Lesson1GlobalWarming.doc

Unit22Lesson1Global Warming 学案While ReadingTask1: Understand the title:Can we take the heat?Task2:Skim the text and match the headings with the according paragraphs.A. CausesB. SolutionsC. DefinitionD. ResultsE. Introduction paragraph1Paragraph2Paragraph3Paragraph4Paragraph5Task3:ScanningScan the text for these following words and work out their meanings.1. In the last few decades, scientists have reached consensus and reported that human beings are causing changes in the earths climate.2. Without these naturally occurring gases, the suns rays would bounce back into space leaving the Earth cold and impossible to live on.3. Given this data, it seems that the link between human activities and rising global temperatures is not merely a coincidence.4. if we continue to produce carbon dioxide and other gases in such huge quantities, we are condemning life on Earth.5. Some government, for example, the USAs federal government, express reservations about whether global warming is really caused by human activities.6.Experts advocated that each person play their part to save the earth.Task4: Careful readingI. Read the text carefully and answer the questions .1) What is global warming?2) Are greenhouse gases necessary for life on Earth? 3) By how much has the global average temperature increased in the last 100 years?4)What human activities are causing global warming?5)What are the results of global warming?6) How can we help solve the problem of global warming?Task5: As a student,what do you think you can do to help reduce greenhouse gases in our daily life?Task6: Readthetextagainandfillintheblanks.ItisreportedthatEarthsclimateisbeingchangedandhumanwillfaceglobal1._inthe21stcentury.Whatisglobalwarming ?ItreferstoanaverageincreaseintheEarths 2. _that,inturn,leadstoclimatechange. Whyisglobalwarmingseenasadangerandhowisit 3._toourlives.Theglobalaveragetemperaturehas 4. _by1 overthelast100yearsbecauseofhumanactivities.Ifthesituationcontinues,weare 5._lifeonEarthandshouldfaceterribleclimatechanges,seriousdiseasesandbad 6. _onsomeindustriesaswellastherisingsealevels.Howcanwestopthese7._fromhappening8. _allovertheworldhavearesponsibilityto 9._the