1、Unit 1 Reading 1 The evolution of video and sound devices 高中英语高中英语 必修（第三册）必修（第三册） Unit 1 Nature in the balance Reading 1 The Amazon rainforest: a natural treasure 1. What plants or animals do you know about? What is special about them? Pre-reading sloths giant redwoods 2. Have you ever watched a doc
2、umentary before? 3. If so, what was the documentary about? What impresses you most about the documentary? 4. If not, why havent you? 5. What is special about the language employed in a documentary? Pre-reading The Amazon rainforest: a natural treasure 6. What do you think this script is about judgin
3、g from the title and the illustrations? Pre-reading Para. 1: Introduction to the Amazon rainforest Para. 2: Basic information about the rainforest Para. 3: _ Para. 4: _ Para. 5: _ _ A1 Plant biodiversity; levels of the rainforest Animal biodiversity; food chain The rainforests value to the human rac
4、e; threats to the rainforest While reading Read the documentary script and write the main idea of each paragraph. Sample answers: (1) 8 (3) 6,400 (5) 1,300 (7) 20% (2) 6 million (4) 40,000 (6) 400 (8) 17% A2 Read the documentary script again carefully and fill in the blanks with the figures. While r
5、eading Read Paragraph 3 and complete the mind map about different levels of the rainforest. While reading (4) (3) (2) (1) a system of roots beneath the ground The forests different levels the mass of leaf litter shorter plants with large leaves towering ancient hardwoods the tops of the tallest tree
6、s Read Paragraph 4 and complete the following chart about the food chain in the rainforest. While reading nutrients in the earth insects (4) leaves and fruits (1) (2) (3) frogs jaguars microorganisms The forests food chain While reading Basic information location and size Name: getting its name from
7、 (1) _ richest (2) _ Amazon rainforest Animals more than 1,300 species of birds and over 400 species of (5) _ elements of this forests (6) _ Plants more than 40,000 (3) _ different (4) _ of the forest Significance fix carbon and producing (7) _ having species used for (8) _ Danger the major danger:
8、(9) _ disappearing due to human activities such as (10) _ and cattle farming the Amazon river biodiversity plant species levels mammals food chain oxygen food or medicine us/human beings agriculture The Amazon rainforest is on the South American continent, covering an area of around 6 million square
9、 kilometers. The Amazon rainforest gets its name from the Amazon River, which is about 6,400 kilometers in length. Different ecosystems supported by the Amazon River give this area the richest biodiversity on the Earth. While reading Summarize the script based on the chart above. More than 40,000 pl
10、ant species can be found in the Amazon rainforest. The different levels of the forest support a great variety of wildlife and each level forms its own little world. More than 1,300 species of birds and over 400 species of mammals can be found here. All these species are the elements of this forests
11、food chain. While reading Summarize the script based on the chart above. Known as the “lungs of the planet”, the Amazon rainforest breathes life into the planet by fixing carbon and producing oxygen. And there are many species that can be used for food or medicine. The forest faces a major danger fr
12、om us. Human activities such as agriculture and cattle farming are affecting the rainforest. While reading While reading A3 1. What makes the Amazon rainforest a natural treasure according to the script? The Amazon rainforest is unique, beautiful and valuable. It contains 10% of all known species on
13、 the Earth. It produces over 20% of the planets oxygen. Its wonderful plant and animal species have enabled humans to make amazing discoveries. While reading A3 2. What is your answer to the question at the end of the script? Support your opinion with information from the script or other sources. No
14、. The Amazon rainforest is far too important for us to allow it to be destroyed. It helps maintain the balance of the ecosystem and provides our society with food and medicine. While reading In the sentence “Yet there is one major danger to these irreplaceable plants and animals: us.” (Page 3, Lines
15、 3334) , why “us” is used instead of “human beings” here? By using “us” instead of “human beings”, the author wants to emphasize that every one of us is responsible for the damage to the rainforest. Therefore, all of us have a part to play in protecting it. B1 While reading The Amazon rainforest is
16、home to a great (1) of plant life; however, its soil is surprisingly poor in nutrients. 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
17、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 as high as 12 metres. When the water goes away, it takes away the nutrients in the soil. For another thing, variety agriculture survive impact Whi
18、le reading (5) the Amazons 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 forests nutrients are locked up in the plants themselv
19、es, (8) allowing them to grow at an unbelievable speed. due to are broken down beneath thus Words formed with negative prefixes B2 Prefixes Words un- dis- in-/im- /il-/ir non- unbelievable, unlimited, unhappy, unknown, unusual, unreal, unfortunate, unlucky, unkind While reading disappear, disagree,
20、disadvantage, dissatisfied, dishonest, disabled irreplaceable, invisible, incorrect, inactive, independent, impolite, imbalance, illegal, irregular, irresponsible non-smoking, non-stop, non-existent, non-profit, non-fiction Homework 1. Write a summary of the script based on the chart discussed in class. 2. Finish the workbook. Homework 1. Read this article aloud. 2. Finish the workbook. 谢谢 谢谢
