北师大版高中英语必修第二册 Unit 5 Humans and nature Viewing workshop PPT课件

这是一份北师大版高中英语必修第二册 Unit 5 Humans and nature Viewing workshop PPT课件，共33页。

5INUTHumans and NatureA SEA STORY①Lesson 1Lead inPart ONELead inDo you know the word —“universe”?“Universe”—a world or an area of space that is different from the one we are inLead inLet’s imagine how big is the “universe”.Lead in................Lead inLet’s watch the video and find the right answer.Then complete the following quiz.A. 13.8 billion B. 27.5 billion C. 46 billion D. 93 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.Lead inLead inHave a try!A. 13.8 billion B. 27.5 billion C. 46 billion D. 93 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.ADCLead inView and learn Part tWOView and learnLet’s fill in the blanks according to the rest of the video.View and learnNow it is your turn to fill in the blanks.About 93 billion light years across in diameter. Infinite. Yes. No. Yes. Earth/You No. Yes. Yes. View and learnWatch the video again and then discuss the following questions.1 What is the Earth compared to? Is the comparison useful in understanding the infiniteness of the universe?2 What methods does the presenter use to enable viewers to understand this piece of knowledge in physics?View and learnView and learnDiscuss the questions with your partners.View and learnUseful expressionsPart threeUseful expressionsMore specifically, the observable universe is the region of space visible to us from Earth.specifically adv. 明确地more specifically 更具体地说observable = observe + able 能看得到的 region n. 区域; (通常界限不明的)地区; 地方; 行政区..., then regardless of what direction we look, we see light that has been travelling at most 13.8 billion years...regardless of 不管、不顾，后面常接名词或从句，一般用于客观上无法避免的事实，往往是不利的条件，需要主语去正面对待。We will continue the race, regardless of the weather.I tell the truth, regardless of what they want to hear.Useful expressions...so it is logical to think of the observable universe must then be two times 13.77 equals 27.5 billion light years across.think of 考虑equal adj. 相同的，同样的 on equal terms 平等相处 equal in的意思是“在…方面相等或平等”; equal to 和equal with则表示“等于”;equal to强调“相等”, equal with强调“平等”Useful expressions..., the size of the Earth within the observable universe is roughly equivalent to the size of a virus within the solar system.the size of ...的尺寸equivalent adj. 相等的；相同的equivalent weight 当量 equivalent force 等效力solar system 太阳系Useful expressions... because we cannot really appreciate the incomprehensible smallness of a virus nor the bewildering bigness of our solar system either.appreciate doing 感谢做...incomprehensible = in + comprehensible 无法理解的 bewildering adj. 令人困惑的 = confusing Useful expressionsSo let’s just say that the observable universe is stupendously big.stupendously adv. 巨大地discover stupendously 了不起地发现waste stupendously 惊人地浪费increase stupendously 惊人地增长Useful expressionsBut the whole universe, as far as we can tell, is a lot bigger.as far as 只要；直到... 为止Useful expressionsSpace is most likely infinite, or at least it doesn’t have an edge.infinite adj. 极大的；无法衡量的at least 至少at most 至多Useful expressionsThe whole universe is probably infinite.probably adv. 可能；大概probably 用法：主要修饰谓语动词,在句子里如果有一个助动词和一个主要动词, probably应紧跟在助动词之后; 如果有两个以上助动词, probably放在第一个助动词之后。That hotel probably costs no less than 20 dollars a night.Useful expressions... and the whole universe has a temporal edge or what we call a beginning, but almost certainly not a spatial one.temporal adj. 颞的temporal edge 颞缘spatial adj. 空间的Useful expressionsWe are at the center of the observable universe because the observable univers is just a region of space visible from Earth.at the center of 在……的中心Useful expressionsIn fact, if you want to be more precise, each one of us is the center of our own observable universe,...in face事实上= actuallyeach one of us 我们中的每个人，作主语时，谓语动词用单数。Useful expressionsYes, space is expanding, which makes both the observable universe and the whole universe bigger.非限制性定语从句空间在膨胀，这使得可观测的宇宙和整个宇宙都变大了。Useful expressionsPart fourHomeworkHomeworkRecite the key expressions and sentences.Let’s find more information online and share with the class.