Unit 5 Humans And Nature Viewing Workshop 课件-2023-2024学年高一英语北师大版（2019）必修第二册

北师大必修 第二册 Unit 5 Viewing Workshop How Big Is the Universe? 教学目 Lead-in How big is the universe? What do you know about it? planets … infiniteness vastness UNIVERSE star galaxy 1 2 To learn something about it by watching a video about the universe To talk about the universe 学习目标 目标一：To learn something about it by watching a video about the universe Activity 1: Complete the quiz with the right numbers. 13.8 billion 93 billion 46 billion 1. 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. 13.8 billion 93 billion 46 billion Activity 2: Watch Part 1 of the video. Check your predictions from Activity 1. Activity 3: Watch the rest of the video. Complete the table. Questions Observable Universe Whole Universe 1. How big is it? 2. Is there an edge? 3. Is there a centre? 4. Is it getting bigger? The observable universe is about 93 billion light years across in diameter. Infinite. Yes. Temporal edge. No. Yes. Earth/You. No. Yes. Yes. 目标二：To talk about the universe Activity 1: Watch the whole video again. Discuss the 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? Suggested Answers 1. 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. The presenter provides comparisons that are relative to our knowledge. Activity 2: What have you learnt about the size of the universe? Find more information online and share with the class. Retell something about the universe. 学习总结 Lavf56.40.101