because...
·It's probably a result of...
·There is a (strong) possibility that...
·It's possible that...
·There's a chance that...
Have you heard of...
Yes, it's very strange. I'm curious about the possible reasons.
Perhaps it's because...
Post-listening
Work in pairs. Choose one unsolved secret of nature and talk about possible explanation.
Crop circle
Have you heard of crop circles(麦田怪圈)
Yes, it's very strange. I'm curious about the possible reasons.
Perhaps it's because some people make them as a fun trick.
Some people make them as a fun trick
They're caused by strong winds or special natural forces
Maybe the aliens made it.
...
Hmm, it's unlikely that all crop circles are tricks some look too neat and perfect. It is likely that they're
caused by strong winds or special natural forces
That sounds possible! Do you have another idea
Well, some people say it's from aliens. But there's a small chance that aliens would do this—it's hard to believe.
Yeah, that's not very likely. There's a chance that scientists will find the real reason later!
I hope so—this mystery is really interesting!
Post-listening
Work in pairs. Choose one unsolved secret of nature and talk about possible explanation.
Have you heard of ____________
Yes, it's very strange. I'm curious about the possible reasons.
Perhaps it's because _______________________.
...
Hmm, it's unlikely that ____________________. It is likely that _____________________.
That sounds possible! Do you have another idea
____________________. But there's a small chance that ________________________.
Yeah, that's not very likely. There's a chance that scientists will find the real reason later!
I hope so—this mystery is really interesting!
Atlantis
Perhaps There was an island,something made the island sink into the sea.
An earthquake might have caused it.
The city disappeared because of rising sea levels.
Nature is full of amazing secrets. We should keep curious and keep exploring.
大自然充满神奇的秘密，我们应保持好奇，不断探索。
The world is full of wonders. To understand nature, we need science, not just guesses.
世界充满奇迹，理解自然需要科学，而非仅仅猜测。
Phonetics in use
Stress in words
A word can be stressed on different syllables. If we stress the second syllable, the word is usually a verb. For example, present describes the time, while present describes an action.
record a world record / record the temperature
produce fresh produce / produce oxygen
perfect a perfect gift / perfect her skills
desert the biggest desert on earth / desert his duty
record a world record / record the temperature
produce fresh produce / produce oxygen
record n.重音在前 / rek. rd/：“记录、唱片”，“世界纪录”。
record v.重音在后 /r k rd/：“记录、录制”，“记录温度”。
produce n.重音在前 / prɑ du s/：“农产品”，“新鲜农产品”。
produce v.重音在后 /pr du s/：“生产、产生”，“产生氧气”。
perfect a perfect gift / perfect her skills
desert the biggest desert on earth / desert his duty
perfect adj. 重音在前 / p rf kt/：“完美的”，“完美的礼物”。
perfect v. 重音在后 /p r fekt/：“使完美”，“完善她的技能”。
desert n. 重音在前 / dez. rt/：“沙漠”，“地球上最大的沙漠”。
desert v. 重音在后 /d z rt/：“抛弃”，“抛弃他的职责”。
Language points
1. A boiling river in the Amazon Rainforest
boiling [形容词] 很热的，滚热的
可在句中作表语或定语。其动词形式为 boil, 意为“（使）沸腾，煮沸，烧开”。
Can I open a window It’s _______ in here.
我开扇窗好吗？这里热死人了。
It was a _______ hot morning.
那是一个奇热无比的早晨。
boiling
boiling
2. It is a boiling river as hot as 86°C.
as...as... 与……一样……
两个 as 中间用形容词或副词的原级。其否定结构为 not as...as...，意为“不如……那样……”。
He sings ___ loudly ___ Bill.
他唱得和比尔一样大声。
as as
3. It’s unlikely for the sun to heat the river that much.
unlikely [形容词] 未必会发生的, 不大可能的
其反义词为 likely (可能的)。unlikely 的
常见结构如下：
① be unlikely to do sth 不大可能做某事
The project ________________ succeed.
这个项目不大可能成功。
② It’s unlikely + that 从句。……不大可能。
_________________ she’ll arrive before seven.
她不大可能在七点前到达。
was unlikely to
It’s unlikely that
4. I'm curious about the possible reasons.
be curious about 对……感到好奇
其中，curious 是形容词，意为“好奇的；求知欲强的”。
be curious to do sth
对做某事感到好奇，很想做某事
They _______________________ the new neighbour. 他们对新来的邻居感到很好奇。
were very curious about
Unit5
Looking into nature
Thank you!
Listening and speaking

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