八年级英语下Unit 7 Section B-Self Check.ppt

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。 Read the following words and phrases about whales. Put them in the correct place in the chart. 1. Humans catch whales for meat, fat and oil 2. Eat small fish and other sea life 3. Jump high out of the water 4. Rules on whale protection 5. Huge 6. Water pollution 3a 7. Live in the sea 8. Some kinds have teeth 9. Learn more about whales 10. Stop putting rubbish into the sea 11. Sing songs 12. Whale parts sold to make things likes candles and soap What do they look like？ Where do they live? What do they eat? What can they do? Why do some of them have to be protected? How can we protected them? 5 8 7 2 3 11 1 6 12 4 9 10 Write a paragraph about whales and why they need to be protected. Use the information in 3a. Then make a poster. 3b 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 whales from… I think people should/shouldn’t… 1. Complete the chart. Adjectives Comparatives Superlatives high dangerous long popular higher highest more dangerous the most dangerous longer longest more popular the most popular 2. Match verbs and objects. Then add one more object to each list. Verbs Objects 1. reach a. my life, my money,… 2. achieve b. the top of a mountain, the library,… 3. risk c. my dream, success,… my health the ends the farmhouse 3. Circle the correct word and /or fill in the blank with the correct form of the word in brackets for each sentence. 1. An elephant weighs (few/many) times more than a dog. 2. An adult panda can eat (much/a little) more than a cat. 3. Canada is a (little/lot) less ______________ (crowded) than China. 4. A tiger is (much/a little) _________ (strong) than a man. crowded