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课件网) 人教版八年级上册 Unit 4 Amazing Plants and Animals SectionB 3a-3c&Project Learning objectives 1. 能够通过阅读获取蓝鲸的基本信息，包括体重、栖息地、食物、寿命和在自然界中的作用，构建对蓝鲸物种的完整认知框架。 2.能够运用第一人称转换文本视角，以蓝鲸的口吻介绍自身特征，掌握人称和语态的变化；能够根据文本信息组织语言，独立完成一段关于蓝鲸的连贯描述。 3. 引导学生了解生物蓝鲸对于生态系统的重要性，从而进一步了解动植物对于生态系统的重要性。 4.运用本单元所学语言，选择或创建海报标题，收集所选动植物的图片和信息（名称、生长 / 栖息之地、选择原因、有趣事实等），制作海报并在班级展示，深化对动植物重要性的认识 1 2 3 They are huge . They live in the sea. They can sing songs. 4 They can jump high out of water. 5 Some of them are very clever and also very friendly. whale adj. 巨大的；极多的 Guess an animal Warming-up 鲸的体型是世界上存在的动物中最大的，它是终生生活在水中的哺乳动物，对水的依赖程度很大。鲸形状像鱼，鼻孔在头的上部，用肺呼吸。它体长可达三十米，是现在世界上最大的动物。鲸为适应水中生活，减少阻力，它们的后肢消失，前肢变成划水的浆板。身体成为流线型，酷似鱼。因而它们的潜水能力很强，小型齿鲸可潜至100-300米的水深处，停留4-5分钟，长须鲸可在水下300-500米处待上1小时，最大的齿鲸———抹香鲸能潜至千米以下，并在水中持续2小时之久。 虎鲸 座头鲸 Let’s enjoy a video about blue whales. Warming-up What do you know about whales live in the ocean Facts about whales the largest and heaviest animal Its tongue is as weigh as an elephant Their loudest sound can be heard up to 1,000 miles away. Do you konw anything about them Read the text quickly and circle some interesting facts about Blue Whale. While-reading 3a What information about blue whales can you find Blue whale facts Weight Where they live Food How long they live Role in ecosystem It can weigh as much as 200 tons. In all oceans except the Arctic Ocean. Some of the tiniest animals in the ocean, around four tons of them a day. Up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea, lasting for over a year and helping to create a lively and healthy ecosystem. The blue whale is the largest and heaviest animal on earth. It can weigh as much as 200 tons. Many people like watching blue whales swim, and they think it is one of the most beautiful things to see. Blue whales live in all oceans except the Arctic Ocean. They eat a lot, but they eat some of the tiniest animals in the ocean. A blue whale can eat around four tons of these a day. Blue whales can live up to 90 years. When a blue whale dies at sea, it becomes food for many kinds of animals living in and around the sea. This food lasts for over a year and it helps to create a lively and healthy ecosystem. Blue whales play an important role in our world, so we must protect them. 在地球上 多达，达到…… 之多 / n/ n. 大海；海洋 / k sept/ prep. 除……之外；除了 tiny / ta ni/ adj. 极小的；微小的 live up to 达到；符合 lively / la vli/ adj. 精力充沛的 ... ...
