Unit 5 Humans and nature Viewing Workshop 课件 -2023-2024学年高中英语北师大版（2019）必修第二册

Viewing Workshop UNIT 5 HUMANS AND NATURE By the end of this period, students will be able to: read and talk about the universe; watch for understanding; summarise information. CONTENTS Pre-viewing I While-viewing II Post-viewing III 3 Pre-viewing 1. How many stars are there in the galaxy? 2. How many stars are there in the universe? observable billion expand multiply equivalent incomprehensible bewildering edge stupendously horizon adj. 可观察到的 num. 十亿 v.扩大 v. 乘 adj. 等同的 adj.不可思议的 adj. 令人困惑的 n. 边，边缘 adv. 巨大地；惊人地 n.地平线 ；视野 Learn some new words. While-viewing Activity 1: What do you know about the universe? 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. Activity 2: Watch the first part of the video. Check your predictions from Activity 1. 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. Activity 2: Watch the first part of the video. Check your predictions from Activity 1. Check your answers one by one. 1. The universe is about ________________ years old. 13.8 billion 2. The observable universe is about _____________ light years across in diameter. 27.5 billion 93 46 billion 3.Today the distant objects like stars that we can observe are a bit more than ______________ light years away. 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? Activity 3: Watch the rest part of the video. Complete the table. 1. How big is it? Observable Universe Whole Universe