Unit 7 Section B 3a-self-check 课件 2023-2024学年人教版英语八年级下册

Unit 7 What’s the highest mountain in the world? Section B 3a-self check They are huge animals. They live in the sea. They can sing songs. They can jump high out of water. They are very clever and also very friendly. What are they? Pre-writing 鲸的体型是世界上存在的动物中最大的，鲸是终生生活在水中的哺乳动物，对水的依赖程度很大，以致它们一旦离开了水便无法生活，鲸形状像鱼，鼻孔在头的上部，用肺呼吸。体长可达三十米，是现在世界上最大的动物。 对于鲸鱼你知道多少？ 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。 3a Read the following words and phrases about whales. Put them in the correct place in the chart. What do they look like? Where do they live? What do they eat? What can they do? Huge Some kinds have teeth In the sea Small fish and other sea life Jump high out of the water Sing songs Why do some of them have to be protected? How can we protect them? Human catch whales for meat, fat and oil Water pollution Whale parts sold to make things like candles and soap Rules on whale protection Learn more about whales Stop putting rubbish into the sea Sing songs (to make people more aware of the importance of protecting whales) 3b Write a paragraph about whales and why they need to be protected. Use the information in 3a. Then make a poster. 思路点拨：首先将3a部分的知识整理归类。大致可以分为： General information about whales. Why do some of them have to be protected? How can we protect them? While-writing Whales are huge animals. They live in the sea and eat small fish and other sea life. They can jump high out of the water. They are in danger because humans catch them for meat, fat, and oil, and use whale parts to make candles and soap. And there is water pollution. We can make rules on whale protection and we should stop putting rubbish into the sea. I think people should learn more about whales. Here is a sample from you, let’s look at it. What do you think of this sample? Do you have any advice to make it better? Discuss Whales are huge animals. They live in the sea and eat small fish a