译林版初中英语八年级上册 U7 The natural world Reading 1 优质课件

8A Unit 7 The Natural World Reading 1牛津译林新教材How many ecosystems are there in the video? Watch a videoLead in01What is an ecosystem?An ecosystem includes all the (plants, animals, microorganisms) and (water, air, soil, sunlight) in an area, and they work together to keep balance.living things non-living thingsVocabulary Match-upecosystemoxygenbalancesurfaceget rid ofa. The top layer or outside part of something (e.g., the earth’s surface).b. A state of equal or proper arrangement between parts.c.To remove or eliminate something.d. A community of living and non-living things in an area.e. A gas that plants produce and animals need to breathe.What are the three main ecosystems mentioned?Fasting readingWhat are their nicknames?The three main ecosystems mentioned are oceans, wetlands, and forests.Oceans are nicknamed the "heart" of the earth.Wetlands are nicknamed the "kidneys" of the earth.Forests are nicknamed the "lungs" of the earth.Careful readingCovers around 71% of the earth’s surfaceProduces about 70% of the earth’s oxygen; Holds plenty of salt water; Plays a vital role in the water cycleThe "heart" of the earthCovers about 6% of the earth’s land areahome to around 40% of all plant and animal species; Helps purify water by getting rid of pollution; Prevents floods by storing water during heavy rainsThe "kidneys" of the earthMakes up nearly a third of the earth’s land areaPlants absorb carbon dioxide and produce oxygen; Traps harmful things in leaves to clean the airThe "lungs" of the earthCareful readingc,e,ib,d,ha,f,gCareful readingRead Para.1 and choose.What is an ecosystem made up of ?a Oceans, wetlands and forests.b Plants and animals.c Living and non-living things. B. Read the article again. Choose the correct answers to the questions.ecosystem n.系统a balanced ecosystem 平衡的生态系统 between ... and ... ......和......之间Careful readingRead Para.2 and answer the questions.Why is the ocean the largest ecosystem of the three?Because it covers around 71% of the earth’s surface and produces about 70% of the earth’s oxygen.plenty of...大量Careful readingRead Para.3 and answer the questions.What do wetlands do during heavy rains?Wetlands store water like huge sponges.be home to...是......的家园get rid of清除；去除；摆脱Careful readingRead Para.4 and choose.Which word can we use to replace the word “trap"?a keepb drivec producemake up占比；组成Careful readingRead the article and choose.Where can we read this kind of article?a In a newspaper. b In a travel guide. c In a geography magazine.C. Fill in the blanksbalance be home to surface oxygen get rid of take in storeroleThe biggest ecosystem Hello listeners! Welcome to Science with Doctor Ted. Today I'll talk to you about the biggest ecosystem on our planet. Do you know what it is? Yes, it's the ocean. It covers the largest area of the earth's (1) ______and holds 97% of the earth's water. It (2)_____________many animals and plants. Do you know that some of the plants in the ocean produce (3)_________for the animals living there? What's more, the ocean can (4) _______25%-30% of carbon dioxide and (5) _________heat. It plays an important (6) __________in slowing down climate change. Sadly, we're facing a serious problem: ocean pollution. There are millions of tons of plastic in the ocean, and it's very difficult to (7)_________it. It's time for us to take action and protect the ocean.If we don't, the plastic will harm the (8) _______________of the ocean ecosystem.surfaceis home tooxygentake instoreroleget rid ofbalanceC.Simon is listening to a podcast about the ocean ecosystem. Complete the the correct forms of the words and phrases in the box below.D. Think about the questions below.1.Why are the three ecosystems important for the earth?2.What are some of the non-living things in an ecosystem? Are they important? Give reasons.3.How do human activities affect the ecosystems? Give an example.Human activities can both harm and protect ecosystems.For example, people throw plastic waste into oceans, which poisons marine animals like turtles and fish. The three ecosystems (oceans, wetlands, forests) are vital for the earth because they work together to maintain ecological balance. Common non-living things in an ecosystem include water, air, soil, sunlight, and temperature. They are extremely important. Water and air are necessary for all living things to survive.D Think about the questions below. Share your answers with your classmates.Retell the passage Group workSpeak for Your Ecosystem!Your Ecosystem’s Importance“XXX is crucial because it...”2.Human Damage & ConsequenceExample: “Plastic waste in oceans kills fish.”3.Protection SuggestionsUse: “We should... / Let’s...”发言范例“Hello, we are Forest Defenders. Forests are the ‘lungs’ of Earth as they absorb CO₂. Deforestation makes animals lose homes. We should plant more trees and stop cutting them down.”Enjoy a videoIf oceans were damaged seriously, how would our daily life change?Tips：Think about oxygen, water, food...The words we have learnedecosystem oxygen二氧化碳 表面 生态系统氧气carbon dioxidesurface是…… 的家园 清除；去除 预防洪水 absorb harmful things be home toget rid ofprevent floods吸收有害物质The phrases we have learnedAssessment08Homework09默写核心词汇：ecosystem, oxygen, balance, surface, be home to, get rid of, purify（每个单词 / 短语写 2 遍，并标注中文释义）。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、核心作用、昵称及保护建议。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。