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课件网) Unit 1 Nature in the balance Welcome to the unit & Reading(I) Let us know, however, flatter ourselves overmuch on account of our human victories over nature. For each such victory nature takes its revenge on us. ——— Friedrich Engels 但是我们不要过分陶醉于我们人类对自然界的胜利。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 Watch the video about human and nature. Work in pairs. Share how you feel about the world we’re living in. The human race has done much harm. We have polluted our soils and seas, And cut down too many trees. Now is the time to sound the alarm. We want to live in a world that’s clean; We want to live in a world of green. The human race has done much harm; Now is the time to sound the alarm. What are the rhyming words in this song Let’s be thankful for the skies above; Let’s plant new trees and stop pollution; Let’s work together to find the solution; The Earth’s our home to protect and love. We want to live in a world that’s clean; We want to live in a world of green. Let’s be thankful for the skies above; The Earth’s our home to protect and love. Discuss the following questions in pairs. 1. What is the message of the song 2. What can you do to help protect the environment Humans have done much harm to the Earth, and we have to take action to change this situation. We can use less paper and fewer plastic bottles and bags. Cutting down on electricity usage can also help reduce the air pollution that power stations create. Pre-reading The Amazon rainforest: a natural treasure What do you think this script is about While-reading Match the main idea of each paragraph. Para 1 Para2 Para3 Para4 Para5 Basic information about the rainforest The rainforest’s value to the human race; threats to the rainforest Introduction to the Amazon rainforest Plant biodiversity：levels of the rainforest（plants） Animal biodiversity：food chain （birds and animals） What’s the function of Paragraph 1 A. To emphasize the importance of the Amazon rainforest. B. To explain why the Amazon rainforest is a natural treasure. C. To state the status of the Amazon rainforest: the largest rainforest. D. To lead into the following paragraphs. Introduction As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earth’s ecosystem. Para.1 Read and answer the question. 6,400 6 million 8 Para.2 Listen and fill in the blanks with figures. Para.3 Read and complete the mind map. The forest’s different levels Para.4 Read and finish the food chain. at least 87 species, including frogs leaves and fruit microorganisms feed on break down feed on feed on get nutrients insects the forest’s food chain ① ② ③ ⑤ ④ jaguars Para. 5 Read and fill in gaps. Significance The Amazon rainforest_____ _____the planet by fixing carbon and producing over 20 per cent of all the Earth’s oxygen. Moreover, the Amazon rainforest is a __ ... ...
