青州实验中学李燕.ppt

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1、UNIT 4 Astronomy:The Science of the StarsUNIT 4 Astronomy:The Science of the StarsLook up your dictionary to find out the answers.exist-n._energetic-n._patient-n._cruel-n._relax-adj._shocked-v._harmful-v.&n._existenceenergypatiencecrueltyrelaxedshockharmdisappoint-n._ adj._/_publish-adj._presence-ad

2、j._disappear-n._violence-adj._exhaust-adj._/_frighten-adj._/_appear-n._explode-n._arrival-v._disappointmentdisappointeddisappointingpublishingpresentdisappearanceviolentexhaustedexhaustingfrightenedfrighteningappearanceexplosionarrive Fill in the blanks with“astronomy,biochemistry,geophysics,medicin

3、e”_:the scientific study of treatment of diseases and injuries._:the study of the chemistry of living things._:the scientific study of the earths atmosphere,oceans and climate._:the scientific study of objects in space,such as plantes,ets and“black holes”medicinebiochemistrygeophysicsastronomyUNIT 4

4、 Astronomy:The Science of the StarsHow Life began on the earth1.Read the text quickly and find outQuestion:1.How many parts can the text be divided into?2.What is the topic sentence or the main idea for each paragraph?Part 1:Part 2:Three parts(Paragraph 1)It tells about how water came into being on

5、the earth and its importance to the development of life.Paragraph2-3It tells about the evolution process of plants and animals Part 3:2.Detailed reading to find the information Read the text carefully and finish the exercises 1&2 on Page26&27 Paragraph 4Human spread all over the earth but they are n

6、ot taking good care of it.3.Discussion:(1).Do you think there are aliens on other plants?Why?(2).Do you think humans will disappear on the earth someday?Why?(3).Why is it wrong in films and stories to show dinosaurs and people together?(4).Why do you think that humans are the cleverest animals on th

7、e earth?vLong sentences:Paragraph 1:1.What it was to become was a mystery until the dust began to slowly combine into a ball moving around the sun.2.The problem was that the earth became violent because it was not a clear whether the solid shape was to last or not.3.It explodes loudly with fire and

8、rock,which were in time to produce,which were to make the earths atmosphere.4.This is how the earth began to show its special qualities.5.It allowed the earth to dissolve harmful gases,which had become part of the earths atmosphere,into the oceans and seas.Paragraph 2:1.What scientists think is that

9、 the earth was different because of the arrival of small plants growing.Paragraph 3:1.Scientists believe that taking carbon dioxide from the atmosphere and filling the air with oxygen helped life to develop.Paragraph4:1.They are putting too much carbon dioxide into the atmosphere,which prevents heat from escaping from2.Whether life will continue on the earth for millions of yeas to come will depend on whether this problem can be solved.