Unit 5 Into the unknown Developing ideas课件-2024-2025学年高中英语外研版（2019）选择性必修第四册

外研版(219)选释挂必修回 Unit S Into the unkr Developing ideas Look at the picture and answer the questions. Do further research if necessary. >What different zones are there in the ocean? 洛 >Which parts of the ocean do you think have been explored? What do you know about the deepest part of the ocean? 0m- ≈20 Zone ●200m ℃ TwlightZone 5-10℃ ●1000m Midnight Zone 0-4C 4000m Abyssalone <0C 6000m 200m Epipelagic Zone (Sunlight Zone) 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 sgzoe 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 Mesopelagic Zone(Twilight Zone) 1,000m 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 thet oreae cone.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. Bthypelagice-The next layer is called the Bathypelagic Zone (Midnight Zone) bathypelagic zone.It is sometimes referred to as 4.000m the miomest 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 Abyssopelagic-The next Abyssopelagic Zone (The Abyss) layer is called the abyssopelagic zone also known as or 6.000m simply as the.It extends from 4.000 metres(13,124 feet)to 6,000 metres (19,686 feet).The name comes from a Greek word meaning "no bottom".The water temperature is near freezing.and there is no light at all.Very few creatures can be found at these crushing depths.Most of these are invertebrates such as basket stars and tiny squids.Three-quarters of the ocean floor lies within this zone.The deepest fish ever discovered was found in the Puerto Rico Trench()at a depth of 27,460 feet (8,372 metres) >What different zones are there in the ocean? The different zones in the ocean are Sunlight Zone Zone,Midnight Zone and Abyssal Zone >Which parts of the ocean do you think have been explored? Sunlight Zone,Twilight Zone >What do you know about the deepest part of the ocean? The deepest part of the oceans an area where the water depthsabout000 metres The verThese very deep ereasaosal zones".Actually it s the argest ecolo 比比苦LL 10.1(m) 海底10.1米 Look at the pictures and guess what it is for. 公，斗情