(共23张PPT)
Lesson 4
Trees
Read
科普版小学英语第七册
(℃)
in danger
在危险中
Tree Planting Day
T
P
D
Read quickly 快速读课文， 回答问题.
It is Tree Planting Day tomorrow. Many people will go up to the hills and plant trees.
Trees can make the air clean. Animals and people can get food from them, too.
But people are cutting down too many trees. That will bring about great changes in the weather. It will be too cold or too wet in some places. It will be too hot or too dry in other places.
We must plant more trees. They will make the people healthy, and make our country more beautiful.
Where will the people plant trees
It is Tree Planting Day tomorrow. Many people will go up to the hills and plant trees.
Trees can . Animals and people can , too.
But people are cutting down too many trees. That will bring about great changes in the weather. It will be too cold or too wet in some places. It will be too hot or too dry in other places.
We must plant more trees. They will
, and .
What can trees do for us
make the air clean
get food from them
make the people
healthy
make our country more beautiful
Read again 再读课文， 回答问题.
fresh air
polluted air
healthy
健康的
Having breakfast every day, such as bread,
eggs and vegetables, can make the people ______.
healthy
Running can make the people healthy .
more
many
Read again and work in groups 小组讨论， 回答问题.
It is Tree Planting Day tomorrow. Many people will go up to the hills and plant trees.
Trees can make the air clean. Animals and people can get food from them, too.
But people are cutting down too many trees. That will bring about great changes in the weather. It will be too cold or too wet in some places. It will be too hot or too dry in other places.
We must plant more trees. They will make the people healthy, and make our country more beautiful.
What are the great changes
droughts
Follow the tape 跟读
It is Tree Planting Day tomorrow.
Trees can make the air clean.
But people are cutting down too many trees.
We must plant more trees.
Many people
will go up to the hills and plant trees.
Animals and
people can get food from them, too.
That will bring about great changes in the weather.
It will be too cold or too wet in some places.
It will
be too hot or too dry in other places.
They will make the people healthy, and make our country more beautiful.
It is Tree Planting Day tomorrow.
Many people
will go up to the hills and plant trees.
Trees can make the air clean.
Animals and
people can get food from them, too.
But people are cutting down too many trees.
That will bring about great changes in the weather.
It will be too cold or too wet in some places.
It will
be too hot or too dry in other places.
We must plant more trees.
They will make the
people healthy, and make our country more beautiful.
What are they made of 它们是由什么做成的？
20年的大树
3000张纸
全班 （50人） 全校
（1800人）
一天
一周
350张
1800张
50张
12600张
一周下来全校浪费了12600张纸，也就是说有
将近 棵生长了20年的大树从我们手中倒下了。
4
Take actions!
Protect the trees! Plant more trees!
Homework
1. Share your ideas about trees with your friends after class.
2. Share this passage with your parents.
Thank you!
Goodbye!
