2020-2021学年高二下学期英语外研版选修八 Module1 Reading and vocabulary 课件 (3)

Antarctica How much do you know about it? 信天翁 多雪海鸟 燕鸥 雪海燕 海燕 Fast-reading Look through the whole passage and find out the main idea of each paragragh: Para 1 Para2 Para3 Para4 Para 5 A. Animals and Plants B. the Discovery of Antarctica C.Brief Introduction of Antarctica D.The Antarctic Treaty E. A great place for researchers Careful-reading for more information • Antarctica is the coldest▬ ▬ ▬ place on Earth. It’s also the driest. • With annual rainfall close to zero, Antarctica is technically a desert. • Covering about 14 million square kilometers around the South Pole, it is the fifth largest continent in the world. Para.1 Brief introduction of Antarctica • A high mountain range, the Trans-Antarctic range, runs from east to west, cutting the continent in two. • There are volcanoes too, but they are not very active. • Antarctica holds 90% of the world’s ice, and most of its fresh water (70%) is in a frozen state, of course. 98% of the surface is covered permanently in the ice cap. …thick, but ….a depth of five kilometers. • Strong winds driven by gravity blow from the pole to the coastline, while other winds blow round the coast. • It is difficult to imagine a more inhospitable place. Para.1 Brief introduction of Antarctica Size: ________ square kilometers; the 5th_______ continent in the world Climate: ______ and______ on Earth 1.90% of__________, 70% in________, 98% is covered in_____ 2.The ___________ range 3.strong ______ 14 million largest driest the world’s ice a frozen state the ice cap Other geographical features: coldest trans-antarctic winds no but only few types is full of Para 2 wildlife & plants penguins seals whale moss algae lichen Why are there few types of plants which can survive there？ no only few types is full of but • .. the long Antarctic winter night, which lasts for 182 days, as well as the extreme cold and lack of rainfall, means that few types of plants can survive there. • …..南极冬天的夜晚长达182天，加 上气候极度寒冷，降水量极少，这 意味着很少有植物能够在这里生存 。 1.The key words of this paragraph: a window on the past 2.The examples to support the key words : gases & minerals antarctic rocks 3 How can they help the researchers? (1)Gases & minerals can tell___________________ (2) Antarctic rocks may contain__________________________ Para 3 A great place for researchers the climate in the past evidence of extra-terrestrial life Since most Antarctic rocks are dark in colour, they stand out against the white background and are easy to identify and collect. 1.The key words of this part: a window on the past 2.The examples to support the key words : gases & minerals antarctic rocks 3 How can they help the researchers? (1)Gases & minerals can tell___________________ (2) Antarctic rocks may contain__________________________ Para 3 A great place for researchers the climate in the past evidence of extra-terrestrial life Para 4 How was Antarctica discovered? Antarctica was the last continent____________. More than 2 thousand years ago,______________ believed there was a large land existing in the south. However, it was not until______________ that a ______ explorer crossed the _______ circle. In 1895, a_________ become the 1st man to_________ Antarctica and it was finally_______ on 11th December 1911. to be discovered Greek geographers the late 18th centuryBritish Antarctic Norwegian set foot on reached Para 5 Why was a treaty(条约) made? to prevent the____________and _________ use Aims ① to keep it free from____________ and_______________ ②to promote international _____________ ③ to end________ about who owns the land Result Antarctica has become perhaps the most successful symbol of man’s efforts to work together for progress and peace. commercial military nuclear test radioactive waste scientific projects arguments Group Work • What might happen to Antarctica if there were not the Antarctic treaty to protect it? • If there weren't the treaty, Antarctica would be in disaster. The reasons are as follows: • Firstly, there might be excessive(过度的,过 分的) commercial and military use of it， causing animals and plants to die. • Secondly, it might be polluted by nuclear tests or radioactive waste badly, which can leave ecosystem out of balance. • Finally, the arguments about who owns the land might cause another world war. Owing to the treaty, Antarctica has become perhaps the most successful symbol of man’s efforts to work together for progress and peace. Pair work: dialogue—making choose any one of the 5 topics to introduce the Antarctica : A: hello ,can I ask you some questions about Antarctica ? B: sure, go ahead A:…. B:.. 1. What is the climate like there? 2. Are there animals and plants (for example …)? 3. Do scientists love Antarctica? Why? 4. When was Antarctica discovered? 5. When was The Antarctic Treaty made? How many countries were involved(参与)？ Self evaluation（自我评价） • What do you think of your performance today? • What have you learned today? Topic: Antarctica: the last continent Time: May 25th Place: Beijing Museum Lecturer: Li Hua Homework: The Lecture Room(百家讲坛) invite you to give a lecture named “Antarctica: the last continent”. Prepare a speech paper(150words) Bye-bye!