unit 9 saving the earth 教学目标 : Ⅰ. 观看图片演示,...

Unit 9Unit 9 Saving the earthSaving the earth

教学目标 : Ⅰ. 观看图片演示 , 分析讨论并讲述人类面临的水污染 , 垃圾污染 , 空气污染 , 乱砍滥伐 , 土地沙化等环境问题 , 讨论内容包括以下问题 :

①What kind of environment problem is it?

②How does it form?

③How deal with it?

Ⅱ. 教育学生认识到环境问题从身边、学校、家庭的小事做起 ,

从自身做起 , 讨论并回答以下问题 :

① What kind of pollution are there in Our school?

②What should you do?

Ⅲ. 掌握 : do sb. harm=do harm to sb.

拓展 : do sb. good=do good to sb. ① do sb. wrong=do sb. to wrong

do sb. a favour=do a favour for sb.

② be harmful to

Water pollution

Waste from factories and cities should be stopped from throwing into the water.

Picture 1

factories water pollution from families lead to farms

people become sick using new fish die stop technologies plants die recycling

making clean

Picture 2

Products wrappingTrash/Garbage from factories lead to

Families

①using baskets to buyWater pollution products

Air pollution stop ②don’t throw rubbish Make people sick or nature

Spread diseases ③recycle

Air pollution

Air pollution

picture 3

Traffic: buses, cars…

Air pollution from factories ， smoke, chemicals. Lead to

Rubbish

Acid rain

Making people sick using less energy

Animals/plants killing stop plant new trees and grass

or make them die out using less wood

bringing nature disasters prevent factories bringing pollut

ion

deforestation

Picture4:

Cutting down trees

Deforestation from met plant new trees lead to

Use too much wood

Climate becomes worse and worse don’t cut too many trees

Soil washed away by blood stop plant new trees

or brown away by strong wind don’t use too many wood

desert appears

Sandstorm

desertification

too many sheep and cattle

all the grass be eaten up

grass never grow again ; the land become desert

nothing to hold…

soil be blown away

soil be washed into…

Picture 5 ：

Desertification lead to Deforestation

Soil washed or blown away lead to desert /sandstorm

Help

Help me ,help you, help everyone.Return GREEN to the earth!

As a result,more people will die of hunger.

Picture 6 ： We can draw a conclusion

Water pollution no clean water Trash/Garbage no fresh air Air pollution lead to no soil Deforestation more plants and animals Desertification die out No living place Lead to starvation （ even death ）

We have onlWe have only one earthy one earth

!!! !!!

Summary

We can see from the pictures our earth facing

different kinds of harms. if we don’t protect our

environment and continue to destroy it, we will

destroy ourselves. As middle school students ,

we must realize that protecting our environment

is everyone’s duty .so we must study hard and

improve our quality to make our and better. That

is , we can make our life better and better.

Discuss and answer the following questions

①What kinds of pollution are there in our school?

(plastic bags , plastic bottles , wrapping packages; wa

ste paper and so on)

②What should we do?

(put them into the rubbish bins/put together to sell

them /Don’t throw them in the school yard or in the

classroom /we should be strict with ourselves )

Main points

① do sb. Harm/ good/ wrong/ a favour= do harm /

good/ wrong/to sb

do a favour for sb.

② be harmful to

Homework

Write a short passage about

how to protect our environment