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1、Warmingup and Reading I,Unit 3 Under the sea,Have you seen plants and animals that live under the sea?,Warming up I(5ms),Please enjoy some pictures!,Angel fish 天使鱼,Shark 鲨鱼,Sea star 海星,jellyfish 水母,Dolphin 海豚,Turtle 海龟,Anemone 海葵,Coral 珊瑚,Anemone fish 海葵鱼,After seeing pictures,show the video of“Find
2、ing Nemo”(海底总动员之海葵鱼）,Warming up II(3ms),1.Look at the picture in Pre-reading,then guess what is happening in the picture.2.Read the passage in Pre-reading,then show them the video about the killer whale(虎鲸）.,Pre-reading(3ms),What do you know about killer whales?,Common name:Killer Whale(杀人鲸),Scienti
3、fic name:Orcinus Orca（虎鲸）,虎鲸是一种大型齿鲸，由于性情十分凶猛，因此又有恶鲸、杀鲸、凶手鲸、逆戟鲸等称谓。它的身体强壮而有力，体形很大，呈纺锤形，表面光滑，皮肤下面有一层很厚的脂肪用来保存身体的热量。体长约为600-1000厘米，体重5000-8000千克。身体上的颜色黑白分明，背部为漆黑色，只是在鳍的后面有一个马鞍形的灰白色斑，两眼的后面各有一块梭形的白斑，腹面大部分为雪白的颜色。头部较圆，没有突出的吻部，鼻孔在头顶的右侧，有开关自如的活瓣，当浮到水面上时，就打开活瓣呼吸，喷出一片泡沫状的气雾，遇到海面上的冷空气就变成了一根水柱。前肢变为一对鳍，很发达，后肢退化消失
4、。高耸于背部中央的强大的三角形背鳍，十分显眼，雄兽的可达1.5米高，既是进攻的武器，又可以起到舵的作用。嘴很大，上下颌上共有40一50枚圆锥形的大牙齿，显出一副凶神恶煞的模样。虎鲸分布在世界各大海洋中，以南北两极附近水域最多，在我国见于渤海、黄海、东海、南海和台湾海域。虎鲸喜欢栖息在从0到12-13的较冷水域，温暖的海洋中数量较少，既使有也常常潜到水温较低的深水地带。它行动的流动性很大，一天就能游出100多公里，但较常出现在离海岸30公里以内的水域中。游泳前进的速度也很快，时速可达54公里。潜水的时间也很长，最多能达到30分钟以上。虎鲸猎食的对象主要是各种海洋兽类，如海豚、海狮、海象等，有时也
5、捕食乌贼和鳕鱼、鲆鱼、鲭鱼、沙丁鱼等各种海洋鱼类。虎鲸是凶猛的，海洋中的露脊鲸、长须鲸、座头鲸、灰鲸、蓝鲸等大型鲸类也都畏之如虎，就慌忙避开。虎鲸在捕食的时候还会使用诡计，先将腹部朝上，一动不动地漂浮在海面上，很像一具死尸，而当乌贼、海鸟、海兽等接近它的时候，就突然翻过身来，张开大嘴把它们吃掉。虎鲸喜欢群居的生活，有2-3只的小群，也有40-50只的大群，每天总有2-3个小时静静地呆在水的表层，因为肺部充满了足够的空气，所以能够安然地漂浮在海面上，露出巨大的背鳍。群体成员间的胸鳍经常保持接触，显得亲热和团结。如果群体中有成员受伤，或者发生意外失去了知觉，其它成员就会前来帮助，用身体或头部连顶带
6、托，使其能够继续漂浮在海面上，就是在睡觉时也扎成一堆，这是为了互相照应，并保持一定程度的清醒,Reading I Scanning(4ms),Read the text fast,and fill in the following blanks with the proper names:,1._ was 16 years of age when he went to work at the whaling station.2._ ordered Clancy to go to the boat as there was a whale out there in the bay.3._ was
7、 swimming by the boat,showing the whalers the way.,Clancy,Old Tom,George,4._ told Clancy that they would return the next day to bring in the body of the whale.5._ was carried by the waves further and further away from the whalers.6._ knew that Old Tom would protect James.,James,Red,Jack,ClancyA whal
8、erAnecdotesAt the beginning for the 20th century AustraliaThe killer whale help people to kill baleen whale,Reading II Skimming(6ms),Read the text again,then put the following sentences in the right order:,a.George started beating the water with his oar.b.Clancy grabbed his boots and raced after Geo
9、rge to the boat.c.Clancy arrived at the whaling station.d.The killers started racing between our boat and the whale.e.Clancy heard a huge noise coming from the bay.f.Clancy was sorting out his accommodation.g.Clancy ran down to the shore.h.The man in the bow of the boat aimed the harpoon at the whal
10、e.,3,2,4,8,6,5,1,7,主旨大意,Discussion,1.The author mainly tells us in the text that_.A.the killer whales are easily trained B.the killer whales can help the whalers catch the huge whales C.the killer whales kill the whales for their food D.the killer whales drag the whales under the water,B,2.Old Tom t
11、hrows itself out of the water and then crashes down in order to _.give the whalers the information about a whale tell the whalers it is hungry help the whalers catch the whale inform the whalers to run away,A,3.Why did the men start turning the boat around to go home after the whale died?Because the
12、y didnt need a dead whale Because they couldnt find the whales bodyBecause they knew that the dead whale wouldnt float up to the surface for around 24 hours.They had to do this because it was too late.,C,4.According to the text,the killer whales can protect men from being attacked by_.A.whales B.tigers C.enemies D.sharks,D,推理判断：,5.We can infer from the text that_.The killer whales may be trained by the whalers.The killer whales want to help man catch the whales themselvesThe killer whales need no training for helping the whalersThe killer whales want to eat the whales after killing them,A,
