1、Lesson 30 Keep the Candle Burning!,You can do it!,some new words and phrases,1. use up 用盡，用光 use up the oxygen 用光氧氣 It has used up all the oxygen in the air. 它已用光了空氣中所有的氧氣。 eat up drink up,2.one-fifth 五分之一 one-fifth oxygen 五分之一的氧氣 one-fifth of the jar 罐子的五分之一 one-second one-third,some words and phra

2、ses,Read them loudly-You can do it!,3.burn v. 燃燒 stop burning 停止燃燒 make the candle burn 使蠟燭燃燒,4. light v. 點(diǎn)燃 light the candle 點(diǎn)燃蠟燭,some words and phrases,Lets do it! Come on !,steps of the experiment,Step 1. Put the candle in the candleholder.,Step 2. Put the candleholder in the dish,Step 3. Fill th

3、e dish half full of water.,steps,Steps:,Step 5. Let the candle burn for two or three minutes,Step 6. Carefully put jar over the candle until the top of the jar rests on the dish,Step 4. Light the candle.,Lets practice- Come on !,Who can read them?,Lets practice- Come on !,Who can read them?,Who can

4、do the experiment?,Lets practice- Come on !,Who can read them? Who can do the experiment? Who can make a dialogue with me?,Speak out- you are the best!,Whats your observation?,Whats the reason in your opinion?,Todays homework-its easy!,No. One Go over the text . If you have any questions ,please ask

5、 me next class. No. Two With a group of classmates, practice the experiment. Do it again and again. As you do it, describe it in English.,退出,Thank you for listening!,Goodbye!,4.one-fifth “五分之一”,one-fifth oxygen,one-fifth of the jar,one-second 二分之一 one-third 三分之一,It has used up all the oxygen in the air