《Huamns and nature》View Workshop PPTActivity 1What do you know about the universe?What do you want to know about the universe?Quiz13.8 billion 27.5 billion 46 billion1. The universe is about __________ years old.2. The observable universe is about _________ light years across in diameter.3. Today the distant objects like stars that we can observe are a bit more than ____________ light years away.Activity 2Watch the first part of the video. Check you predictions.Activity 3Watch the rest of the video. Complete the table.Activity 4Watch again and discuss.1) What is the Earth compared to? Is the comparison useful in understanding the infiniteness of the universe?The size of the Earth within the observable universe is roughly equivalent to the size of a virus within the solar system. That does not help much, because we cannot really appreciate the incomprehensible smallness of a virus nor the bewildering bigness of our solar system either.2) What methods does the presenter use to enable viewers to understand this piece of knowledge in physics?The presenter provides comparisons that are relative to our knowledge.Activity 5Find more and share.What have you learnt about the size of the universe?Find more information online and share with the class.关键词：北师大版高中英语必修二PPT课件免费下载，Huamns and nature PPT下载，.PPT格式； 本作品中主体文字及图片可替换修改，文字修改可直接点击文本框进行编辑，图片更改可选中图片后单击鼠标右键选择更换图片，也可根据自身需求增加和删除作品中的内容，源文件无水印。如认为该内容涉嫌侵权，可通过邮件提出书面通知，我们将及时处理。