Unit7Reading1 课件 2025-2026学年译林版英语八年级上册

8A Unit 7 The Natural World Reading 1 www.21cnjy.com Activity1: Look and say 1. What ecosystems do you know on earth? 2. What kind of things do you think are in an ecosystem? Lead-in www.21cnjy.com Expository text说明文 Where can we read this kind of article? a In a newspaper. b In a travel guide. c In a geography magazine. Pre-reading www.21cnjy.com While-reading ① ② ③ ④ ⑤ a. What is an ecosystem? b.What are the ecosystems’ size and functions? c. Conclusion 总结 www.21cnjy.com What is an ecosystem made up of ? a Oceans, wetlands and forests. b Plants and animals. c Living and non-living things. While-reading Read Para.1 and choose. www.21cnjy.com www.21cnjy.com Mother Ocean Miss Wetland Grandpa Forest www.21cnjy.com Facts about us Find out our sizes and fill in the first column of the fact file. How big are we three ecosysterms ——oceans, wetlands and forests？ While-reading Tip1 Numbers are very important when you need information about facts, like size, time, date, age, etc.. www.21cnjy.com Ecosystem Size / Coverage Functions/Importance Roles Oceans Wetlands Forests Careful reading of the earth’s surface of the earth’s land area of the earth’s land area While-reading www.21cnjy.com While-reading 1/3 Expository text说明文 www.21cnjy.com Ecosystem Size / Coverage Functions/Importance Roles Oceans Wetlands Forests Careful reading of the earth’s surface of the earth’s land area of the earth’s land area While-reading Around 71% About 6% Nearly a third(1/3) Functions 作用? the largest scientific 科学的 persuasive 有说服力的 accurate 精确的 www.21cnjy.com Oceans The ecosystem on Earth, covering around of the planet's surface. Wetlands Only cover about of the earth’s land area. Forests Make up nearly of the earth's land area. largest 71% 6% one-third Functions 作用? （占地） scientific 科学的 persuasive 有说服力的 accurate 精确的 www.21cnjy.com What can we do to help the earth —— our functions(作用) and roles(角色)？ Find out our functions and fill in the 2 & 3 column of the fact file. Facts about us While-reading Tip2 When you do careful reading, try to focus on the key words, like verbs 动词, adjectives形容词 and nouns名词. work in pairs www.21cnjy.com Ecosystem Size / Coverage Functions/Importance Roles Oceans Wetlands Forests Careful reading of the earth’s surface 1. about 70% of ...oxygen; 2. plenty of salt water to the water cycle of the earth’s land area 1. to around 40% of ...; 2. Help the water ; 3. floods of the earth’s land area 1.Plants carbon dioxide and oxygen; 2. harmful...to the air While-reading Around 71% About 6% Nearly a third(1/3) www.21cnjy.com While-reading Expository text说明文 www.21cnjy.com Ecosystem Size / Coverage Functions/Importance Roles Oceans Wetlands Forests Careful reading of the earth’s surface 1. about 70% of ...oxygen; 2. plenty of salt water to the water cycle of the earth’s land area 1. to around 40% of ...; 2. Help the water ; 3. floods of the earth’s land area 1.Plants carbon dioxide and oxygen; 2. harmful...to the air While-reading Around 71% About 6% Nearly a third(1/3) "heart" "kidneys" "lungs" www.21cnjy.com Read Para.2 and find out the function of the ocean. While-reading www.21cnjy.com plenty of salt water rise fall return hold water cycle go on and on www.21cnjy.com support cycle support cycle is like They can both support the natural cycles. 它们都能促进自然循环。 Why is the ocean like the “heart” of the earth? water blood www.21cnjy.com Ecosystem Size / Coverage Functions/Importance Roles Oceans Wetlands Forests Careful reading of the earth’s surface 1. about 70% of ...oxygen; 2. plenty of salt water to the water cycle. "heart" of the earth’s land area 1. to around 40% of ...; 2. Help the water ; 3. Keep the of water. of the earth’s land area 1.Plants carbon dioxide and oxygen; 2. harmful...to the air While-reading Around 71% About 6% Nearly a third(1/3) Produce Hold support "kidneys" "lungs" www.21cnjy.com Read Para.3 and answer the questions. What do wetlands do during heavy rains? remove or take away sth While-reading a. They make the water clean. b. They hold water. c. They get rid of water. To explain complex functions, making the content more concrete. 为阐明复杂功能，使内容更加具体。 Example? sponge www.21cnjy.com Why do the wetlands act like the “kidneys” of the earth? Get rid of to clean water Keep the of water. balance pollution www.21cnjy.com www.21cnjy.com Why do the wetlands act like the “kidneys” of the earth? Get rid of to clean water Keep the of water. Help make the clean act like blood balance Keep the in our body They both get rid of waste and keep the water balance. 二者均能排出废物并维持水分平衡。 pollution water balance www.21cnjy.com Ecosystem Size / Coverage Functions/Importance Roles Oceans Wetlands Forests Careful reading of the earth’s surface 1. about 70% of ...oxygen; 2. plenty of salt water to the water cycle "heart" of the earth’s land area 1. to around 40% of ...; 2. Help the water ; 3.Keep the of water. "kidneys" of the earth’s land area 1.Plants carbon dioxide and oxygen; 2. harmful...to the air While-reading Around 71% About 6% Nearly a third(1/3) Produce Hold support Home make clean balance www.21cnjy.com Read Para.4 and choose. Which word can we use to replace the word “trap"? a keep b drive c produce While-reading www.21cnjy.com Take in and produce . are called carbon dioxide oxygen Take in and give out . carbon dioxide oxygen Why are the forests called the “lungs” of the earth? They both keep carbon-oxygen balance 两者均维持碳氧平衡 www.21cnjy.com Ecosystem Size / Coverage Functions/Importance Roles Oceans Wetlands Forests Careful reading of the earth’s surface 1. about 70% of ...oxygen; 2. plenty of salt water to the water cycle "heart" of the earth’s land area 1. to around 40% of ...; 2. Help the water ; 3. Keep the of water. "kidneys" of the earth’s land area 1.Plants carbon dioxide and oxygen; 2. harmful...to the air "lungs" While-reading Around 71% About 6% Nearly a third(1/3) Produce Hold support Home make clean take in produce Trap clean balance www.21cnjy.com Why are we connected with the humans’ organs（器官）? Further thinking Tip3 Similes（比喻） create similarity between two different things by using words such as like and as to help the reader better understand the text. www.21cnjy.com What does each of these ecosystems support? While-reading They support millions of plants and animals, including humans. How important are they? www.21cnjy.com heart kidneys lungs They make the planet healthy and make our world a better world. www.21cnjy.com Further thinking If there aren’t any oceans/forests/ wetlands on earth, what may happen? www.21cnjy.com 33 Further thinking: Humans Ecosystems VS What’s the relationship between them? We rely on each other，so we should live in harmony with each other. 我们互相依赖,应和谐共处。 www.21cnjy.com 34 www.21cnjy.com Speak to the ecosystems Work in group of 4 or 5 Choose an ecosystem Practise speaking to the ecosystem on behalf of humans (Use the information in the article.) Post-reading www.21cnjy.com Dear __________, I would like to say sorry to you on behalf of humans. After learning this lesson, I know how important you are.You cover ______ and you __________________for us. You are truly the ______ of the Earth. I am so sorry that we humans do many bad things to you. Some people__________________, which make you very angry and sad . To help you, I promise to________________. I will start doing this from today. Hope we can work together and make the earth better. Speak to the ecosystems www.21cnjy.com To treat the earth kindly is to treat ourselves kindly. www.21cnjy.com Basic (基础) Improving(提升) Extend (拓展) Homework 完成课时练习并熟读熟背本课单词。 从“oceans/wetlands/forests” 中选择一个生态系统，写一篇 80 词左右的短文，内容需包含：覆盖范围、角色、核心作用及保护建议。 选择一项环保行动（如 “减少使用塑料袋”“参与植树”“保护身边的湿地 / 公园”），实践后用英语记录过程与感受（可附照片），下节课分享。 Level C Level B Level A www.21cnjy.com Summary www.21cnjy.com $