科普仁爱英语九上Unit 2 Topic2 All these problems are very serious Section A课件27张

课件27张PPT。All these problems are very serious.Section AUnit2 Topic2Watch a short movie and guess.What kind of weather is it?
Sandstormrainstormsnowstorma kind of storm
caused by sandDescribe the sandstorms3 Do you know how sandstorms come into being? Number
the pictures and talk about the sandstorm in groups.( )( )( )( )( )( )415362wash the earth awaymany treeschange into desertforests gonesandstorms come
into beingcut down treesmany trees cut downforests gonewash the earth away冲走change into desertsandstormcome into being Compare the two pictures.The rich land has changed into desert.change into, change …intoRetell CompetitionList the trees’ functionslet out oxygen,
lungs of the earth,
control the climate ,
provide homes for animals,
give us fruit, medicine, wood, rubber etc.
One Jungle, Many Worlds.Skim 1a and find more about Trees’ functions.Trees can stop the wind from blowing the earth away.
A lot of water can be saved by forests.
They can also stop the water from washing the earth away. Listen to 1a, and answer the questions.The Green Great Wall.1. What are the boy and girls talking about? 2. What have we done to protect the environment?The reasons for sandstorms. Read aloud and pick up the useful expressions.Useful Expressionschange into
stop … from
blow… away
wash … away
human being
as a result
Useful Expressions
7. blow strongly
8. What bad weather!
9. affect the weather
10. The Green Great Wall
1.I have ____ to tell you.
A. important something
B. something importantB形容词修饰不定代词和不定副词时，要放在不定代词/不定副词之后Do you know?2.Everybody ___ ready for the match.
A. is B. areA不定代词作主语时，谓语动词要用单数。2 Complete the sentences with the correct forms of the given phrases in the box.
as a result, change into, do something,
stop…from, blow…away 1.People have cut down such a large number of trees that
the land _____________________desert.
2.There are fewer trees left, so the wind always _______
the earth ________.
3.Air pollution has become a serious problem, so we must
______________ to reduce it.
4.we should try our best to _________ people ________
cutting down the trees.
5.In the future, human beings can protect the trees well.
_____________, animals will live a happy life in the forest. has changed intoblows awaydo somethingstopfromAs a resultK: wind; sand; anything
M: sandstorms
J: cut down; as a result; change into
M: affect
J: stop…from…; blow… away
K: can be saved
J: wash … away
K: is harmful to; although; do something Act out the dialog in pairs 沙尘暴是怎么形成的？
How do sandstorms ___________________?
2. 他忘了浇花，结果花都死了。
He __________ water the flowers. __________, they all died.
3.虽然沙滩上的太阳很大，但孩子们仍开心地在玩着沙子。
___________ the sun is shining strongly on the beach, the children are still playing with the ________ happily.
链接中考Summary
1.change into desert 2. human being 3.as a result
4. come into being 5.stop … from 6.blow… away
7.wash … away 8.destroy the environment
(1)Trees can stop the wind from blowing the earth away.
(2)They can stop the water from washing the earth away.
(3)As a result, a lot of rich land has changed into desert.
(4)While I was walking down the street just now,
I couldn’t see anything.
(5)Although we have built “The Green Great Wall”, we still need to do something to protect the environment.
AssignmentRead 1a.
Memorize the useful expressions and key sentences which we learn today.
Finish Section A in your workbook.
Preview Section B.Thank you! Trees are very useful to us. They can help us p_____ the wind from blowing the earth away and stop the s_______ from moving towards the rich land. Trees also s________ water from running away. They can keep a great d______ of water. So we must stop people from c______ down too
many trees. Otherwise a lot of rich land will
change into d_______, l_______ only sand. We must get rid of (摆脱) this kind of bad b______.根据句意及首字母提示完成句子。 revent and ave ealutting esert eaving ehavior4 A. Listen to the passage and circle the phrases you hear. become weaker

destroy the environment
disappear rapidly

on the earth
enough bamboo to eat4 B. Listen again and fill in the blanks.1. Now some kinds of animals are becoming
______ ______ _______.
2. Some animals are_____ ______ ____dying out
completely.
3. In the past, pandas lived a quiet life and had
________ ______food.
4. Humans have _____ _____ __________ the importance of protecting animals.
5. We should ______ ______ ____to protect them.do our bestin danger ofplenty ofcome to understandfewer and fewer