冀教版九年级上册英语《Keep the Candle Burning》Look into Science! PPT说课.pptxVIP

Keep the Candle Burning Lesson 26 Look into Science Unit 5 同学们，上一课学习的单词你们都掌握了吗？现在大家来检验一下，点击下面的音频开始听写吧！ Do you like doing science experiments?Why or why not? THINK ABOUT IT·Do you like doing science experiments? Why or why not?·What will happen if you put a jar upside down over a burning candle? 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! Science is so interesting! I’m sure you’ll like this experiment!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?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?10 keep /ki?p/ v.保持 eg：You should keep the room clean. 你应该保持房间清洁。讲解来自《点拨》知识点1 keep＋宾语＋形容词，意为“使……保持某种状态”。 You can’t sneeze and keep your eyes open at the same time.你不能在打喷嚏的同时让你的眼睛睁着。 keep sb. from doing sth. 阻止某人做某事，相当于“stop sb.from doing sth.”。 We should keep the children from swimming alone in the sea.我们应该阻止孩子们单独在海里游泳。 keep (on) doing sth. 继续，重复做某事。 Keep smiling! 保持微笑！ 讲解来自《点拨》考向keep的用法： match/m?t?/ n.火柴，比赛 v.相称，相配 讲解来自《点拨》知识点2eg：We need to light a match.