Unit 4 Global warming warming up
文档属性
| 名称 | Unit 4 Global warming warming up |
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| 格式 | rar | ||
| 文件大小 | 1.1MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（新课程标准） | ||
| 科目 | 英语 | ||
| 更新时间 | 2010-12-20 00:00:00 | ||
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文档简介
课件14张PPT。Unit4 Module6Global WarmingRevisionWhat are the Energy resources and are they renewable or non-renewable?Windmills, renewable.A coal power station , non-renewable.An oil refinery(精炼厂), non-renewable.A nuclear power plant, non-renewable. Solar panels, renewable.A hydro-electric dam, renewable.Non-renewable RenewableCoal
Oil
Natural gas
Uranium
Wind (wind power)
Sun (solar energy)
Water (hydro-electric power)
Plant waste (biomass energy)
Hot springs or geysers (geothermal energy)
The sea (tidal energy)Fossil fuelsWhat are fossil fuels?Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed. What is the greenhouse made and used for?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.What are the “greenhouse gases”?
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.What do you think greenhouse
gases do?
They trap heat from the sun and therefore warm the earth.
Oil
Natural gas
Uranium
Wind (wind power)
Sun (solar energy)
Water (hydro-electric power)
Plant waste (biomass energy)
Hot springs or geysers (geothermal energy)
The sea (tidal energy)Fossil fuelsWhat are fossil fuels?Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed. What is the greenhouse made and used for?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.What are the “greenhouse gases”?
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.What do you think greenhouse
gases do?
They trap heat from the sun and therefore warm the earth.