Unit 2 Lesson 2 Our beautiful planet（课件）-2023-2024学年剑桥power up英语第四册

Our beautiful planet Lesson 2 Play a game！ Read the words very loudly according to the numbers you see. 2 1 3 4 1 2 3 2 5 在地球出现在哪个单词就在哪大声读出单词，旁边的数字表示需要读几遍 Free talk. When did you last go on a trip to the countryside? Free talk. Where did you go? Free talk. Who went with you? Free talk. How long did it take to get there? Free talk. Where did you stay? Free talk. What did you see? Pre-listening Look and say. Who can you see? Look and say. What do you think the children are telling their parents about? While-listening Read and say. What are they talking about? Read and say. When did they left? Read and say. Where did they go? Read and say. How long did it take to the beach? Read and say. What happened to Jim? Read and say. What did they do to help Jim? Read and say. Who found out a post office in town? Read and say. What did Su-Lin do? Read and say. Did Su-Lin send them very quickly? Read and say. What happened to Jenny then? Read and say. Who was outside, too? Read and say. What happened then after Jenny ran into Pablo? Read and judge. 1.They broke something. 2.Miguel didn’t repair the tent. 3.Dad was not surprised. 4.The next day was great for them. 5.They saw lots of animals. ( ) ( ) ( ) ( ) ( ) × × √ √ √ Read and say. Who repaired the tent? “地球里”的小秘密 植树节那天，我在院子里种树 我们了解地球吗 发现了泥土里面的一只蚯蚓，它的劳动杰作让我觉得土地真是一个充满神奇和生命力的地方，那么我们的脚下到底是一个什么样的土地？土地下面又是什么呢？今天让我们通过4个小问题，一起来看看地球的小秘密。 我们了解地球吗 先考考你们，我们住在地球上，每天在地面上行走，地球是旋转的还是静止的? 问题1 答案：地球每时每刻都在旋转 地球不仅绕着太阳公转，还同时进行着自转。什么是自转呢？想象一下，有一根穿过地球中心的长棍子，这根想象中的棍子叫做地球的轴。它的一头叫做北极，另一头叫做南极。地球绕着它的轴旋转，就像车轮绕着轮轴旋转那样。 正是因为有了地球的自转，我们才有了白天和黑夜 做实验：让我们一起来模仿白天和黑夜 中国、美国刚好在地球的两边，让我们先来找到它们，中国是白天的时候，美国刚好是黑夜。 既然美国在中国的对面，那么我们能从中国挖个洞通往对面吗? 问题2 想要知道这个问题的答案，我们先要来看看地球里面长什么样 地球由内到外，一共有4层组成，哪四层呢？ 第一层：内核层，非常坚硬 第二层：外核层 外核非常热，岩石都熔化成了热巧克力一样的液体，可以像水一样流动 第三层：地幔层 地幔层都是岩石，但是它和我们平时看到的岩石不一样，非常得烫，越到深处越烫，底部热得熔化成液体，而越到表面温度逐渐降低。大家一定听说过火山爆发吧，那些熔化的岩石在热气的作用下，会喷出地面，威力非常巨大，我们一起来看一下。