Unit 2 Saving the earth.Topic 2 All these problems are very serious Section D 课件14张PPT

课件14张PPT。Unit 2 Saving the Earth Topic 2 All these problems are very serious. Section D 仁爱版英语 九年级上 What can you learn form the short movie?
Water is important.
Because humans, animals and plants can’t live without water.Movie
Nearly three fourths of the earth is covered with water.water on the earth3/4被……覆盖/'n??l? /
几乎、将近 While there is so much water around the world,
we humans are still short of drinking water.
So do animals and plants.
Do you know why?be short of 缺乏……1. Why is our earth thirsty when ? of the earth is covered with water?
Because about 97% of the water on the earth is sea water and we can’t use it for watering plants or drinking directly.
2. What kind of water can humans drink and use?
Humans can only drink and use fresh water from places including rivers, lakes and underground.
( )Although the world is hungry, it is even thirstier. While nearly ? of the earth is covered with water, we are still short of drinking water. This is because about 97% of the water on the earth is sea water. So we can’t use it for watering plants or drinking directly. Humans can only drink and use fresh water from places including rivers, lakes and underground. 1Read and answer.
How can we avoid a serious water shortage?
First, we should save water and not waste it.
Second, we should protect our water resources and not pollute them.
Third, we should discover ways to reuse water.( ) How can we avoid a serious water shortage? First, we should save water and not waste it. Second, we should protect our water resources and not pollute them. Third, we should discover ways to reuse water. Scientists have made some progress in this field. Today, some large cities are reusing their water. But people’s need for water is increasing day by day. We still don’t have enough water. What else can we do?
2Read Paragraph2 and mark T or F.
( ) Scientists haven’t made any progress in this field.
( ) Water is reused nowhere.
( ) People’s need for water is increasing day by day.FFTListen to Paragraph3 and fill in the blanks( ) The sea______ ____ have the best answer. There is ______ ___water in the sea. But we need to ____the salt _____from the sea water . This is very expensive. If scientists can find cheaper ways to do it, we can ______ ___ _________of the shortage of water. 3seems toplenty oftakeawaysolve the problemQ: How can we change sea water into fresh water?
We need to take the salt away from the sea water.be short of
on the earth
use sth for sth/doing sth
avoid sth
make (some) progress
in the field
day by day
seem to do sth
plenty of
take away
the shortage of
1. 缺乏……
2. 在地球上
3. 用某物做某事
4. 避免某事
5. 取得（一些）进步
6. 在这个领域
7. 一天天
8. 似乎/好像做某事
9. 大量的
10. 带走、拿走
11. ……的缺乏
Key phrases领域; 场地, 田地1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11. one by one
year by year
step by step
一个接一个
一年年
一步步
Exercises If we want to use the sea water, we must ______ ___(拿走） the salt from the sea water.
How can we _________(避免) a serious water shortage?
We should __________(找到) ways to reuse water.
People’s need for water is increasing ____________(一天天).
Although the world is hungry, it is even ______(更渴的)
While ___________(几乎，差不多)? of the earth is covered with water, we are still short of drinking water. take awayavoiddiscoverday by daythirstier nearlyWater pollutionless fresh waterWe should protect and save water.How to protect and save water?Example:
Pass laws( n.法律) against water pollution.
Collect and reuse waste water.
——————————————
——————————————
5. ————————————————————
6. ——————————————————
________________________________________
…Turn off the taps in timeTake a shower instead of a bathstop…from…, pour…into…, turn off, tap(水龙头), wash clothes/vegetables, clean the floor, throw…into…Stop the factories from pouring waste water into rivers.Don’t throw litter into the waterAfter we wash clothes or vegetables, we can reuse
the water to clean the floor.To save water is to save life. Don't let the last drop of water become our tears We learn: 1. some words: avoid, discover, thirsty,
nearly, law
2. some phrases: day by day, be short of
3. some sentences:
(1)But people’s need for water is
increasing day by day.
(2)While nearly ? of the earth is covered
with water, we are still short of drinking
water.
We can: 1.Talk about ways of saving water.
2.Summarize and use the indefinite
pronoun and adverb correctly.
3. Write a proposal.Summary3. Write a proposal(?提议) about saving water to all the students in your school. My dear friends,
Water is very important to human beings. Let’s do something to protect and save it.
First, ____________________ .
Second,_______________________________.
Third, _______________________________.
Let’s try our best to save water and our planet.

_________ _____________HomeworkThank you !