Unit 7 Section B 3a-Self Check 课件2022-2023学年人教版八年级英语下册

Unit 7 What’s the highest mountain in the world? Section B 3a-Self Check At the end of this class, you will be able to: learn to use expressions to describe a kind of endangered animal like its appearance and living habits; write an article to introduce an animal with the structure of an expository passage. raise your awareness of animal protection and concern about nature. Lead-in Can you guess what the animal is? 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? Watch a video Do you want to know more about whales? What do you know about whales? whales food activities appearance living environment birth habits presentation 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。 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。 How much do you know about whales? 3a What do they look like? Where do they live? What do they eat? What can they do? They are huge and some kinds have teeth. They live in the sea. They eat small fish and other sea life. They can jump high out of the water and sing songs. Put them in the correct place in the chart. 3a Why do some of them have to be protected? How can we protect them? Because humans catch whales for meat, fat and oil and whale parts can be sold to make things like candles and soap, and also because of the water pollution. We should stop putting rubbish into the sea, learn more about whales and make rules on whale protection. Put them in the correct place in the chart. 3a While-writing 3b Write a paragraph about whales and why they need to be protected. Use the information in 3a. Then make a poster. Whales are… They live in… They eat… They can… One interesting fact is… Another interesting fact is… Some kinds of whales are in danger because … We should protect whal