《Keep the Candle Burning》Look into Science! PPT免费课件
第一部分内容：Think About It!
1.Do you like doing science experiments? Why or why not?
2.What will happen if you put a jar upside down over a burning candle?
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Keep the Candle BurningPPT，第二部分内容：New words
match n. 火柴
holder n. 支撑者
shallow adj. 浅的
lighter n. 打火机
examine v. 检查
oxygen n. 氧气
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Keep the Candle BurningPPT，第三部分内容：Listening Task:
true or false.
( ) 1. The experiment needs a candle and matches.
( ) 2. We need to put water in a bowl.
( ) 3. The experiment proves the air has one fifth of oxygen.
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Keep the Candle BurningPPT，第四部分内容：Language Points
1. Light the candle. 点亮蜡烛。
light此处用作动词，意为“点亮”。还可作名词，意为“光；灯”。作形容词，意为“轻的，浅的，明亮的”。
I want a room with good light. 我要一个采光好的房间。（名词）
My sweater is light blue. 我的毛衣是浅蓝色的。（形容词）
He sat down and lit a cigarette. 他坐下点了一只香烟。（动词）
2. Because about one fifth of the air is made up of oxygen, the water rises and fills about one fifth of the jar. 因为大约五分之一的空气是由氧气组成的，水上升填充了大约广口瓶的五分之一。
1) one fifth意为“五分之一”。英语中表示分数时，分子用基数词，分母用序数词；分子与分母间的连字符可加可不加。若分子大于1，分母则加-s。
Two thirds of the apples are red. 三分之二的苹果是红色的。
2) be made up of意为“由……组成”，of后可接人也可接物，指某物或组织的结构成分。
The club is made up of twelve girls. 这个俱乐部是由12个女孩组成的。
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Keep the Candle BurningPPT，第五部分内容：Practice
根据句意及提示补全单词。
1. Please put the candle in the candle h______.
2. The bowl is too s______ to fill too much water.
3. How many ________ (火柴) are there in the box?
4. You must _______ (检查) your homework after you finish it.
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