1、Lesson 26: KeeptheCandleBurning【学习目标】知识目标：match, light, burn, shallow, candleholder, oxygen;onefifth, use up,bemadeup;① Light the candle. ② As the candle burns, it uses up oxygen in the air.③ There is about one-fifth oxygen in the air, so the water rises and fills about one-fifth o
2、f the jar. 能力目标：能够描述实验步骤和实验现象。情感目标：让学生形成尊重事实、用实验结果说话的态度和科学的世界观。【重点及难点】能够描述实验步骤和实验现象【导学过程】一、自主预习 【预习指导】1. 自学教材第25课单词与词组，你可以听录音跟读，根据音标读，或者请教别人读。做到发音标准，弄清词性和汉语意思。2. 自学教材第68页内容，仔细读课文至少三遍，弄清课文大意。 【自主学习】Ⅰ.（独学）自读课文，了解文中的实验需要什么？要做什么？会发生什么？ ___________________________________________________
3、____________ Ⅱ.翻译下列短语。 (1)a shallow dish with water ______________ (2)put the candleholder in the dish_______________ (3)fill the dish half full of water________________ (4)let the candle burn_________________ (5)将罐子扣在蜡烛上_______________ (6)当蜡烛燃烧时 _______________ (7
4、)用完所有氧气_________________ (8)填充瓶子的大约五分之一_________________ Ⅲ. 在自学过程中，你还有哪些疑惑用横线在文中画出来，并把它写下来，和你的同伴交流。 二、合作探究Task1.读课文，想一想下面的三个问题。 (1)What should you prepare(准备)when you do this experiment? ___________________________________________________(2)In this experiment
5、, where should you put the jar? ___________________________________________________(3) How far does the water in the dish rise at last? ___________________________________________________Task2.再读课文，完成下列的实验步骤。How do we do the experiment? First, _____the candle ____the candleholder
