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课件网) Unit 5 Into the unknown PART.01 Learning Objectives Understand the content of the text, understand the history, discoveries of human deep-sea exploration and the achievements made by China in deep-sea exploration. 01 Deepen their understanding of the thematic significance of the unit on the basis of understanding the text content, and establish a positive attitude of daring to explore the unknown and seeking truth scientifically. 03 Use the language knowledge learned in this unit to describe an unsolved mystery through investigation and research. 02 Learning Objectives Through reading, Students can understand the content of the text, understand the history, discoveries of human deep-sea exploration and the achievements made by China in deep-sea exploration. Students can use the language knowledge learned in this unit to describe an unsolved mystery through investigation and research. Establish a positive attitude of daring to explore the unknown and seeking truth scientifically. 01 02 Teaching Focuses and Anticipated Difficulties PART.02 Lead-in Look at the pictures and guess what it is for. Watch the video and answer the questions. Have you ever dived into the sea What do you know about the sea world Work in groups. Look at the picture and answer the questions. Do further research if necessary. 01 Epipelagic Zone - The surface layer of the ocean is known as the epipelagic zone and extends from the surface to 200 metres (656 feet). It is also known as the sunlight zone because this is where most of the visible light exists. With the light comes heat. This heat is responsible for the wide range of temperatures that occur in this zone. Work in groups. Look at the picture and answer the questions. Do further research if necessary. 01 Mesopelagic Zone - Below the epipelagic zone is the mesopelagic zone, extending from 200 metres (656 feet) to 1,000 metres (3,281 feet). The mesopelagic zone is sometimes referred to as the twilight zone or the midwater zone. The light that penetrates to this depth is extremely faint. It is in this zone that we begin to see the twinkling lights of bioluminescent creatures. A great diversity of strange and bizarre fishes can be found here. Work in groups. Look at the picture and answer the questions. Do further research if necessary. 01 Bthypelagic Zone - The next layer is called the bathypelagic zone. It is sometimes referred to as the midnight zone or the dark zone. This zone extends from 1,000 metres (3,281 feet) down to 4,000 metres (13,124 feet). Here the only visible light is that produced by the creatures themselves. The water pressure at this depth is immense, reaching 5,850 pounds per square inch. In spite of the pressure, a surprisingly large number of creatures can be found here. Sperm whales can dive down to this level in search of food. Most of the animals that live at these depths are black or red in color due to the lack of light. Work in gro ... ...
