Bài giảng Tiếng Anh - Unit 9: Undersea world

Undersea worldUnit 9UNDERSEA WORLDSHARK [∫ɑ:k]DOLPHIN['dɔlfin]WHALE/weil/SPERM WHALE/ spə:m weil/STARFISH/ 'stɑ:fi∫ /TURTLE / 'tə:tl /SEAL /si:l /Jellyfish /'dʒelifi∫/Coral / 'kɔrəl /5 OCEANS OF THE WORLDThái Bình Dương Ấn Độ Dương Đại Tây Dương Bắc Băng Dương Nam Băng Dương Gulf /gʌlf/ (n) a large area of land that is partly surrounded by seaGULF OF MEXICObay / bei / (n) a part of the sea, or of a large lake, enclosed by a wide curve of the shoreCrescent BayCan Garden Baysubmarine / ,sʌbmə'ri:n / (n) a ship that can travel underwater e.g. a nuclear submarinechallenge / 't∫ælindʒ /(n) a new or difficult task that test sb’s ability or skill.e.g. New technology is one of the challenges schools must face.(v) to test sb’s ability or skill, especially in an interesting way.e.g. The job doesn’t really challenge her.challenger (n) ['t∫ælindʒə] 	challenging (a) ['t∫ælindʒiη] e.g. Protecting environment is a challenging matter.to investigate / in'vestigeit / (v)to find out more information and facts about a subject or problem by study or researchinvestigation (n) [in,vesti'gei∫n] investigator (n) [in'vestigeitə] The woman is investigating the footprintWater current (n)  / 'kʌrənt /the movement of water in the sea or a riverorganism / 'ɔ:gənizm / (n)	a living thing, especially one that is extremely smallat stake / ət steik / : at risk, in dangerE.g.: If we don’t pay more attention to the protection of marine life, it may be at stake.biodiversity / ,baioudai'və:siti / (n)bio- : connected with living things or human lifediversity : the quality of including a range of people or things the existence of a large number of different kinds of animals and plants which make a balanced environmentRead the text	There is only one ocean. It is divided into five different parts: the Pacific, Atlantic,Indian, Antartic, and Arctic Ocean. There are also many other smaller seas, gulfs and bays which form part of them. Altogether they cover 75 percent of the earth’s surface. For centuries, people have been challenged by the mysteries that lie beneath the ocean. However, today’s scientists have overcome many of the challenges of the depth by using modern devices. They send submarines to investigate the seabed and bring samples of marine life back to the surface for further study. Satellite photographs provide a wide range of information, including water temperature, depth andthe undersea populations. If modern technology did not exit, we would never have such precious information. 	Marine plants and animals fall into three major groups. Some of them live on or depend on the bottom like the starfish. Some are swimming animals such as fishes and sharks that move independently of water currents while others are tiny organisms that are carried along by the currents like the jellyfish. Plants and animals of the sea, however small or oversized, all contribute to its biodiversity. Unless this biodiversity were maintained, marine life would be at stake. Task 1Some plants and animals are referred to as  organisms because they are extremely small.2. Thanks to modern technology, scientists have been able to .the life of plants and animals that live under the sea.3. A  is a large area of sea that is partly surrounded by land.4.  is a term that refers to the existence of different kinds of animals and plants which make a balanced environment.5. These scientists have collected different to analyse for their experiment.biodiversity oversized gulf challenges investigate samples tidy provide. investigategulfBiodiversitysamplestinyTask 2: Next What percentage of the earth’s surface is covered by seas and oceans?75 percent of the earth’s surface. How do scientists now overcome the challenges of the depth?By using modern devices. What can submarines do to help scientists know about the undersea world?They investigate the seabed and bring samples of the marine life back to the surface for furtherstudy. What can we learn from the satellite photos?We can know a wide range of information, including water temperature, depth and the undersea populations. What are the three groups of marine plants and animals?They are those that live on or depend on the bottom like the starfish, those that move independently of water currents like fishes and sharks and those that are carried alone by the currents like the jellyfish. What would happen if the sea biodiversity were not maintained?The marine life would be at stake if the sea biodiversity were not maintained. Plants and animals discoveries huge modern closely connected three-quaters mysterious biodiversityThough covering ................. of theearth’s surface, the ocean hasremained  to us until recently. With  technologywe have now made important  about the  of marine life. We have learnt that whether tiny or , all the ..................... of the sea are .three-quartersmysteriousmoderndiscoveriesbiodiversityhugeplants and animalsclosely connectedRiddleThanks for your attentionRIDDLE3. a. It is not a fish	c. It often attacks people and ship.1. a. It is a very large kind of sea-fish.c. People often hunt it for oil and flesh.b. It is the largest mammal in the sea.2. a. It is a large kind of sea-fish.b. It has got a large mouth, sharp teeth and a triangular fin.b. It is an animal that is almost all mouth and armsc. Its arms give it the shape of a starWhaleSharkStarfishRIDDLE6. a. It is one of the strangest looking fish	c. They don’t walk well on land.4. a. They are not really fishc. They are made almost entirely of water, which is why you can look through them. b. They have no bones at all. 5. a. Like dogs and whales, they are mammals.b. They are excellent swimmers.b. It has a slim body and a thin, flexible tail. JellyfishSealsSea horsec. It has big eyes and a long, tube-shaped mouth that looks like the snout of a horse.