Unit5 Lesson26 课件2024-2025学年冀教版英语九年级全册

The candles are burning. Unit 5 Look into Science Lesson 26 Keep the Candle Burning 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! holder [ˈhəʊldə(r)] n. 支托物;持有者 hold [ˈhəʊld] v. 抓住；持有 the candle holder 烛台 What will happen if you put a jar upside down over a burning candle? Let’s do the experiment. What do you need? ● a candle ● a candle holder ● a big glass jar ● a shallow dish shallow [ˈʃæləʊ] adj. 浅的 ● some water ● a lighter lighter [ˈlaɪtə(r)] n. 打火机；点火器 or matches match [mætʃ] n. 火柴； 比赛 v. 相称；相配 light [ˈlaɪt] n. 光 adj. 轻的；明亮的 v. 照亮；点燃 What do you do? 1. 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? examine [ɪɡˈzæmɪn] v. 检查 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? Because about one fifth of the air is made up of oxygen,the water rises and fills about one fifth of the jar. oxygen [ˈɒksɪdʒən] n. 氧气 The new words holder [ˈhəʊldə(r)] n. 支托物;持有者 shallow [ˈʃæləʊ] adj. 浅的 lighter [ˈlaɪtə(r)] n. 打火机；点火器 match [mætʃ] n. 火柴； 比赛 v. 相称；相配 examine [ɪɡˈzæmɪn] v. 检查 oxygen [ˈɒksɪdʒən] n. 氧气 the candle holder 烛台 examination n. 检查 知识点讲解 1. As the candle burns, it uses the oxygen in the air. as 做连词，此处表示“随着”； 还可表示“因为，由于；尽管” I didn't go to the party as I had a headache. 因为 As time goes by, we grow older. 随着 As much as I tried, I couldn't finish the task on time. 尽管 as 可做介词，表示“作为；像...一样” I didn't go to the party as I had a headache. 作为 He runs as fast as a deer. 像...一样 2. When the candle stops burning, it has used up all the oxygen in the air. stop to do sth. stop doing sth. 停下（某事）去做某事 停止做某事 use up 耗尽 = run out of use up 吃光 3. Because about one fifth of the air is made up of oxygen,the water rises and fills about one fifth of the jar. be made up of 由...组成 one fifth one fifth 1/5 分数表达： 分子用基数词，分母用序数词，当分子大于1时，分母加-s 2/3 two thirds “分数+of+名词”作主语时，谓语动词的单复数由of 后名词的形式而定。 【注意】  三分之二的书在架子上。 Two thirds of the books are on the shelf.  练一练 (　　)1.—________ did he jump? —About 2.5 metres. A．How much   B．How far C．How soon   D．How often (　　)2.Over ________ of the students went to the lab to do experiments. A．two third   B．two thirds C．second three   D．second thirds (　　)3.—How do you like the popular docu­mentary A Bite of China(《舌尖上的中国》)? —Excellent! You won't realize how wonderful our Chinese food is ________ you watch it. A．when   B．as C．after   D．until B B D (　　)4.—I'm sorry to have kept you________ for such a long time. —That's OK. I came here a minute ago. A．wait B．waiting C．waited D．to wait (　　)5.This music group is ________ five girls and three boys. A．made of B．made in C．made from D．made up of (　　)6.________ noise pollution, and we can live in a quiet environment. A．Prevent B．Preventing C．Prevented D．To prevent B D D (　　)7.Don't ________ all the soap. Leave me some to wash with. A．put up B．use up C．eat up D．call up (　　)8. BLisa made so many mistakes in her homework, because she didn't do it ________ enough. A．carefully B．busily C．quickly D．warmly (　　)9.He told the interviewer that he had 　　　　all the money to buy old bikes.  A.put away B.turned off C.taken out D.used up C A D Bye-bye $$