(
课件网) Unit 5 Lesson 26 Keep the Candle Burning 1.学习目标 3.重点探究 2.自主学习 学习导航 5.当堂检测 6.课堂总结 4.拓展提升 新课导入 Do you like doing science experiments Why or why not Guess what will happen from the picture 学习目标 1.掌握本课新单词：shallow oxygen candle hoider burning. 掌握本课短语：use up , put on,in front of 2.能够听懂用动词原形开头来讲述句子,并掌握如何做成实验的正确用语 3.能用英语描述各个仪器的用途，以及实验过程 自主学习 holder [ h ld (r)] n. 持有者; 支持物 I screwed the lamp back in its holder. 我把灯拧回到了灯座上。 lighter [ la t (r)] n. 打火机; 点火器; 点火者; 驳船; shallow [ l ] adj. 浅的，肤浅的; 表面的，皮毛的; （水） 浅 Put the milk in a shallow dish. 将牛奶倒入一个浅盘里。 matches ['m t z] n. 火柴; 比赛（ match的名词复数 ）; 对手; 相配的人（或物）; e.g.Our team won three matches, drew one and lost two. examine [ g z m n] vt. 检查，调查; 考试; 诊察; 审问; vi. 检查; 调查; e.g.He examined the cat carefully. oxygen [ ks d n] n. [化] 氧，氧气; e.g. They are breathing pure oxygen. 他们在呼吸纯净的氧气。 重点探究 Can you see the candle holder in this picture The candle is pink. The candle holder is grey. The candle holder is “holding” the candle! What do you need a candle a candle holder a big glass jar a shallow dish some water a lighter or matches What do you do l. Put the candle in the candle holder. 2. Put the candle holder on the dish. 3. Fill the dish half full with water. 4. Light the candle. 5. Let the candle burn for two or three minutes. 6. Carefully put the jar over the candle until the top of the jar rests on the dish. 7. Examine the water in the jar. What can you see What is happening As the candle burns, it uses the oxygen in the air. When the candle stops burning, it has used up all the oxygen in the air. The water inside the jar rises. How far does the water rise Becase about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. Can you do this experiment 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 untilthe top of the jar rests on the dish. As the candle burns, it _____ the oxygen in the air. Whenthe candle stops _____, it has used up allthe oxygen in the air. The water inside the jar _____ and fills about _____ of the jar. This is because about one fifth of the air ismade up of oxygen. match 1 Read the lesson and fill in the blanks. Let uses burning rises one fifth Let's Do It! Let's Do It! 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 brothe ... ...
