Unit 4 Our WorldUnit 4 Our WorldTopic 1 Plants and animals are Topic 1 Plants and animals are important to us.important to us.

Section CSection C

福州第四十中学 林 锌福建省石狮市光华侨联合中学初中部 王莎白

earth n. 地球；土，泥；大地rainforest n. (rainforest n. ( 热带热带 )) 雨雨林林

forest n. forest n. 森林森林

wood n. wood n. 木头，木材；木头，木材； woods woods 树木，森树木，森林林

Forests give us …

rubber n.rubber n. 橡胶橡胶

Read and understand1a ( 影片1

)

Read 1a again and complete the following tasks.

1. What does “cover” mean in this passage? A. set up B. spread over C. have D. form 2. We can’t get the answer to Question _________ from the passage. A. What are in rainforests? B. Why are rainforests important to us? C. What can we get from rainforests? D. What should we do to protect rainforests? 3. Why are rainforests “the lungs of the earth”?

4. What’s the main idea of the passage?

BB

Because the plants in the rainforests help to make the Because the plants in the rainforests help to make the air fresher. They also help to control the climate.air fresher. They also help to control the climate.

DD

Rainforests are very important to us.Rainforests are very important to us.

Key pointsKey points

• Rainforests Rainforests covercover 6% of the earth’s 6% of the earth’s surfacesurface..

six percentsix percent

• Thousands and thousands ofThousands and thousands of animals live in rainforests.animals live in rainforests.

成千上万的

成百上千的

成百万上千万的，数以百万计的

hundreds of

millions ofmillions of

Key pointsKey points

• But now rainforests are becoming smaller and smaller. 越来越小

“ “ 形容词比较级形容词比较级 +and++and+ 形容词比较级”形容词比较级”或“或“ more and more + more and more + 多音节形容词原多音节形容词原级”级”e.g. e.g. 天气变得越来越暖和了。天气变得越来越暖和了。The weather gets warmer and warmer.

中国越来越美丽。中国越来越美丽。

China is China is more and moremore and more beautiful. beautiful.

Key pointsKey points

Read 1a again and write down Read 1a again and write down the importance of rainforeststhe importance of rainforests..

• make the air fresher

• control the climate

• give us food, rubber, medicine and so on

1c Group work

Add your own opinions and then Add your own opinions and then report it to your class.report it to your class.

What covers most parts of the earth?

Water.

It’s in rivers, lakes, seas and oceans.

Read and understand2a ( 影片2

)

Complete the passage according to 2a.

Water is ___________ to all livingthings.All ________ and _________ need water. _________ also need water to drink, to cook and ______ _______ ._________ water, there could be no life on earth. So we must save water.

important

plants animals

Without

Humans to clean

• Water Water is necessary foris necessary for all plants. all plants.

• 对……来说，很必要对……来说，很必要

Grammar focusGrammar focus

• Humans need water to drink, to cook Humans need water to drink, to cook and to clean. and to clean. In factIn fact, water , water makes upmakes up the largest part of the human body.the largest part of the human body.

Grammar focusGrammar focus

实际上

形成，构成；和解

Number the following sentences to form a passage about how to plant a tree.

Spring is warm. It’s the best season to plant trees. When you plant a tree:

3 Work alone

• First, dig a hole in the earth, and make sure the hole is deep enough for a tree.

Step by stepStep by step

• Then, put the tree in the hole, and keep it straight.

Step by stepStep by step

• After that, fill the hole with earth, then make the earth hard with your feet.

Step by stepStep by step

Finally, water the tree. If everything is OK, the tree will grow new leaves a

few days later.

Step by stepStep by step

• Retell how to plant trees according to the pictures.Retell how to plant trees according to the pictures.

• 1 Are there rivers and lakes in your hometown?1 Are there rivers and lakes in your hometown?• 2 Is the water there dirty or clean? Why? 2 Is the water there dirty or clean? Why? • 3 Did you do anything useful to protect the 3 Did you do anything useful to protect the

clean water? clean water? • 4 What should we do to keep the water clean? 4 What should we do to keep the water clean? • 5 What would the world look like without 5 What would the world look like without

water? water? • 6 What should we do to save every drop of 6 What should we do to save every drop of

water?water?

Discuss the questionsDiscuss the questions

SummarySummary 1. Learn to describe the situation of

the rainforest and water and the

importance to the earth. 2. Talk about how to plant trees.

3. useful phrases: thousands of

control the climate

in fact

make up

smaller and smaller

fill the hole with earth

Homework Homework

• Make a survey Make a survey among your among your classmates about classmates about how to save water in how to save water in their family. Then their family. Then report it to the class report it to the class tomorrow.tomorrow.

Name Name WayWay

Thanks for Thanks for listening! listening!

Goodbye!Goodbye!