初中英语人教版（2024）八年级下册（2024）Section B课文内容ppt课件

这是一份初中英语人教版（2024）八年级下册（2024）Section B课文内容ppt课件，共25页。PPT课件主要包含了Sample 等内容，欢迎下载使用。
What natural wnders are they?
the Great Barrier Reef
Munt Qmlangma
the Mariana Trench
the Sahara Desert
the Yangtze River
the Yellw River
What special facts d yu knw abut these natural wnders? Chse ne and share with us.
Wrk in a grup. Chse a natural wnder (a river, lake, muntain, frest, waterfall, etc.). Then d sme research and make ntes.
小组合作。选择一处自然奇观（河流、湖泊、山脉、森林、瀑布等）。然后进行调研并做笔记。
Design a pster abut a natural wnder
Make a pster abut the natural wnder yu chse. Refer t the example n the right.
Read and answer the questins.
the wrld’s biggest rainfrest6 millin square kilmetres in sizein Brazil, Peru, Clmbia, and five ther cuntriescalled “the lungs f the earth”the largest variety f plants and animals in the wrld
a variety f 各种各样的
What’s the natural wnder?
What size is it?
What’s its lcatin(位置)?
Amazn Rainfrest.
In Brazil, Peru, Clmbia, and five ther cuntries.
It’s 6 millin square kilmetres in size.
What special facts d yu knw abut it?
It’s wrld’s biggest rainfrest.It’s called “the lungs f the earth”.It’s the largest variety f plants and animals in the wrld.
Sample pster
•the largest waterfall in China•lcated in Guizhu Prvince•101 metres wide and 77.8 metres high•raring（咆哮的）water rushes dwn every secnd•peple can walk right behind the waterfall thrugh a natural cave
Huanggushu Waterfall
As a grup, give a reprt t the class. Pay attentin t the use f large numbers, cmparatives, andsuperlatives.
The Amazn Rainfrest is thewrld’s biggest rainfrest.It cvers 6 millin squarekilmetres. Yu can see mst fit in three cuntries, Brazil, Peru,and Clmbia …
Gd mrning, class! Tday we’d like t intrduce yu t Huanggushu Waterfall—the largest waterfall in China.Lcated in Guizhu Prvince, Huanggushu Waterfall is 101 metres wide and 77.8 metres high. The main waterfall alne is much wider than many small waterfalls nearby! Every secnd, raring water rushes dwn—it’s like a huge white curtain falling frm the sky.
What makes Huanggushu Waterfall even mre special is that yu can walk right behind the waterfall thrugh a natural cave. This gives travellers a much mre exciting experience than watching frm a distance. Huanggushu Waterfall attracts millins f curius travellers each year.If yu want t experience the greatest pwer f nature, Huanggushu Waterfall is the best place t visit! Thank yu fr listening!
What d yu knw abut the Sahara Desert?
Read the text and cmplete the mind map.
at least 4.6 millinyears ld
mst places are rcky; sme have grass, lakes，muntains and even sand seas
abut 10 per cent larger than what it was abut a century ag
abut 9 millin squarekilmetres
Discuss the questins.
1. Hw is life in the desert different frm ther places where peple live?
Life in the desert is much harder. First f all, it is hard t find water, and peple usually mve frm place t place. What’s mre, the weather in the desert is very dry and ht. In ther places, peple usually have stable hmes and enugh water. The weather is better than that in the desert.
2. Wuld yu like t visit the Sahara Desert r even live there fr a while? Why r Why nt?
I wuld like t visit the Sahara Desert. Because I want t see its amazing landscapes, like sand seas and the rcky grund./I dn’t want t live there. Because it’s t ht and difficult t find water.
3. What d yu think will happen if the Sahara keeps getting bigger? What shuld we d abut it?
If the Sahara keeps getting bigger, I think mre land will dry up, and peple and animals there may lse their hmes. We shuld take effective measures, such as reducing pllutin, planting mre trees, and saving water.（答案不唯一，仅供参考）
Lcated in Africa, the Sahara Desert spreads acrss 30 per cent f the cntinent. This vast desert, als knwn as “the great desert” in Arabic, is abut 9 millin square kilmetres in size. It is als at least 4.6 millin years ld. This means that it is ne f the ldest places in the wrld.
The Sahara Desert
Read and learn
All deserts are dry, and the Sahara is bth dry and ht. It is the largest ht desert in the wrld. We may think that all deserts are ht, but in fact sme deserts are very cld! Many scientists believe that Antarctica, fr example, is a type f cld desert.
Mst f the Sahara is rcky grund. But there are als places with grass, lakes, muntains, and even sand seas.
A sand sea is just what it sunds like—it lks like a sea f sand! When the wind blws, the sand lks like waves. Life in the Sahara is difficult. Abut tw millin peple live in the Sahara. They usually mve frm place t place. There is water in a few parts f the Sahara, and sme peple live in these places all year rund.
what引导的表语从句，说明沙海是什么样的
到处；从一个地方到另一个地方
不定式作目的状语，说明大耳朵的作用
Nt many animals can live in a place with such a dry and ht climate. They must adapt t survive. Camels, fr example, g fr a lng time withut drinking water.
When they d find water, they can drink mre than 100 litres f it in 13 minutes! Fennec fxes live in the desert t. They have large ears t help their bdies stay cl.
adapt t 适应某物
此处的d是强调助动词，当句中无其他助动词时，用于加强语气。
Tday, the wrld’s largest ht desert is getting even bigger. It is nw abut 10 per cent larger than what it was abut a century ag. But why is it grwing? Sme scientists believe that part f the reasn is climate change. As temperatures rise, summers in Africa grw htter and less rain falls. Water bdies get smaller and the grund gets drier and drier. If we d nt take effective measures, the desert will keep grwing!
比较级+and+比较级 越来越……
1. What new facts abut natural wnders have yu learnt?2. Can yu make cmparisns when talking abut natural wnders?3.Can yu use large numbers t give sme gegraphy facts?4.Can yu explain hw and why peple cnnect with nature?5. What are sme achievements that peple have made while explring nature?
Nature makes us wnder. That is why it is wnderful.