Unit 4 Reading plus 课件 2025-2026学年人教版英语八年级下册

该初中英语课件围绕“撒哈拉沙漠”主题，聚焦沙漠相关词汇、说明文阅读技巧（如略读、扫读、数字定位法等），通过“Watch and Say”视频导入和“Free Talk”激活学生已知，搭建从兴趣激发到文本探究的学习支架，引导学生逐步深入理解说明文特征与细节。 其亮点在于融合语言能力、思维品质和文化意识培养，如阅读任务用数字定位法、转折过渡词法提升语言理解与提取能力，“Think and Talk”环节引导分析沙漠扩张影响并提出解决方案培养思维，结合环保教育渗透文化意识。采用任务型教学与思维导图小结，学生提升阅读技能与环保意识，教师可借助清晰流程与多样活动高效教学。

Unit 4 The Wonders of Nature Reading Plus Learning Objectives To recognize, understand and apply key desert-related vocabulary and phrases; use skimming and scanning to find key information and finish the mind map; understand descriptive texts, extract details and conduct simple paraphrasing To be able to put forward proper solutions to the problem of the growing desert, such as saving energy, reducing pollution and planting trees, and develop the ability to solve practical problems. To listen to others’ opinions in group discussions, express one’s own ideas, explore problems together, and improve cooperative learning and communication skills. To learn about the nature and culture of the Sahara Desert, realize the importance of environmental protection and develop the sense of protecting nature and the earth. Hello, everyone! I’m Billy. Today, let’s explore North Africa’s great natural wonder! Watch and Say What is the video about? Free Talk What do you know about the Sahara Desert? It is in ... It is the ... in the world. ... There is ... Would you like to know more about the Sahara Desert? Let’s read the passage below. Read and Think Tip: We can Identify the text type by key words, such as numbers, tenses, examples and so on. What is the type of this passage? A. A story B. A new report C. A popular science expository text How do you know it’s a popular science expository text? 1. Using numbers 2. Using Simple Present Tense (一般现在时) 3. Using examples 科普说明文 4. Making a comparison (作对比) Read and Answer Read Para. 1 (location, size, age) and answer the questions. Located in Africa, the Sahara Desert spreads across 30 percent of the continent. This vast desert, also known as " the great desert " in Arabic, is about 9 million square kilometres in size. It is also at least 4.6 million years old. This means that it is one of the oldest places in the world. It is located in Africa. 1. Where is the Sahara Desert? 2. How large is the Sahara Desert? It is about 9 million square kilometres in size and spreads across 30 percent of the African continent. 3. Why is the Sahara one of the oldest places in the world?? Because it is at least 4.6 million years old. Tip: We can use the number clue method(数字定位法), circle numbers quickly to find key information. 横跨,覆盖 /v st/广阔的,巨大的 be known as 被称为 Read and Complete Read Para. 2 (climate) and fill in the blanks. All deserts are dry, and the Sahara is both dry and hot. It is the largest hot desert in the world. We may think that all deserts are hot, but in fact some deserts are very cold! Many scientists believe that Antarctica, for example, is a type of cold desert. Tip: We can use the transition word method(转折词定位法), find words like “but, in fact...” to catch comparison information. Climate Places All deserts the Sahara Desert Antarctica dry dry and hot a type of cold desert / n t kt k / 南极洲 Read and Circle Read Para. 3 (geography) and circle T for true or F for false. Most of the Sahara is rocky ground. But there are also places with grass, lakes mountains, and even sand seas. A sand sea is just what it sounds like—it looks like a sea of sand! When the wind blows, the sand looks like waves. Tip: We can get detailed information by finding key words. 1. Most of the Sahara is sandy. 2. There are grass, lakes, mountains and sand seas in the Sahara. 3. A sand sea is a real sea with water. 4. When the wind blows, the sand looks like waves. T F T F T T F F rocky ground a sea of sand Read and Answer Read Para. 4-5 (life) and answer the questions. Life in the Sahara is difficult. About two million people live in the Sahara. They usually move from place to place. There is water in a few parts of the Sahara, and some people live in these places all year round. Not many animals can live in a place with such a dry and hot climate. They must adapt to survive. Camels, for example, go for a long time without drinking water. When they do find water, they can drink more than 100 litres of it in 13 minutes! Fennec foxes live in the desert too. They have large ears to help their bodies stay cool. 1. Why do some people live in the same place all year round? Because there is water in these parts of the Sahara. 2. What helps fennec foxes’ bodies stay cool? Their large ears help their bodies stay cool. Tip: We can get detailed information by finding key words. Read and Answer Read Para. 6 (growth) and answer the questions. Today, the world's largest hot desert is getting even bigger. It is now about 10 percent larger than what it was about a century ago. But why is it growing? Some scientists believe that part of the reason is climate change. As temperatures rise, summers in Africa grow hotter and less rain falls. Water bodies get smaller and the ground gets drier and drier. If we do not take effective measures, the desert will keep growing! According to some scientists, why is the desert growing larger?? Part of the reason is climate change. As temperatures rise, summers in Africa grow hotter, less rain falls, water bodies get smaller and the ground gets drier and drier. 随着 keep doing sth一直做某事,继续做某事 采取有效措施 变得越来越干燥 Think and Talk 1. What do you think will happen if the Sahara keeps getting bigger? If the Sahara keeps growing, more land will become dry. It will be bad for the climate and environment, and people and animals there may lose their homes. (答案不唯一) 2. What should we do about it? Fourth, everyone ought to take action to fight climate change. (答案不唯一) Second, we’d better save water every day. First, we should plant more trees and stop cutting down trees. Third, we need to protect the environment together. Complete and Retell Read the text and complete the mind map. Then retell the passage by the mind map. Age The Sahara Desert Size at least 4.6 million years old Geography Location Growth Life most places are rocky; some have grass, lakes, mountains and even sand seas in Africa about 10 per cent larger than what it was about a century ago difficult about 9 million square kilometres Discuss and Share Discuss in groups and share your ideas about the following questions. 1. How is life in the desert different from other places where people live? Life in the desert is rather difficult. To begin with, water is very hard to find, so people often have to move around. Besides, the desert weather is very dry and hot. However, people in other places can live in comfortable homes with enough water, and the climate there is much better. /... 2. Would you like to visit the Sahara Desert or even live there for a while? Why or Why not? Yes, I’d love to. Because I want to see the beautiful sand mountains and experience the special life in the desert./... No, I wouldn’t. Because the weather there is too hot and dry. It’s hard to find water, and life is very difficult./... Read and Learn Language Points 1. There is water in a few parts of the Sahara, and some people live in these places all year round. 撒哈拉沙漠的一些地方有水,一些人常年生活在这些地方。 all year round意为“常年,全年”,通常作时间状语,可置于句末、句中或句首。 2. They must adapt to survive. 它们必须适应才能生存。 adapt to意为“适应......”,后接名词或动词-ing. eg: It’s hard to adapt to the desert life. 很难适应沙漠生活。 People must adapt to living in dry places. 人们必须适应住在干燥的地方。 3. It is now about 10 percent larger than what it was about a century ago. 它现在比大约一个世纪前大了约10%。 Summary What did you learn today? Age Size at least 4.6 million years old Geography Location Growth Life most places are rocky; some have grass, lakes, mountains and even sand seas in Africa about 10 per cent larger than what it was about a century ago difficult The Sahara Desert about 9 million square kilometres Teacher’s Words Don’t let your _ control you. Try to calm down. Nature is precious. We must treat it well and keep it beautiful forever. Basic(必做) 复习并牢记本堂课的重点单词、短语。 Improving(选做) 绘制 "撒哈拉沙漠环保海报",配英文标语。 Extend(选做) 网上搜索有关中国塔克拉玛干沙漠的纪录片,用2-3句英语描述它与撒哈拉沙漠的区别。 Homework Thank you! $