英语必修 第二册Unit 5 Humans and nature本单元综合与测试教学演示课件ppt

这是一份英语必修 第二册Unit 5 Humans and nature本单元综合与测试教学演示课件ppt，文件包含课件Unit5HumansandNatureViewWorkshoppptx、学案Unit5HumansandNatureViewingWorkshopdocx、教案Unit5HumansandNatureViewingWorkshopdocx等3份课件配套教学资源，其中PPT共12页， 欢迎下载使用。

Unit 5 Humans and Nature View Wrkshp
What d yu knw abut the universe?
infiniteness
What d yu want t knw abut the universe?
13.8 billin27.5 billin46 billin
1. The universe is abut __________ years ld.2. The bservable universe is abut _________ light years acrss in diameter.3. Tday the distant bjects like stars that we can bserve are a bit mre than ____________ light years away.
Watch the first part f the vide. Check yu predictins.
13.8 billin
Watch the rest f the vide. Cmplete the table.
The bservable universe is abut 93 billin light years acrss in diameter.
Yes. Tempral edge.
Yes. Earth/Yu.
Watch again and discuss.
1) What is the Earth cmpared t? Is the cmparisn useful in understanding the infiniteness f the universe?2) What methds des the presenter use t enable viewers t understand this piece f knwledge in physics?
The size f the Earth within the bservable universe is rughly equivalent t the size f a virus within the slar system. That des nt help much, because we cannt really appreciate the incmprehensible smallness f a virus nr the bewildering bigness f ur slar system either.
The presenter prvides cmparisns that are relative t ur knwledge.
Find mre and share.
What have yu learnt abut the size f the universe?Find mre infrmatin nline and share with the class.