Unit 1 Nature in the balance Reading 课件-2025-2026学年高中英语牛津译林版(2020)必修第三册

Nature in the balance B3U1 1 Lead in Let’s appreciate some pictures! Presentation a vast lake with mountains up and down; colorful flowers; a waterfall puring down ... wonders/beauty of nature Presentation However, Things are changing! Presentation air pollution large- scale desertification white pollution Unit 1 Nature in the balance Reading Let us not, however, flatter ourselves over much on account of our human victories over nature, for each such victory, nature takes its revenge on us. 恩格斯《自然辩证法》 P1 Welcome to the unit What is the message (信息) behind the song? What can we do to help protect the environment? Humans have done much harm to the Earth, and It’s time to take action. 2. What can we do to help protect the environment? plant more trees use less paper drive less and walk more use fewer plastic bottles and bags save water and cut down the use of electricity don't waste food don't use one-off/disposable things if possible, don't use air conditioners ... Discussion 1. We must protect our earth, which is home to a wide range of wildlife. 2. Let’s enjoy a video. Monkey, birds, river, forest, plants, waterfall and so on. 1. What can you see in this video? 2. Where is this place? In the Amazon rainforest. The Amazon rainforest: A natural treasure Type of passage What is the genre（体裁）? documentary script (原稿） A written version of documentary 14 Read the documentary script and finish the main idea of each paragraph. _______ biodiversity; ________of the rainforest _______ biodiversity; _______chain The rainforest’s ______ to the human race; ______ to the rainforest. Step1 Fast-reading: skimming As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earth’s ecosystem. Para. 1 Introduction of the forest Para. 2 Basic information about the forest location size feature： the richest biodiversity Para3 _______ biodiversity; ________of the rainforest Spatial order a system of roots(根系) the mass of leaf litter(落叶层) shorter plants with large leaves the tops(树冠) of the tallest trees towering ancient hardwoods(阔叶) _______ biodiversity; ________of the rainforest plant levels Para4 _______ biodiversity; _______chain _______ biodiversity; ________of the rainforest _______ biodiversity; _______chain plant levels Animal food Para5 the rainforest’s ______ to the human race; ______ to the rainforest Read the documentary script and finish the main idea of each paragraph. _______ biodiversity; ________of the rainforest _______ biodiversity; _______chain The rainforest’s ______ to the human race; ______ to the rainforest. plant levels Animal value threats Step1 Fast-reading: skimming food 6,400 6 million 8 17% 20% 400 40,000 1,300 Read Para. 2-5 quickly and fill in the blanks. 1. What is the purpose of using figures/numbers/statistics? 2. Besides just listing the figures, how does the script make the figures, the large figures in particular, understandable? To support the statement and make the statement more persuasive and convincing; to vivify the figures and the facts; By making comparisons. Critical thinking Jaguars insects at least 87 species, including frogs leaves and fruit microorganisms eat/ feed on break down feed on Read Para. 4 and finish the food chain. Circular循环的 feed on soil Post-reading an increase in deforestation a decrease in deforestation 27 Let us not, however, flatter ourselves overmuch on account of our human victories over nature. For each such victory nature takes its revenge on us. —Friedrich Engels 但是我们不要对我们人类对自然界的胜利过分自以为是。对于每一次这样的胜利，自然界都对我们进行报复。 ——弗里德里希·恩格斯 Let’s appeal to people around us to take continous action! 28 The Amazon rainforest is home to a great (1)_________of plant life; however, its soil is surprisingly poor in nutrients. B1 The passage below is from a website about the Amazon rainforest. Complete the passage with the correct forms of the words and phrases in the box below. agriculture impact thus due to variety survive beneath break down variety Building your language In fact, the soil in the region cannot support (2)____________ for more than a few years. If a scientist is shown a report listing the nutrients of that soil, he or she will probably think that only desert plants can (3)____________in it! Then why is the soil so poor in nutrients? For one thing, the rainy season has a(n) (4)___________on the soil. In the rainy season, the water level can rise to more than 12 metres. agriculture survive agriculture impact thus due to variety survive beneath break down impact When the water goes away, it takes away the nutrients in the soil. For another thing, (5)___________the Amazon's hot climate, it is difficult for the soil to build up enough nutrients. Dead plants and animals (6)_____________more quickly. The nutrients are soon taken in by the roots of the plants deep (7)_________the ground. As a result, most of the forest's nutrients are locked up in the plants themselves, (8)_________ allowing them to grow at an unbelievable speed. due to break down beneath thus agriculture impact thus due to variety survive beneath break down Lavf58.29.100 $