Unit4Globawarming_课件（人教版选修6）.ppt

Welcome;Unit 4;;;things that use energy in our life;things that use energy in our life;Do you know how energy is produced? How many sources of energy can you list?;Wind energy is used as power to produce electricity.;Electricity is produced by burning coals.;Oil is refined and made pure. ;Nuclear energy is converted into electricity.;pieces of equipment on a roof that collects energy from sunlight in order to heat water and produce electricity ;Water are kept back and raised its level for irrigation or for producing electricity.;geothermal (地热的) energy plant;;wind energy ;solar energy ;hydroelectric power ;geothermal energy;tidal energy ;biomass energy;nuclear power plant ;an oil refinery(精炼厂) ;coal power station ;natural gas ;uranium Ore (铀矿石) ;What is the building made of and what is it used for? ;Have you ever seen a greenhouse?;How does it work?;What are the “greenhouse gases”? What do you think greenhouse gases do?;What’s greenhouse effect?;greenhouse effect;Global warming / The warming of the earth.;Careful Reading;Read the text and answer the questions:;Sophie Armstrong wrote the magazine article. The name of the magazine is “Earth care”.;3. What do they think about global warming? Do they agree with one another?;4. What are the two graphs about?;Choose the best answers.;2. The author probably agrees that ______. A. actually global warming is good for manB. we should do nothing about the global warmingC. catastrophes will happen if the globe keeps on warmingD. a lot remains to be found out about the effects of global warming.; The temperature last century didn’t increase much. 2. Everyone believes that global warming is caused by the activities of humans. 3. Janice Foster believes that she can measure the future global rise in temperature.;4. The rise in carbon dioxide is causing a steady increase in global warming. 5. George Hambley believes that global warming will do good