资源简介

(共29张PPT)
The natural world
Unit 7
Welcome to the unit
Learning Objectives
By the end of the class, students will be able to：
1. read about different ecosystems;
2. learn about protecting ecosystem;
3. give suggestions on how to protect ecosystems;
4. better understand the importance of protecting ecosystems.
Learning Objectives
Bt the end of this lesson, we will be able to：
1. acquire and restate basic features, major species, and climates of ecosystems;
2. collaborate to describe ecosystem features;
3. reflect on the importance of protecting environment and respecting the rules of ecosystems.
Watch and answer
What makes up biodiversity
生物多样性
Watch and answer
What makes up biodiversity
ecosystem
biodiversity
plant
animal
virus
bacteria
fungi
/ eko s st m/
n. 生态系统
真菌
病毒
细菌
Ecological Display Board
生态展板
Look and answer
What can you see in this picture
Rainforests are home to over half of all the types of animals
and plants on earth.
Coral reefs look like rocks, but they support a lot of life in just a small area.
Ecological Display Board
生态展板
/ri f/
n. 礁
/ k r l/
n. 珊瑚
Look and answer
What can you see in this picture
Ecological Display Board
生态展板
Grasslands often lie between deserts and forests.
Look and answer
What can you see in this picture
Ecological Display Board
生态展板
The polar ice is home to animals like polar bears and penguins.
/ pe ɡw n/
n. 企鹅
Look and answer
What can you see in this picture
Ecological Display Board
生态展板
Read and tick
Learn from the facts below and tick the ones you already know.
Rainforests are home to over half of all
the types of animals and plants on earth.
Coral reefs look like rocks, but they
support a lot of life in just a small area.
Grasslands often lie between
deserts and forests.
The ice is home to animals like
polar bears and penguins.
Tourist Message Board
游客留言板
e.g. Wetlands act as nature’s sponge, storing water and preventing floods.
湿地就像大自然的海绵，储存水分并预防洪水。
Brainstorming
Discuss in groups, talking about other knowledge you know about ecosystems. And write them on the board.
_______________________________________________________.
_______________________________________________________.
_______________________________________________________.
Listen and complete
___________ in different places are home to different animals.
In Inner Mongolia, there are _______ and ______, but in Africa, there are ______ and ________!
It’s very _____ in deserts because there’s little rainfall.
The climate in deserts is so ______ that __________ animals and plants can live there.
The desert plants keep water ______________ and many animals there get water from these plants.
Grasslands
/ re n f l/
n. 降雨量，下雨
Kitty and David are talking about ecosystems. Listen to conversation. Fill in
the blanks with words or phrases you heard.
horses
cows
lions
giraffes
dry
awful
only a few
in their leaves
/ kla m t/
n.气候
Do you know anything about ecosystems, David
I know that grasslands in different places are home to different animals. In Inner Mongolia, there are horses and cows, but in Africa, there are lions and giraffes.
Oh, really Do you know anything about deserts
Listen and learn
Kitty
David
Well, it’s very dry in deserts because there’s little rain. And the difference in temperature between day and night is huge.
Kitty
David
Yes, the climate in deserts is so awful that only a few animals and plants can live there.
Kitty
It’s true. The desert plants keep water in their leaves and many animals there get water from these plants.
David
1. basic features
基本特征
3. major species
主要物种
2. climates
气候
Do you know anything about ecosystems, David
I know that grasslands in different places are home to different animals. In Inner Mongolia, there are horses and cows, but in Africa, there are lions and giraffes.
Oh, really Do you know anything about deserts
Listen and imitate
Kitty
David
Well, it’s very dry in deserts because there’s little rain. And the difference in temperature between day and night is huge.
Kitty
David
Yes, the climate in deserts is so awful that only a few animals and plants can live there.
Kitty
It’s true. The desert plants keep water in their leaves and many animals there get water from these plants.
David
Rules:
1. Choose a role
2. Work in pairs
3. Help and act
Assessment 评价 Pronunciation 发音 Fluency 流利 Cooperation 合作 Emotion
感情到位
Excellent Good OK Role-play
Kitty
David
What other fun facts about ecosystems do you know
Role-play to perform an Eco-talk Show!
Eco-Talk Show
生态脱口秀
Word Bank
rainfall temperature
hot cold
wet dry
wetland mangrove
(湿地) (红树林)
cacti(仙人掌) fragile(脆弱的)
fox
…
Do you know anything about ecosystems
I know...
Oh. Really Do you know anything about...
Well, it’s very...And/but/or/so...
Yes. The climate in...is so...that...
That’s all for our show. Thanks for watching!
Check your presentation
Present your report to the class.
Language correct form(形式正确)
accurate meaning(意义精确)
Content clear(描述清晰)
Performance tacit (合作默契)
relaxed (自然)
OK Good Excellent
Go forth under the open sky, and list to
Nature’s teachings.
—— William Cullen Bryant
到广阔的天地中去，聆听大自然的教诲。
——布赖恩特
句中的 so ... that...意思是“如此……以至于……”,引出结果状语从句。其中so是副词修饰形容词或副词。如:
The bag is so heavy that I cannot carry it.
这个袋子太重了，我提不动。
1. Yes, the climate in deserts is so awful that only a few animals and plants can live there.
并列连词 and、but、or和 so
我们可以用并列连词 and、but、or和so来连接单词、短语或者句子。如:
Our English teacher is kind and helpful.
我们的英语老师既和蔼又乐于助人。
The boy is not very tall but he runs very fast.
这个男孩个子不是很高，但跑得很快。
Do you often go home on foot or by bicycle
你通常回家是步行，还是骑自行车
2. Coral reefs look like rocks, but they support a lot of life in just a small area.
注意:并列连词可以用来表示并列关系、转折关系、选择关系或因果关系等。
并列连词 and 意思是“和,又”,表达并列关系。如:
Mike likes playing football and singing songs.
迈克喜欢踢足球和唱歌。
并列连词 but 意思是“但是”,表达转折关系,所连接的成分意思往往相反或相对。如：
The room was small but comfortable. 房间虽小,但很舒适。
并列连词 or意思是“或者”,表达选择关系。如:
Which do you like better, juice or coffee 果汁和咖啡,你更喜欢哪一个
注意: 在否定句中并列成分通常用or连接,而不用and。如:
I cannot speak Japanese or French. 我不会说日语和法语。
并列连词so意思是“因此,所以”,表达因果关系,常用来连接两个简单句。如:
It began to rain, so we went home.开始下雨了,所以我们就回家了。
注意:并列连词so和从属连词 because(因为)不能一起使用。
The dog was hungry, so we gave it something to cat. ( √ )
Because the dog was hungry, so we gave it something to eat. (×)
一、翻译句子
世界上一半的动植物生活在热带雨林中。
2. 珊瑚礁看起来像岩石，但它们在很小的区域内维持着众多生命。
3. 草原通常位于沙漠和森林之间。
Half of the world’s animals and plants live in rainforests.
Coral reefs look like rocks, but they support a lot of life in just a small area.
Grasslands often lie between deserts and forests.
二、填空题
The climate in deserts is ______ awful ______ only a few animals can survive.
Coral reefs look like rocks, ______ they are actually made of tiny living organisms called polyps.
Rainforests are home to half of the world’s plants ______ animals.
Polar ice ______ penguins a place to live and breed.
“Reduce plastic ______ protect the ocean!” (Choose or/and/so)
so
that
but
and
gives
and
三、判断题 （True or false）
Grasslands are usually located between deserts and forests.
The sentence “The desert is hot, but plants still grow there” uses but correctly.
The phrase “so...that...” is used to show a choice between two options.
In the sentence “I will buy you a book about ecosystems,” “you” is the direct object.
Penguins can be found in both the Arctic and Antarctica.
T
T
F
F
F
Try to make a popular science video by playing the roles of “museum guide” and “visitor” with your partner.
Basic homework
Practical homework
Write 3 sentences about ecosystems by using the structure of “so…that”.
Try to search for more ecological knowledge after class and share it in the next class.
Extended homework

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