Unit 1 Nature in the balance Reading 课件-2025-2026学年高一下学期英语译林版（2020）必修第三册

B3U1 Nature in the Balance Amazon Rainforest: a natural treasure 主讲: Stella 1 1. a sea of 2. be alive with 3. play a significant role/part in 4. maintain the balance of 5. with an area of 6. more than half the size of 7. in length 8. be made up of 9. biodiversity 10. be home to 大量的，大片的 充满，到处都是 在...中扮演重要角色 保持...的平衡 面积为... 超过...面积的一半 在长度上 由...组成 生物多样性 是...的栖息地 11. living things 12. food chain 13. feed on 14. in turn 15. an army of 16. break down 17. breathe life into 18. be known as 19. treasure house 20. due to 21. afford to do sth. 生物 食物链 以...为食 相应地 一大批... 使分解（成） 给...带来起色 被称作，被认为是 宝库，宝地 由于，因为 承担/支付得起做某事 What can you see in the picture? Where could it be? Step1 Engagement Step1 Engagement Where could it be? What do you think this documentary script is about from the title and the picture? Predicting: animals plants location significance/value Values/significance and threats Step 2 General reading Tip: Topic sentence is always in the first or the last sentence of each paragraph. Task 1 :Read and write the main idea of each paragraph (part A1). Animal biodiversiy:food chain Plant biodiversity:levels of the rainforest Introduction to Amazon rainforest Basic information about Amazon rainforest Para. 1: Introduction to the Amazon rainforest Para. 2: Basic information about the rainforest Para. 3: _____________________________________ Para. 4: ______________________________________ Para. 5: ______________________________________ Analysing the structure Task 1 Read the documentary script and write the main idea of each paragraph (part A1). Plant biodiversity：levels of the rainforest（plants） Animal biodiversity：food chain （birds and animals） The rainforest’s value to the human race; threats to the rainforest Read it carefully and finish the tasks. 1. Fill in the blanks with figures. (Page 4, A2) 2. Point out different levels of the rainforest. 3. Draw a map of the food chain in the rainforest. Step 3 Inspectional reading Step 3 Inspectional reading: statistics 6,400 6 million 8 17% 20% 400 40,000 1,300 What is the function of using statistics(数据) in documentary script? They can make the facts more convincing(让人信服的) , impressive(给人印象深刻的)and persuasive(有说服力的). What are China and Yangtze River mentioned in the script? To make comparison. Making comparison can make readers gain a better understanding while the statistics and facts are too abstract(抽象) to understand. a system of roots The forest’s different levels support an unbelievable variety of wildlife. the tops of the tallest trees the mass of leaf litter shorter plants with large leaves towering ancient hardwoods ➪ There are _______ levels of plant species. 5 At the bottom Above that The next level Then Finally the top Para. 3 :Plant By using space order Para 4 :Food Chain We ______ at least 87 species, including frogs. feed on We ______ insects feed on We eat ____ and fruit leaves We __________ body and return the nutrients to the earth. break down How does the author support his topic in this paragraph? By giving examples Jaguar Frog microorganisms incects plants By listing numbers By giving examples By using space order By making comparison ...... Task 1: Summarize the strategies to read an exposition. Para. 5 : Significance and danger 1. Why does the Amazon rainforest play a significant role in maintaining the balance of the Earth's ecosystem? the “lungs of the planet” a treasure house of species for food and medicine materials 2. What's the major danger in the Amazon rainforest? What's the situation of the Amazon rainforest over the past 50 years? major danger :us / human beings About 17% of the rainforest has disappeared due to human activities. Tip:寻找why的问题要找——therefore/thus/so/because Step 4 Expansion Task 1: Summarize the importance of Amazon rainforest. Amazon rainforest It fixes carbon and produces oxygen. It is a treasure house of species that can be used for food or medicine. It is the “lungs of the planet” that can clean the air. It maintains the fine balance of the Earth’s ecosystem. Plants forms different levels of the forests, making it home to different kinds of living things. The vast area offers the richest biodiversity. Task 2: Watch a video and write down the possible ways of protecting the Amazon rainforest. Group competition Step 4 Expansion What can we do to protect the Amazon rainforest? Cut fewer trees Eat less beef Use less paper Use green energy ...... Return farmland to forests Sentence patterns: We should... It is +adj. for sb. to do sth. Why not... In no case should we... Lucid water and lush mountains are invaluable assets. A small effort will make a big difference! Step 5 Homework 请写一封倡议书，呼吁大家关注亚马孙雨林的现状并予以保护。内容包括如下要点: 1.亚马孙雨林的现状和重要性； 2.给出一些必要的防范措施。 Dear friends, I am writing to call on everyone to pay attention to the protection of the rainforest. _________________________________________________________________________________________________________________________ Let’s take action to protect the rainforest now. Thank you! Students’ Union Work in a group of six: One student for present situation One student for importance Three students for measures One student for presentation SHOW TIME Present situation Importance Measures null 59479.71 null 2020 251575.92 $