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(共19张PPT)
Lesson 7 Planting Trees
Learning Aims
1. Listen,speak ,read and write these words:
hole, large,cover,fill,storm,dirty,northern,bottom
2.Listen,speak and read these words: root,seedling,dirt,pack,dust
3.Read the text and know about how to plant a tree.
4.Tree planting is very important work.
We must do something to protect the environment.
Lead-in
If there are no trees ,how do you like the world
A dust storm
Rich lands turn into dessert.
Think about
1.When is Tree Planting Day in China
2.Have you planted trees
hole n. 洞
large adj. 大的,巨大的
root n. 根
seedling n. 秧苗,幼苗
cover v. 覆盖 n. 盖子
fill v. (使)充满,(使)装满
dirt n. 泥土,污物
pack n. 堆积,压实,装箱
dust n. 沙土,尘土,灰尘
storm n.暴风雨
dirty adj. 不干净的,肮脏的northern adj. 北方的,北部的
bottom n.底部,最下部
New Words
Learn the New Words
1. hole n. 洞 ，洞穴[C] dig a hole 挖洞，挖坑
eg: There is a big hole in the road.
2. large adj. 大的,巨大的(larger,largest)
eg: The room must be large enough to hold so many people.
3.root n. 根[C] the root of... ...的根
vt.清除，根除
eg: Don't hurt the roots of the flowers.
You can't root anything in my computer.
4. seedling n. 秧苗,幼苗[C]
eg: We should take good care of the seedlings of the tree.
5. cover n. 盖子,封面[C] the cover of... ...的盖子/封面
v. 覆盖
(1)cover A with B 用B覆盖A (主动语态)
eg: Please cover the roots with dirt.
(2) A be covered with B A被B覆盖（被动语态）
eg: The road was covered with snow this morning.
Learn the New Words
6. fill v. (使)充满,(使)装满
(1) fill...with... 用...装满...(主动语态)
eg: Please fill the bottle with hot water.
(2) be filled with... 被装满...(被动语态)
=be full of... 充满
eg: The bottle is filled with hot water.
=The bottle is full of hot water.
(3) fill in 填写 fill the blanks with the words 用这些单词填空
Learn the New Words
8.pack vt. 堆积,压实,装箱,打包 pack sth.
eg：Pack the dirt around the tree.
He packed his bagpack quickly when he heard the news.
7. dirt n. 泥土,污物[U]
dirty adj. 不干净的,肮脏的
eg: His glass is very dirty because it is filled with dirt.
Learn the New Words
9. dust n. 沙土,尘土,灰尘[C]
10. storm n.暴风雨 dust storm 沙尘暴
eg: There will be a dust storm in Xi'an tomorrow.
11.northern adj. 北方的,北部的
in the northern area 在北部地区，在北方
12.bottom n. 底部，最下部
in/at the bottom of... 在...的最底部
eg：Put some water in the bottom of the hole.
Learn the New Words
Read
Read the lesson and answer the following questions.
1. What are Li Ming and his classmates doing on March 12
2. Why do many people come to plant trees
They are planting trees as a school project.
Because the environment is changing and they want to do something to help.
5.Put a little water in the bottom of the hole.
1.Dig a hole.
2.Put the seedling into the hole.
3.Cover the roots and fill the hole with dirt.
4.Pack the dirt around the new tree .
Retell the steps of planting trees. ( Let 's do it 2)
Phrases
1. Tree Planting Day 植树节（ March 12）
2. plant trees=plant a tree 植树，种树
3. by the way 顺便说一下
4. turn into 变成
5. for sure 肯定地
Sentences
1. Maybe you should make the hole a little bigger .
2. It must be large enough to hold the roots of the seedling.
3. Many people are worried because the environment is changing ,and they want to do something to help .
4. These changes are serious. When there is a dust storm in spring , it gets windy and dirty everywhere .
5. Ms. Liu told us the wind blows the dirt and the sand here from the north.
6. Nothing can stop the wind because there are not many trees left.
7. A lot of rich lands in the northern area have turned into desert .
Sentences
8. I suppose tree planting is very important work .
9. It's also a great way to learn about nature .
10. It's fun and important to plant plants .
Sentences
The Green Great Wall was built across_________ of the country . What is the Green Great Wall It is made up of strips of human-planted forest.
Each year ________ blow a lot of soil off the land.Things are getting more and more serious.About 3600 square kilometres of glassland are taken by the Gobi Desert every year .
The Green Great Wall project started in 1978.By _________,people hold back the expansion of the desert and raise northern China's forest coverage by 5% to 15%. By the year 2050, _________will be about 2800 miles long.
Complete the passage with the missing phrases.
A. the Green Great Wall B. planting more trees
C. dust storms D. the northern part
Work in Pairs
Read the lesson and the passage above again.Why should we plant trees Talk about it and list at least three reasons.
When there is a dust storm in spring , it gets windy and dirty everywhere .
A lot of rich lands in the northern area have turned into desert .
Each year , dust storms blow a lot of soil off the land .
More reasons...
Homework：
1.Finish your exercise book.
2.Retell the steps of planting trees.
3.Talk about the importance of planting trees.

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