仁爱科普版九年级上册Unit 2 Saving the earth.Topic 2 SectionA 课件(共15张PPT)

(共15张PPT)
Unit 2 Saving the Earth
Topic 2 All these problems are very serious.
Section A
Warming-up
If you like this picture
please stand up!
Say “The earth is our home， we should protect it !”
学习目标
1.学习新单词sand,although等、 短语change into, as a result, stop…from；
2.了解沙尘暴形成的原因，和一些用来表达树的作用的句型；
New words
sand
sandstorm
change...into
desert
human being
although
reduce
completely
[s nd]
['s nd'st rm]
[ dez t] n.
[d z : t ] v.
['bi ]
[ l' ]
[r 'dju s]
[k m'pli tl ]
Fill in the blanks
根据句意及提示，完成句子.
1) The wind is so strong! And the ______really hurt my face. (沙)
2) What causes these ____________ （沙尘暴）
3) As a result, a lot of rich land has changed into _______. （沙漠）
4) ___________ the question is difficult , he can still answer it .（虽然，尽管，即使）
5) Some animals are in danger of dying out ____________.（彻底地；完全地）
sand
sandstorms
desert
Although
completely
1.The boy and girls are talking about ______.
sandstorms B.weather C.pollution
2.People have _____many trees,so rich land has changed into desert.
A.cut down B. cut up C. cut off
3.Trees can stop the wind from ____the earth _____.
A.washing;away B.blowing;away C.putting;away
Listen to 1a and choose the best answer.
A
A
B
What are trees’ functions（作用）
Trees can stop the wind from blowing
the earth away.
A lot of water can be saved by forests.
Trees can also stop the water from
washing the earth away.
A.
B.
C.
Read 1a, answer the question.
cut down
as a result
change into
blow away
wash away
stop...from doing
Find and remember these phrases
砍倒
结果
变成
吹走
冲走
阻止...做...
Say a sentence about these phrases
cut down
as a result
change into
blow away
wash away
stop...from
Read 1a again then fill in the blanks.
Kangkang,Maria and Jane are talking about the bad________.Jane says people have_______ too many trees,so a lot of___________ has ______________desert.Trees are good for human beings.They can _____the wind from _______the earth away,and stop_______ from _______ the earth _____.Then a lot of water ____________by forests.______________ is harmful to human beings.
weather
cut down
rich land
changed into
stop
blowing
the water
washing
away
can be saved
Cutting down the trees
Practice makes perfect
1.The wind outside is blowing________. (strong)
2.Our school _____________ a lot in the past three years. (change)
3.Playing basketball_____ good for our health. (be)
4.Staying up is ________ to our health. (harm)
5.We should stop human beings from__________ the environment. (destroy)
strongly
has changed
is
harmful
destroying
Useful expressions
1.People have cut down too many trees.
2.As a result, a lot of rich land has changed into desert.
3.Trees can stop the wind from blowing
the earth away.
4.And a lot of water can be saved by forests.
5.They can also stop the water from washing
the earth away.
6.Although we have built “The Green Great Wall”,we still need to do something to protect the environment.
Summary 总结
Bye-bye!