Unit 4 Lesson 8 Reading Plus（讲解课件）-【优翼·学练优】2025-2026学年八年级英语下册同步备课（人教版）

该初中英语课件围绕“撒哈拉沙漠”核心主题，通过视频导入和自由讨论激活学生对沙漠的已有认知，再以思维导图填空等学习支架引导梳理位置、大小、年龄等地理事实，构建知识脉络。 其亮点在于融合语言能力与思维品质培养，视频直观呈现沙漠特征，思维导图任务训练信息归纳能力，讨论“沙漠扩大的影响及措施”引导分析问题并提出方案，提升批判性思维。语言点结合文本实例讲解，助力学生掌握“spread across”等表达，既提升语言运用能力，又为教师提供结构化资源，提高教学效率。

Unit 4 The Wonders of Nature Reading Plus Learning Objectives In this lesson you will: 1.learn some geographical facts about the Sahara Desert. 2.think about what you can do for deserts. hot and dry lifeless dangerous lonely camel When it comes to deserts, we may think of: vast cactus (仙人掌) sandy ... beautiful landscape Here’s a video to help us know more about deserts! Free Talk Have you ever been to a desert? What do you think a desert is like? What’s the largest desert in the world? Some basic facts of the Sahara Desert: Location:_____________________________ Size:_________________________________ Age:_________________________________ Climate:______________________________ Animals:______________________________ in Africa 9,000,000 square kilometers at least 4.6 million years old hot and dry camels and Fennec foxes The Sahara Desert Located in Africa, the Sahara Desert spreads across 30 per cent 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. 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. 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. 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. Today, the world's largest hot desert is getting even bigger. It is now about 10 per cent 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 to stop climate change, the desert will keep growing! Read the text and complete the mind map. Sahara Desert Location Size in Africa about 9 million square kilometers Sahara Desert Growth Age Life Geography at least 4.6 million years old Most of the Sahara is rocky ground. But there are also places with grass, lakes, mountains, and even sand seas. difficult; two million people live here and they usually move around. It keeps growing and gets bigger because of climate change. 1. How is life in the desert different from other places where people live? Discuss the questions. Life in the desert is harder. There's less water, and people often move around, while in many other places, people have stable homes and enough water. 2.Would you like to visit the Sahara Desert or even live there for a while? I would like to visit the Sahara Desert because it looks very beautiful and special with its sand seas and rocks. However, I would not like to live there because life is too difficult, and there is not enough water. 3.What do you think will happen if the Sahara keeps getting bigger? What should we do about it? If the Sahara keeps getting bigger, more land will become desert, and it will be harder for plants, animals and people there. We should stop climate change by saving energy and planting more trees. Language Points 1. Located in Africa, the Sahara Desert spreads across 30 per cent of the continent. spread across 意为 “横跨；遍及；覆盖”，常指某物（如土地、区域、人群等）广泛地分布在某个大范围的空间里。 e.g. The forest spreads across the northern part of the country.（这片森林横跨该国北部。） 2. They must adapt to survive. adapt 是动词，意思是 “适应；调整” 常见搭配： adapt to + 名词 / 代词 适应…… adapt oneself to 强调 “使自己适应……”，oneself 可根据主语省略。 e.g. New students need time to adapt to the school life. （新生需要时间适应学校生活。） Some animals adapt quickly to changes in the environment. （有些动物能快速适应环境变化。） 3. When they do find water, they can drink more than 100 litres of it in 13 minutes! 这里的 “do” 是助动词，没有实际含义，主要作用是强调，用来突出 “当它们确实找到水的时候” 这个情况。 e.g. She does like reading books.（她确实喜欢读书。） We do want to visit the park this weekend.（我们确实想这周末去公园。） litre 是计量单位名词，指 “升”，用于衡量液体的体积，是国际通用的容量单位，缩写为 “L”。 常见搭配： 数词 + litres of + 液体名词 …… 升的…… e.g. I need to buy 2 litres of milk for breakfast. （我需要买 2 升牛奶当早餐。） 本文件著作权为创作公司所有, 仅限于教师教学及其他非商业性和非盈利性用途。如发现盗用、转卖、网络传播等侵权行为, 本公司将依法追究其相应法律责任。 部分素材选自网络, 如有争议, 请联系删改。 声 明 null 156872.8 $