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课件网) Unit7 The natural world 第2课时 Reading 译林版（2024）八年级 上 Learning objectives 1 Lead in Pre-reading 3 While-reading Post-reading 5 Summary Assessment 7 Homework 2 4 6 8 By the end of the lesson, I will be able to... 1 2 3 Master the pronunciation and meaning of key words such as ecosystem, pollution, and oxygen.; Be able to grasp the main idea of the passage by skimming and extract key information by scanning. Be able to discuss and express ideas related to ecosystems in English. 00 Learning objectives https://www.21cnjy.com二一教育 How many ecosystems are there in the video Watch a video https://www.21cnjy.com二一教育 Let's explore the three magic lands of the Earth—oceans, wetlands and forests. Oceans The largest ecosystem on Earth, covering 71% of the planet's surface. How big are they What can they do for the Earth Wetlands Unique ecosystems where water covers the soil for all or part of the year. Forests Large areas dominated by trees, covering nearly one-third of Earth's land. Lead in 01 Task1 What 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 things Pre-reading 02 https://www.21cnjy.com二一教育 Task2 Vocabulary Match-up ecosystem oxygen balance surface get rid of a. 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. While-reading 03 https://www.21cnjy.com二一教育 What are the three main ecosystems mentioned Task3 Fasting reading What 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. Ecosystem Coverage/Size Key Roles/Importance Nickname Oceans Wetlands Forests While-reading 03 Task4 Careful reading Covers around 71% of the earth’s surface Produces about 70% of the earth’s oxygen; Holds plenty of salt water; Plays a vital role in the water cycle The "heart" of the earth Covers about 6% of the earth’s land area home to around 40% of all plant and animal species; Helps purify water by getting rid of pollution; Prevents floods by storing water during heavy rains The "kidneys" of the earth Makes up nearly a third of the earth’s land area Plants absorb carbon dioxide and produce oxygen; Traps harmful things in leaves to clean the air The "lungs" of the earth While-reading 03 Task4 Careful reading c,e,i b,d,h a,f,g While-reading 03 Task4 Careful reading Read 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. C ... ...
