Check your writing homework CHINESE RED CROSS PROGRAMME: A SUCCESS A programme to help people with AIDS and to teach people about the disease has been running for six years in Yunnan and several other provinces. The Red Cross trains young people to teach others about HIV/AIDS and how to protect themselves from the disease. The programme is very successful because the teachers are the same age as the students. The Red Cross wants to make sure that everyone has information about this deadly disease. This is because the disease is

spreading quickly and all young people are in danger if they have unprotected sex. The government says that it must act quickly To inform everyone of the danger. If they don’t do this, as many as 10 million people in China could have the disease by the year 2010.

What’s happening?

What happened in South of China in the winter of 2008? What’s the reason?

Unit 4 Global warming

Energy sources 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.

things that use energy in a house

light things that use energy in your home micro-wave oven cassette player heating television hairdryer video player fridge computer washing machine stove

Wind energy is used as power to produce electricity. Windmills

where electricity is produced by burning coals. The coal power stations

in which oil is refined and made pure. The Oil Refineries

a facility designed to convert nuclear energy into electricity. A nuclear power plant

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. Solar panels

are used to keep back water and raise its level for irrigation or for producing electricity, etc. The Hydro- electric dams

Guess it! 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.

What source of energy? Geysers ( 间歇泉 )

Geothermal ( 地热的 ) Energy Plant

An energy source is “renewable” when supplies of it never run out and “non- renewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable? Discussion

Sources of energyRenewable/non-renewable coal oil natural gas wind (wind power) sun (solar energy) uranium (nuclear energy) water (hydro-electric power) plant waste (biomass energy) hot spring or geysers (geothermal energy) the sea (tidal energy) non-renewable renewable non-renewable renewable

What are these buildings made of and what is their purpose? They are made of glass and plants can grow in it when it is cold outside.

 Have you ever seen a greenhouse?

 How does it work? The glass traps the heat from the sun, making the air warm so that plants can grow better.

The air inside was warm because the glass traps( 挡住，吸收 ) the heat from the sun and keeps it from escaping （逃跑）. This makes the greenhouse heat up （热 量上升） and so the plants can grow throughout( 在 … 期间 ) the cold period.

 What are the “greenhouse gases”?  What do you think greenhouse gases do?

greenhouse effect

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 effect.

The Earth Is Becoming Warmer – But Does It Matter?

It has a title, a first paragraph that runs across the page and is in bold, the main text in two columns, graphs/diagrams, two quotes. Skim the text and find out what the structure of a magazine like this is and how the text is organized?

Read the text quickly and answer the questions: 1.Who wrote the magazine article? What is the name of the magazine? 2.What are the names of the three scientists mentioned in the article? 3.What do they think about global warming? Do they agree with one another? 4.What are the two graphs about? 5.What is the main topic of the article?

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? They are Dr. Janice Foster, Charles Keeling and George Hambley. 1.Who wrote the magazine article? What is the name of the magazine?

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, while some others believe that we should not worry about it.

4.What are the two graphs about? Graph 1 shows the temperature increase of one degree Fahrenheit between 1860 to Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to Graph 1: Graph 2:

5.What is the main topic of the article? Global warming / The warming of the earth.

Construct Main ideas of each part Part1(1) Introduce a debate over the issue of global warming.

Part2(2-5) How global warming comes about. Part3(6) List two different attitudes among scientists towards global warming. Part4(7) It's up to readers to think and decide whether people should do something about global warming or not.

1.Review the text carefully and finish the comprehending 2-3 on page Find out the important and difficult words and expressions to you and finish exercises on page 28.