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选修8《Lesson 1 Global Warming》新课标PPT课件优质课下载
Windmills风车
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
Reading
The earth becoming warmer——but does it matter ?
Teaching goals
Enable the students to talk about different sources of energy.
Enable the students to read the text, understand what it is about and talk about the causes and effects of global warming.
Teaching important & difficult points
Enable the students to get a better understanding of articles of this kind.
Using scanning or skimming methods to catch the key information
By discussion to express ideas to slow down the process of global warming.
What is the greenhouse?
How does it work?
What are the “greenhouse gases”?
What is the greenhouse?
A greenhouse is made of glass and is used for growing plants, especially during cold weather.
How does it work?
The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the
cold period.
In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane (甲烷, 沼气) and water vapor.