资源简介

Section B
Project+Reading plus
Unit 4
The Wonders of Nature
To design a poster about a natural wonder.
To learn some geographical facts about the Sahara Desert.
学习目标
1
2
Mariana Trench
Mount Qomolangma
Victoria Falls
Sahara Desert
Lake Baikal
Yellow River
The Great Barrier Reef
Dead sea
Say these natural wonders as quickly as you can.
Review
Natural wonders of the world
Name: ...
Location: ...
Size: ...
Plants and animals:...
Special facts:...
You can do some research by these ways:
Work in a group. Choose a natural wonder (a river, lake, mountain, forest, waterfall, etc.). Then do some research and make notes.
Project
4a
1.Title
2.Key information
Special facts: the biggest
size
Location
Special facts: called...
Special facts: the largest variety of...
3.Pictures
4.Design style
colours 色彩
layout 布局
Make a poster about the natural wonder you chose. Refer to the example on the right.
巴西，秘鲁，哥伦比亚
lung肺
variety种类
4b
Sample poster
?the largest waterfall in China
?located in Guizhou Province
?101 metres wide and 77.8 metres high
?roaring（咆哮的）water rushes down every second
?people can walk right behind the waterfall through a natural cave
Huangguoshu Waterfall
As a group, give a report to the class. Pay attention to the use of large numbers, comparatives, and superlatives.
The Amazon Rainforest is the world's biggest rainforest. It covers 5.5 million square kilometres. You can see most of it in three countries, Brazil, Peru, and Colombia ...
4c
Sample report
Good morning, class! Today we’d like to introduce you to Huangguoshu Waterfall—the largest waterfall in China.
Located in Guizhou Province, Huangguoshu Waterfall is 101 metres wide and 77.8 metres high. The main waterfall alone is much wider than many small waterfalls nearby! Every second, roaring water rushes down—it’s like a huge white curtain falling from the sky. What makes Huangguoshu Waterfall even more special is that you can walk right behind the waterfall through a natural cave. This gives travellers a much more exciting experience than watching from a distance. Huangguoshu Waterfall attracts millions of curious travellers each year.
If you want to experience the greatest power of nature, Huangguoshu Waterfall is the best place to visit! Thank you for listening!
Free Talk
What do you know about the Sahara Desert?
It is in ...
It is the ... in the world.
...
There is ...
Reading plus
Would you like to know more about the Sahara Desert?
Let’s read the passage below.
Tip: We can Identify the text type by key words, such as numbers, tenses, examples and so on.
What is the type of this passage?
A. A story
B. A new report
C. A popular science expository text
How do you know it’s a popular science
expository text?
1. Using numbers
2. Using Simple Present Tense
3. Using examples
科普说明文
4. Making a comparison (作对比)
Read and Think
Located in Africa, the Sahara Desert spreads across 30 percent of the continent. This vast desert, also known as " the great desert " in Arabic, is about 9 million square kilometres in size. It is also at least 4.6 million years old. This means that it is one of the oldest places in the world.
It is located in Africa.
1. Where is the Sahara Desert?
2. How large is the Sahara Desert?
It is about 9 million square kilometres in size and spreads across 30 percent of the African continent.
3. Why is the Sahara one of the oldest places in the world??
Because it is at least 4.6 million years old.
横跨，覆盖
/vɑ?st/广阔的,巨大的
be know as 以......文明
Read Para. 1 (location, size, age) and answer the questions.
Tip: We can use the number clue method(数字定位法), circle numbers quickly to find key information.
Read Para. 2 (climate) and fill in the blanks.
All deserts are dry, and the Sahara is both dry and hot. It is the largest hot desert in the world. We may think that all deserts are hot, but in fact some deserts are very cold! Many scientists believe that Antarctica, for example, is a type of cold desert.
Tip: We can use the transition word method(转折词定位法), find words like “but, in fact...” to catch comparison information.
{5C22544A-7EE6-4342-B048-85BDC9FD1C3A}
Climate
Places
All deserts
the Sahara Desert
Antarctica
dry
dry and hot
a type of cold desert
/?n?tɑ?kt?k?/ 南极洲
Read Para. 3 (geography) and circle T for true or F for false.
Most of the Sahara is rocky ground. But there are also places with grass, lakes mountains, and even sand seas. A sand sea is just what it sounds like—it looks like a sea of sand! When the wind blows, the sand looks like waves.
Tip: We can get detailed information by finding key words.
1. Most of the Sahara is sandy.
2. There are grass, lakes, mountains and sand seas in the Sahara.
3. A sand sea is a real sea with water.
4. When the wind blows, the sand looks like waves.
T
F
T
F
T
T
F
F
rocky ground
a sea of sand
Read Para. 4-5 (life) and answer the questions.
Life in the Sahara is difficult. About two million people live in the Sahara. They usually move from place to place. There is water in a few parts of the Sahara, and some people live in these places all year round.
Not many animals can live in a place with such a dry and hot climate. They must adapt to survive. Camels, for example, go for a long time without drinking water. When they do find water, they can drink more than 100 litres of it in 13 minutes! Fennec foxes live in the desert too. They have large ears to help their bodies stay cool.
1. Why do some people live in the same place all year round?
Because there is water in these parts of the Sahara.
2. What helps Fennec foxes’ bodies stay cool?
Their large ears help their bodies stay cool.
Tip: We can get detailed information by finding key words.
Today, the world's largest hot desert is getting even bigger. It is now about 10 percent larger than what it was about a century ago. But why is it growing? Some scientists believe that part of the reason is climate change. As temperatures rise, summers in Africa grow hotter and less rain falls. Water bodies get smaller and the ground gets drier and drier. If we do not take effective measures, the desert will keep growing!
According to some scientists, why is the desert growing larger??
Part of the reason is climate change. As temperatures rise, summers in Africa grow
hotter, less rain falls, water bodies get smaller and the ground gets drier and drier.
随着
keep doing sth一直做某事,继续做某事
采取有效措施
变得越来越干燥
Read Para. 6 (growth) and answer the questions.
Read the text and complete the mind map. Then retell the passage by the mind map.
Age
The Sahara
Desert
Size
at least 4.6 million
years old
Geography
Location
Growth
Life
most places are rocky; some have grass, lakes, mountains and even sand seas
in Africa
about 10 per cent larger than what it was about a century ago
difficult
about 9 million square kilometres
Complete and Retell
Discuss in groups and share your ideas about the following questions.
1. How is life in the desert different from other place where people live?
Life in the desert is rather difficult. To begin with, water is very hard to find, so people often have to move around. Besides, the desert weather is very dry and hot. However, people in other places can live in comfortable homes with enough water, and the climate there is much better. /...
2. Would you like to visit the Sahara Desert or even live there for a while?
Why or Why not?
Yes, I’d love to. Because I want to see the beautiful sand mountains and experience the special life in the desert./...
No, I wouldn’t. Because the weather there is too hot and dry. It’s hard to find water, and life is very difficult./...
Discuss and Share
3. What do you think will happen if the Sahara keeps getting bigger?
If the Sahara keeps growing, more land will become dry. It will be bad for the
climate and environment, and people and animals there may lose their homes.
(答案不唯一）
What should we do about it?
Fourth, everyone ought to take action to fight climate change.
Second, we’d better save water every day.
First, we should plant more trees and stop cutting down trees.
Third, we need to protect the environment together.
1. What new facts about natural wonders have you learnt?
2. Can you make comparisons when talking about natural wonders?
3. Can you use large numbers to give some geography facts?
4. Can you explain how and why people connect with nature?
5. What are some achievements that people have made while exploring nature?
你学到了哪些关于自然奇观的新知识？
在谈论自然奇观时，你能进行比较吗？
你能用大数字给出一些地理事实吗？
你能解释一下人们是如何以及为什么与自然联系起来的吗？
Nature makes us wonder. That is why it is wonderful.
大自然让我们感到惊奇。这就是为什么它很棒。
人们在探索自然的过程中取得了哪些成就？
Reflecting
Homework
? 预习Unit 5新单词。
? 独立制作一张关于家乡自然景观的英文海报，包含英文标题、至少3条关键信息（位置、规模、特色等），并增加一段“保护自然”的英文倡议。

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