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课件网) Unit 5 Look into Science Lesson 26 学习目标 1 2 3 To understand the meaning and usage of the new words and expressions. To learn to do the experiment by yourself. To learn the scientific method and enjoy science. Do you like doing science experiments Why or why not What experiments have you done or seen Please tell your classmates the one you like best. 新课讲授 What will happen if you put a jar upside down over a burning candle holder n. shallow adj. lighter n. match n. v. examine v. oxygen n. 支托物;持有者 浅的 打火机;点火器 火柴 相称;相配 检查 氧气 Presentation Memory test holder lighter 氧气 oxygen match 相配 检查 支托物 examine shallow 浅的 火柴 打火机 Practice The experiment needs a candle and matches. ( ) We need to put water in a bottle. ( ) The experiment proves the air has one fifth of oxygen. ( ) T F Listen to the text and judge the sentences: T Reading task Number the sentences according to the text. Put the candle holder on the dish. Examine the water in the jar. Fill the dish half full with water. Let the candle burn for two or three minutes. Put the candle in the candle holder. Light the candle. Carefully put the jar over the candle until the top of the jar rests on the dish. 5 7 3 4 1 2 6 What do yo do in the experiment 1. _____ the candle _____ the candle holder. 2. _____ the candle holder _____ the dish. 3. _____ the dish half full _____ water. 4. _____ the candle. 5. _____ the candle _____ for two or three minutes. 6. Carefully _____ the jar _____ the candle until the top of the jar rests on the dish. 7. _____ the water _____ the jar. What can you see in on Put Put Fill with Light Let burn put Read to the text, then fill in the blanks. over Examine in Talk about how to do the experiment in pairs: What do you need We need_____. What do you do First, _____. Second, _____. Then, _____. What is happening _____. Let’s do the experiment together! Put the candle in the candle holder. Put the candle holder on the dish. Fill the dish half full with water. Light the candle with a _____ or a lighter. What can you see The candle is burning. _____the candle burn for two or three minutes. Then carefully put the jar over it until the top of the jar rests on the dish. As the candle burns, it _____ the oxygen in the air.When the candle stops _____, it has used up all the oxygen in the air. The water inside the jar _____ and fills about _____ of the jar. This is because about one fifth of the air is made up of oxygen. Let match uses Read the lesson and fill in the blanks. burning rises one fifth Let’s do it! 1 1.Don’t (use up /push up) all of the ink. Leave some for me. 2.The medical team (is made of / is made up of) five experienced doctors. 3.Please fill the hole (with /in) sand and water. 4.They didn’t realize their mistake (until /as) we told them. 5.My brother wasn’t (strong enough/enough strong) to lift the box. Circle the correct words to complete the sentences. 2 S ... ...
