新课标选修6 unit 4 warming up and reading课件

effect.
The Earth Is Becoming Warmer – But Does It Matter?
Fast Reading
Glance at the article and answer these questions.
1.Who wrote the magazine article? What is the name of the magaz oil
natural gas wind (wind power) sun (solar energy) uranium (nuclear energy)
Renewable/non-renewable non-renewable non-renewable
in which oil is refined and made pure.
A nuclear power plant
a facility designed to change nuclear energy into electricity.
Solar panels
on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or heating your water.
Now, let’s enjoy a short video about global warming. It’s funny and grieved.
We depend on energy to do many things in our daily lives. For example, energy lights our cities and heats our buildings. Make a list of things that use energy in your home, in your school, or any other places you can think of.
Guess it!
What source of energy?
Geysers(间歇泉)
Geothermal (地热的) Energy Plant
Discuss
An energy source is “renewable” when supplies of it never run out and “nonrenewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable?
How does it work?
The glass traps the heat from the sun, making the air warm so that plants can grow better.
Greenhouse gases!
What’s greenhouse gases effect?
Greenhouse gases perform the same function as the glass in a greenhouse --- They trap the heat of the sun and keep the air surrounding the earth warm. It is called the greenhouse
3. The author probably agrees that ________ A. actually global warming is good for man. B. we should do nothing about the global warming. C. catastrophes will happen if the globe keeps on warming. D. a lot remains to be found out about the effects of global warming.
Detailed-Reading
Read the article in details and finish the following task.
listening
Listen to the reading passage and do some choices.
1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977? A. Dr. Janice Foster. B. Charles Keeling. C. George Hambley. D. Sophie Armstrong.
while some others believe that we
should not worry about it.
4.What are the two graphs about? Graph 1 shows Graph 1: the temperature increase of one degree Fahrenheit between 1860 to 2000. Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to Graph 2: 1997.
Sophie Armstrong wrote the magazine article. The name of the magazine is “Earth care”.
2.What are the names of the three scientists mentioned in the article?
Unit 4
Global warming
---warming up and reading
Is the whole world becoming warmer and warmer? Why?
population Species extinction Acid rain carbon dioxide Water pollution air pollution
…
全球气候变暖是一种“自然现象”。人们焚烧 化石矿物以生成能量或砍伐森林并将其焚烧时会产 生二氧化碳等多种温室气体。这些温室气体对来自 太阳辐射的可见光具有高度的透过性，而对地球反 射出来的长波辐射具有高度的吸收性，能强烈吸收 地面辐射中的红外线，导致全球气候变暖，也就是 常说的“温室效应”。全球变暖会使全球降水量重 新分配、冰川和冻土消融、海平面上升等，既危害 自然生态系统的平衡，更威胁人类的食物供应和居 住环境。
They are Dr. Janice Foster, Charles Keeling and George Hambley.
3.What do they think about global warming?
Do they agree with one another?
There are some very different attitudes among scientists towards this issue. Some think the effects will be terrible,
washing machine
Windmills
Wind energy is used as power to produce electricity .
The coal power stations
where electricity is produced by burning coals.
The Oil Refineries
non-renewable renewable renewable non-renewable renewable renewable
water (hydro-electric power) plant waste (biomass energy)
geothermal energy
the sea (tidal energy)
5.What is the main topic of the article?
Global warming / The warming of the earth.
Read the article carefully. Tell true or false.
1.The temperature last century didn’t increase much. T 2.Everyone believes that global warming is caused by the activities of humans. T 3.Janice Foster believes that global warming is caused by burning fossil fuels. F
renewable
renewable
Pre-reading
What is the greenhouse
made and used for?
greenhouse
They are made of glass and plants can grow in it when it is cold outside.
The Hydro-electric dams
are used to keep back water and raise its level for irrigation or for producing electricity, etc.
Uranium Ore (铀矿石) The element uranium does not occur in pure form in nature but is found in minerals such as carnotite（钒钾铀矿）, pictured here.