人教版（2024）八年级下册（2024）Section B课文内容课件ppt

这是一份人教版（2024）八年级下册（2024）Section B课文内容课件ppt，共40页。PPT课件主要包含了目标P44课前预习，boiling，make tea，Ancient，heated，chemicals，found，YesNo，Prediction，number等内容，欢迎下载使用。
Lk and answer the questins
1. What secrets f nature d these pictures shw?
3. Which f the secrets interests yu mst?
... interests me mst. Because it is... (unknwn / alive / ...)
2. D yu knw these natural secrets? Are they all in reality?
Lk and and match.
3. Which f the secrets interests yu mst?... interests me mst. Because it is... (unknwn / alive / ...)
A grup f peple are n a guided tur. The guide is talking abut an unslved secret f nature...
Lk and answer .
Which rivers have yu visited?
跨地理学科探究:沸腾河所处生态环境---形成条件
Climate: ht and wet
gegraphical lcatin：
There are many undergrund gelgical activities地壳运动
Suth America
There are many undergrund gelgical activities
Wrd bank:crustal mvement 地壳运动vertical mvement 垂直运动hrizntal mvement 水平运动vlcanic eruptin 火山爆发earthquake 地震
Listen t the talk and chse the crrect tpic.
Phnetics in use
bilinght make teain the Amazn rainfrest...
What’s special abut the river?
Remember and answer
What infrmatin shuld yu listen fr?
facts abut the river
the speaker’s pinin
Read and think.
peple’s activities
time/a phrase
Listen t the talk again and cmplete the mind map.
A biling river
Where:______________
Time:_________________
Writer’s pinin:It’s the ne f____________________
Temperature:_____________
Activities:
amazing wnders
Listen t the talk again and cmplete the prfile.
Read and learn.
What’s the speaker’s pinin?
Read alng with the radi.
Wrk in pairs. Intrduce the river t yur partner.
I’ve gt sme infrmatin abut the A biling river...
If yu are a turist, what questins wuld yu ask when visiting the Biling River?
Think and share.
Let’s listen t the guide and turists’ talk.
What is the cnversatin mainly abut?
Hw the biling river came int being.
a verb phrase
Listen t the cnversatin and cmplete the table.
heat the river
700 kilmetres / 700 km
in the water
Think and discuss.
1. Hw many pssible reasns are mentined in the cnversatin?2. Whse pinin d yu agree with? Why?3. Are the turists sure f their ideas? Hw d yu knw?
I think the last girl’s pinin is reasnable. Because ther pinins have their explanatins, but her pinin hasn’t been prved.
Listen again. Then talk abut hw the speakers discuss pssibilities.
It’s pssible, right?Actually, it’s unlikely fr the sun t heat the river that much.Perhaps the river passes a vlcan and becmes ht?Maybe there are sme chemicals in the water.That’s pssible.
Wrk in pairs and act this cnversatin ut
跨地理学科探究:沸腾河的前世今生---形成原因
The biling pint f water is 100℃. Undergrund heat can transfer t the river.
Wrds bank:Amazn rainfrest 亚马逊雨林vlcan 火山 gelgical structure 地质结构Heat transfer 热传递gethermal energy 地热biling pint 沸点
Why des water bil?
Investigatins f Gegraphy and Physics Knwledge:
1.In the Amazn rainfrest。 2.In Suth America。3.It has a ht and wet climate。4.The frmatin f Biling rivers related t undergrund magma and crustal fractures.(地下岩浆和地壳断裂) accumulates in the prus sedimentary rcks.(雨水积聚在多孔的沉积岩中)
跨地理、物理学科探究学习单
【设计意图】通过跨学科探究任务单，引导学生用英文回答关于沸腾河的地理位置，气候变化，形成原因的重要科研价值，可以鼓励当堂使用工具书进行词汇的查找，小组讨论后再进行展示表达。
结合听力文本、示意图和视频完成任务单
6.This water is heated by the heat f the Earth's cre.(地心热量)7.The magma flwed thrugh the cracks in the crustal rck layers and reach nearby.(岩浆顺着地壳岩层的裂缝流淌到附近)
The biling temperature is arund 100℃, which can kill living animals.
跨学科学习过程评价标准
【设计意图】以评促学，帮助鼓励学生进行跨学科探究进行自评以及互评，教师可根据具体情况做调整。
What ther unslved secrets f nature d yu knw?
Lk and say.
【设计意图】激活学生已有认知，激发学生探索未知，培养学生探索精神。
Wrk in pairs. Chse ne unslved secret f nature and talk abut pssible explanatins.
sentences expressing pssibility:
A: Have yu heard f the strange crp circles that appear in fields vernight?B: Yes, it’s very strange. I’m curius abut the pssible reasns.A: The truth may be that they are made by humans as a kind f art.B: It’s likely that sme peple create them fr fun r t make mney.A: Perhaps it’s because f sme special weather, like strng winds r unusual strms.B: It’s prbably a result f natural frces, but I dn’t think wind can make such perfect patterns.A: There’s a strng pssibility that they are related t smething else, like UFOs.B: It’s pssible that aliens are trying t cmmunicate with us thrugh these circles.A: There’s a chance that we will never knw the real answer.B: Yeah, it’s ne f the mst mysterius unslved secrets f nature.
Ttal:————————
Self reflectin.