Unit 5 lesson 26课件 2024-2025学年冀教版英语九年级全册

Lesson 26: Keep the Candle Burning Unit 5 Look into Science 单词: holder, shallow, lighter, match, examine, oxygen 短语: use up, be made up of 句子: （1）As the candle burns, it uses the oxygen in the air. （2）When the candle stops burning, it has used up all the oxygen in the air. （3）Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. Learning Goals 1 能用英语流利地描述做实验需配备的器物，并讲述实验的步骤。 2 2 Free Talk Do you like doing science experiments? Why or why not? What will happen if you put a jar upside down over a burning candle? 3 Presentation 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 Science is so interesting! I’m sure you’ll like this experiment! 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? 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. Can you do this experiment? Vocabulary holder n. 支托物；持有者 shallow adj. 浅的 lighter n. 打火机；点火器 match n. 火柴 v. 相称；相配 examine v. 检查 oxygen n. 氧气 use up 用光；用完 be made up of 由……组成 Structures and Expressions Let’s do it! 1. Read the lesson and fill in the blanks. 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. match Let uses burning rises one fifth 2. Circle the correct words to complete the sentences. 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. Read about the experiment in this lesson. With a group of classmates, practice the experiment. Do your experiment in front of the class. Don’t forget the following things: · First, describe your experiment. ·Second, ask the class what they think will happen. ·Third, do the experiment. ·Finally, ask the class if the result is what they expected. REPORT ON AN ACCIDENT Language points 1. Keep the Candle Burning. 让蜡烛继续燃烧。 ◉ keep意为“保持”。 keep＋宾语＋形容词，意为“使……保持某种状态”；keep sb. from doing sth. 阻止某人做某事，相当于“stop sb.from doing sth.”；keep (on) doing sth. 继续，重复做某事。 ※ You just have to keep yourself busy and keep going. 你只要让自己忙起来，就能坚持下去。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 2. a lighter or matches. 打火机或火柴。 ◉ match意为“火柴，比赛 ；相称，相配”。 ※ The match flared and went out. 火柴闪亮了一下就熄了。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 3. Fill the dish half full with water. 装半盘子的水。 ◉ half意为“一半的；一半”，常见搭配为： half of…意为 “一半的……”，后接名词时，一般要在名词前加the、形容词 性物主代词或指示代词等。 ※ Nearly half of mothers with children under five have a job. 孩子不足5岁的母亲中近一半有工作。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 4. Light the candle. 点燃蜡烛。 ◉ light作动词时意为“点燃”；作名词时意为“光线，电灯”， 作“光线”讲时为不可数名词，作“电灯”讲时为可数名词； 作形容词时意为“浅色的，轻的”。 ※ The bright light made her look away. 强光使她把视线转向别处。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 5. Carefully put the jar over the candle until the top of the jar rests on the dish. 小心地把罐子放在蜡烛上，直到罐子的顶部落在盘子上。 ◉ until意为“直到……为止”，用于肯定句中，主句的谓语动词 一般是延续性的。 用于否定句中，主句的谓语动词一般是非 延续性的。 ※ Until 2004, she lived in Canada. 到2004年为止，她一直住在加拿大。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 6. As the candle burns, it uses the oxygen in the air. 当蜡烛燃烧时，它会利用空气中的氧气。 ◉ as作连词时意为“当……时”，作介词时意为“随着”，作 副词时意为“如同”。 ※ We watched as the sun went down. 我们看着夕阳西沉。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 辨析while，when与as while 表示“在……的时候，在……期间”。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句动作进行的过程中。while从句中的谓语动词必须是延续性动词。 when 表示“当……的时候”。从句中的谓语动词既可用延续性动词，又可用非延续性动词，这些动词既可以表示动作，又可以表示状态。也就是既可以指较短的时间(即某一具体时间)，也可以指一段时间。主句和从句的动作可以同时发生，也可以先后发生。 as 与以上两词同义，常可与when或while通用，但它着重指主句和从句的动作同时发生，不是一前一后。因此，还可意为“一边……一边……”。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 7. When the candle stops burning, it has used up all the oxygen in the air. 当蜡烛停止燃烧时，它已经耗尽了空气中的所有氧气。 ◉ stop doing sth.意为“停止做某事”。 ※ I just couldn’t stop crying. 我哭啊哭啊，怎么也止不住。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 辨析stop doing sth.与 stop to do sth. stop doing sth. 停止正在做的事，doing sth.作宾语 stop to do sth. 停下(正在做的事)去做另一件事，to do sth.作目的状语。 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 8. How far does the water rise? 水会涨多高？ ◉ how far意为“多远”，用于询问两地间的距离，答语也要用 表示距离的句子。 ※ How far can you throw it? 你能扔多远？ 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 辨析how far，how many，how much与how old how far 用于询问两地间的距离，答语也要用表示距离的句子 how many 询问价格以及不可数名词的数量 how much 询问可数名词的数量 how old 询问年龄 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 Practice 一、根据汉语提示完成句子。 1. Please pass me a ________（浅的） dish. 2. I need some ________（火柴） to light the candles. 3. There is one­ fifth ________（氧气） in the air. 4. After finishing all your work, you should ________（检查） it carefully. 5. We have __________（用完） our salt. shallow matches oxygen examine　 used up 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 二、单项选择。 1. Jim ________ all his money to buy the computer. A. fixed up B. used up C. ate up D. got 2. — Have you finished the work? — Not yet, but no matter how hard it is, we’ll keep ________ until we finish it. A. failed B. trying C. tried D. failing √ √ 单击此处编辑母版文本样式 第二级 第三级 第四级 第五级 Sum up 1. Vocabulary: holder, shallow, lighter, match, examine, oxygen 2. Structures and expressions: use up, be made up of 3. Important sentences: （1）As the candle burns, it uses the oxygen in the air. （2）When the candle stops burning, it has used up all the oxygen in the air. （3）Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. Homework 1. Remember the new words and expressions learnt in this lesson. 2. Prepare Lesson 27. $$