Words study

Unit4. Global warming

• The animals’ habitats are destroyed.• That means animals will die out one day.

Have you ever seen a green house? What is a greenhouse made of and used for?

A greenhouse is made of ______ and is used for ______________, especially during _____weather.

growing plantsglass

cold

How does a greenhouse work?• The glass traps the heat from the sun and

keeps it from escaping. So the air inside is warm. This makes the greenhouse heat up and so the plants can grow throughout the cold period.

• Our earth is in a greenhouse.

THE EARTH IS BECOMING WARMER – BUT DOES IT MATTER?

• What are the “greenhouse gases”?Carbon dioxide, methane and water vapour.• Who talked about “greenhouse effect”?Dr. Janice Foster.• What is greenhouse effect?

Green house is a phenomenon when some gases in the atomosphere trap_________

and therefore warm the ______.

Heat from the sun

earth

Questions• Can we live without greenhouse effect?• Who wrote the article?• What’s the name of the magazine?• What are the names of the three scientists

mentioned in the article?• What did Charles Keeling find? And do you

agree with her?• Does George Hambley agree with Dr Janic

e Foster?• What does Hambley say about carbon diox

ide?

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Part3Part3 C. Introduction of global warming

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A. How global warming comes about

B. List two different attitudes towards global warming

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D. Whether people should do something about global warming

What can we do about global warming?

Group work

• Saving energy means reducing carbon dioxide, which is our duty.

• What should we do to slow down global warming?

Make a poster( 海报） for our school that tells students various ways they can reduce the amount of carbon dioxide in the air.

situations:In the classroom

At home

Dinning

Transportation/traveling

……

Requirements:1 a large heading(标题）2 imperative sentence

3 a slogan(口号，标语）at the end

An example

• Big heading → xxxxxxx• What we should do → Ⅰ Ⅱ ……• Slogan → Remember——your contributions counts!

Homework

• Composition:• 以“ how to slow down global warming?”为题写一篇发言稿。下面是你的发言要点：• 房间无人时记得要随手关灯，电脑和拔掉电源。• 随手关紧水龙头，洗米水或洗脸水都能够利用到。• 购物不用塑料袋，自带篮子或是环保购物袋。• 注意：短文必须包括所有要点，可以适当发挥，词数 120字左右。