内容正文:
Reading Plus
Miss Chen
The Wonders of Nature
Unit4
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Pre-reading
This class, explorers, we’re going on an adventure to the largest hot desert in the world.
Sand & Heat
Magic, mystery and stories of thousands of years old
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Presentation
Read the text quickly and answer
the following questions.
1.What kind of passage is it?
A.Exposition(说明文)
B.Narration(记叙文)
C. Argumentation(议论文)
2. Which kind of material is this text most likely from?
A. A geography book.
B. A history magazine
C. A science report
D. A tour guide
3. How many paragraphs are there?
6.
Tip:
The topic sentence usually lies at the beginning or the end of a paragraph.
Read and answer
Presentation
Read and answer
Match the main idea with each
paragraph.
How many parts can we divide the text into?
What’s the structure of this passage?
A. ①/ ②③④⑤/⑥
B. ①②/ ③④/ ⑤⑥
C. ①/②③/④⑤/⑥
Part 1:Basic facts-location,size, age
Part 2: Environment-climate(气候) and landforms(地貌)
Part 3: Life in the Desert-human life and animal life
Part 4: Problem & Warning-desert growth
Four.
Location:__________________________
Size:______________________________
Age:______________________________
Climate:______________________________
Life: ______________________________
Animals:______________________________
Some basic facts of the Sahara Desert:
in Africa
9,000,000 square kilometers
at least 4.6 million years old
hot and dry
camels and Fennec foxes
Skimming
difficult; two million people live here and they usually move around.
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Careful-reading
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.
Read para.1
What does the underlined word “vast” mean?
A. very big B.very cold C. very old
Reading tip:
use the definition or examples to help you understand the meaning of words.
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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.
Read para.2 and circle T and F
In the world, all deserts are dry and hot. T F
Sahara is the largest cold desert in the world. T F
Antarctica is a kind of cold desert. T F
some deserts are very cold
hot
Careful-reading
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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.
Read para.3
What is the Sahara like?
It’s rocky ground and there are also places with grass, lakes, mountains, and even sand seas.
sand seas with waves
Careful-reading
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Presentation
Read Part. 4&5 and complete the table.
Category Special ways to survive
People Move ____________________.
Live ___________ all year round.
Camels Can go for a long time ____________________.
Can drink __________________ of water in 13 minutes when they do find water.
Fennec foxes Have large ears to help their bodies ___________.
from place to place
near water
without drinking water
more than 100 litres
stay cool
Life in the Sahara is difficult, but people and animals adapt to survive.
Careful-reading
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Presentation
Read para.6 and answer the questions.
1. How much larger is the Sahara than about a century ago?
It is now about 10 per cent larger than it was about a century ago.
Careful-reading
Presentation
Look and think
Desert growth
8.2 million square kilometers
about 1920
Today
?
Sahara Desert area:
8.2 + 8.2 × 10% = 9.02
9.02 million square kilometers
► Reasons: ___________________________________________
► Future warning: ___________________________________________
根据美国《气候》杂志的研究数据
一个世纪前(约1920年):面积约为 820万平方公里
Climate change / hotter summers, less rain
If we don’t take effective measures, the desert will keep growing.
What other reasons might cause the Sahara to grow?
Our country has taken some measures to fight against the desert.
Can you name some of them?
Do you think they can be used to stop the growing of the Sahara?
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Presentation
Watch and think
Measures
Plant more trees
and grass
Make laws
Save water
Build windbreaks
...
With the development of our country and high technology, what kind of thing would you like to invent to stop the Sahara or other deserts from growing ?
Creative-thinking
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Presentation
Let’s cherish our earth and fight climate change to keep our world green and beautiful.
Protecting the desert is protecting our home; small actions today can stop the sand from swallowing tomorrow’s hope.
守护沙漠,就是守护我们共同的家园,今日的微小行动,能阻止黄沙吞噬明日的希望。
Must-do 必做
1.Draw a mind map of the passage and write down at least 3 useful ways to protect the deserts.
Choose to do 选做
1. Search for more information online about the Sahara and make a poster to call on people to help it.
Homework
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