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外研版九年级上册
A fine balance
Developing ideas (1)
Unit 5
Learning objectives
1.通过听力活动，获取雨林的重要性、面临的问题及保护措施等信息，理解广播节目的主要内容；
2.理解语篇中的因果关系，梳理语篇结构，学习运用表示顺序的词语介绍事物的工作原理；
3.介绍 Topher White 的发明及其工作原理，并表达个人观点，体会科技赋能生态保护的价值。
通过本节课的学习，学生能够：
重点
重点
1. What is the man doing
2. Why does he do this
3. How does this influence nature
He is cutting down trees.
He may do this for sale or building houses.
Some animals may lose their homes. It does great harm to the environment.
Look at the picture and answer the questions.
logging
n. 伐木
in the forest
Look and answer
Logging means cutting down trees (often for sale). Some logging is against the law and does great harm to the environment. But logging is often hard to notice in rainforests.
2. How do you feel about logging
1. What does logging mean
Read and answer
Cutting down trees, often for sale.
I feel upset and worried about logging. Many trees in the rainforest are cut down. It destroys animals’ homes and breaks the balance of nature...
Read the short text and answer the questions.
3. Why is it hard to notice logging in rainforests
It is hard to notice logging in rainforests. The rainforest is huge and thick with plants. People cannot easily see what is happening deep inside the forest...
A class is having a geography lesson. The teacher is going to talk about rainforests. What do you think the teacher will talk about
Listen and choose
Location
Importance
Animals
Plants
Climate
Listen to the beginning of a lesson and choose the things mentioned.
a Where you can find rainforests.
b Why rainforests are important.
c What animals live in rainforests.
d Why rainforests are disappearing.
Listen and choose
1. What type of text is it
2. What is a quiz used for
To test how much we know about something.
It’s a quiz about rainforests.
Scan and answer
Scan the text of Activity 2 and answer the questions.
Read and predict
Read the statements. Underline the key words and predict True or False.
What key words might you hear about why rainforests are important
also
because / since
so
— adding information
— giving reasons
— showing results
Listen and tick
Listen again and tick True or False.
Work in pairs. Take turns to be the Quiz Master and the Quiz Challenger.
Student A:
Read a statement about rainforests.
False! They are called “the lungs of the earth” because they produce oxygen.
Rainforests are called “the heart of the earth”.
Student B:
Decide whether it is True or False and give the correct answer.
Quiz time
Read the “Phonetics in Use” box and learn how function words are pronounced in sentences.
Read, learn and listen
Now, let’s listen to the sentences and underline the function words pronounced weakly.
Rainforests cover only about 6% of land. However, they are home to more than half of the animals and plants on the earth.
of are to the and on
Weak forms
/ v/ / / /t / / / / n/ / n/
Listen and decide which words are unstressed.
Listen, decide and repeat
1 We should protect nature because we only have one earth.
2 Nature gives us clean air to breathe, fresh water to drink, and food to eat.
3 When we take care of nature, we’re also taking care of ourselves.
Now listen again and repeat.
Read and predict
A radio programme is introducing a useful way to protect rainforests. Read the notes and find out what the programme is about.
THE PROBLEM
THE SOLUTION
HOW IT WORKS
THE RESULTS
Listen and complete
against
difficult
ears
mobile phone
tied
catches the
noise
the place
10/ten
Listen to the radio programme and complete the notes.
太阳能电池板
/ lɑ m/ n.警报
/ɡɑ d/ n.警卫，门卫
Read the Learning to learn box. Then listen again and talk about how the presenter explains the working of the invention.
Read and listen
His invention uses an old mobile phone, a solar panel and a microphone. This is how it works: First, the invention is tied to trees. Next, an app on the mobile phone starts listening. When it catches the noise of cutting down trees, it sends an alarm to the forest guards. The guards can soon find the place and stop the logging.
This is how it works:
First
Next
When
Work in pairs
Talk about Topher White and his invention. Use the questions and useful expressions.
Think about:
What problem do the rainforests face
What did Topher do to help
How does Topher’s invention work
What do you think of his invention
Useful expressions
... invented a tool that uses...
... has helped save...
That’s really...
This is how it works: First, ... Next, ... Then, ... Finally, ...
That sounds like a good idea.
Let’s share
Share your conversation with the class.
Today we have learned to
explain how an invention works with First, Next, Then and Finally;
3
1
understand why rainforests are important and why they are disappearing
use because, since and as to recognize reasons;
2
Summary
recognize and pronounce weak forms of function words in sentences.
4
Exercises
1. Many trees are ______(cut) down every year.
2. Topher White’s ________(invent) uses an old mobile phone and a solar panel.
3. The app starts _________(listen) for the sound of cutting trees.
4. The device is _______ (tie) to a tall tree and listens.
5. The device sends an alarm to the forest __________(警卫).
cut
tied
guards
invention
listening
一、用括号内单词的正确形式或根据中文释义填空。
雨林是地球上一半以上动植物的家园。
农民砍伐树木，为他们的动物腾出更多空间。
雨林正因为人类活动而逐渐消失。
它的工作原理是这样的：首先，装置被系在树上。接下来，手机上的应用程序开始监听。
Rainforests are home to more than half of the animals and plants on the earth.
Farmers cut down trees to make more space for their animals.
Rainforests are disappearing because of human activity.
This is how it works: First, the device is tied to a tree. Next, an app on the mobile phone starts listening.
二、汉译英
Exercises
1. Retell how Topher White’s invention works with first, next, then, finally.
2. Write three suggestions for protecting rainforests. Give a reason for each suggestion using because, since or as.
Homework
Unit 5
外研版九年级上册
Thank you!

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