Unit 7 The natural world Reading 课件2025-2026学年译林版英语八年级上册

该初中英语课件围绕“生态系统”主题，聚焦海洋、湿地、森林三大生态系统的定义、特征及重要性。课堂导入从Revision激活已知生态系统知识，Pre-reading区分生物与非生物因素搭建基础，Prediction结合图片预测文章内容与体裁，形成从已知到未知的学习支架，帮助学生逐步构建主题认知。 其亮点在于多环节融合核心素养培养，While reading通过主旨与段落匹配、细节扫描分组练习提升语言理解能力，Appreciation赏析“海洋是地球的心脏”等比喻修辞发展思维品质，Consolidation借助图表整合信息训练学习策略，Discussion和Homework引导思考人类活动影响，渗透社会责任感。学生在语言实践中提升能力，教师可高效开展读写教学。

Reading Unit 7 The natural world 八年级上册 Revision Speak out! Which of the following ecosystems do you know best? Pre-reading What kinds of things do you think are in an ecosystem? plants animals … Living things Non-living things air water soil sunlight … An ecosystem Pre-reading What do you know about oceans, wetlands and forests? Prediction Prediction 1. What is the article about? It’s about the three main ecosystems on earth—oceans, wetlands and forests. 2. What can you see in the pictures? Picture 1: I can see dolphins and the ocean. Picture 2: I can see birds and a wetland. Picture 3: I can see trees and a forest. 3. What type of text is the article? It’s an expository text. While reading 1. Listen to the article and analyse its structure. Main ideas Paragraph(s) What is an ecosystem? (1) __________________ What are the three main ecosystems? (2) __________________ How important are the ecosystems? (3) __________________ 1 2–4 5 音频——P94，reading While reading 2. Scan the article and finish Part A on page 96. b, d, h c, e, i a, f, g While reading 3. Read the article again and finish Part B on page 96. While reading Paragraph 1 Read the following sentences. Write a T if a sentence is true or an F if it is false. Then correct the false one(s). _______ 1. An ecosystem includes only living things in an area. _______ 2. Ecosystems are always large, like grasslands or oceans. _______ 3. Every ecosystem has a special role and helps keep the planet balanced. F F T all the living and non-living things in an area. can be of different sizes. While reading Paragraph 2–4 E c o s y s t e m s The ocean— the “ (1) _________” of the earth · (2) _________ around 70% of the earth’s oxygen · Support the water cycle     Wetlands— the “ (3) _________” of the earth   Forests— the “ (6) _________” of the earth   · Be home to around 40% of all the types of plants and animals · Help (4) _________ pollution and make the water clean · Help prevent floods by (5) ___________ like huge sponges     · (7) _________ carbon dioxide and produce oxygen · (8) ___ harmful things and help clean the air heart Produces get rid of kidneys storing water lungs Take in Trap While reading Paragraph 5 What does each of these ecosystems support? Each of them supports millions of plants and animals. While reading Post-reading Finish Part C on page 97. surface is home to Post-reading oxygen take in store role get rid of balance Consolidation Introduce the earth’s main ecosystems with the help of the chart below. The ocean The ocean is a … It covers … and produces … It holds …, and … rises to …, falls onto … and then returns to … This goes on and on, so the ocean is just like … Wetlands Wetlands only cover … But they are home to … Plants in wetlands help get rid of … and … Wetlands can also help prevent … During heavy rains, wetlands store … They act like … Forests Forests make up … Plants there take in … and produce … They also trap … and help clean … Therefore, … Appreciation —— Simile Read the tip about similes on page 95 and underline the sentences that use similes. Appreciation —— Simile Appreciation — Simile The ocean is just like the “heart” of the earth. Wetlands store water like giant sponges. They act like the “kidneys” of the earth. Why does the writer use similes in these sentences? The writer uses similes to make it easier for readers to understand the importance of ecosystems. By comparing the ocean to one part of the human body and comparing wetlands to huge sponges, the writer helps readers understand how these ecosystem work and why they are important for life on earth. The similes also make the information more interesting and easier to remember. Discussion 1. Why are the three ecosystems important for the earth? The ocean, wetlands and forests are important because they help keep the earth’s air and water clean, and support millions of plants and animals. They keep the planet healthy and make our world a better place. 2. What are some of the non-living things in an ecosystem? Are they important? Give reasons. Some non-living things in an ecosystem include water, air, sunlight, soil and minerals. They are important to an ecosystem because they provide the necessary conditions for living things to survive. Homework Think about the questions below. Share your answers with your classmates. How do human activities affect the ecosystems? Give an example. Thank you! 2024 Blues 136632.0 $