Unit 5 Lesson 26 Keep the Candle Burning 课件(共24张PPT，内嵌音视频) 2023-2024学年冀教版英语九年级全一册

(共24张PPT)
Unit 5
Lesson 26
Keep the Candle Burning
新课导入
a candle
a big glass jar
What do we need to do the experiment
a candle holder
a shallow dish with water
matches
1.掌握本课新单词: science, experiment, fill, prove, scientific, method.
掌握本课短语: do an experiment, fill…with, cover…with, turn…upside down, be (not) sure…
2.增强对科学实验的兴趣。
预习检测
1.They waited for their father ______ 9:00 last night.
A. for B. on C. until D. in
2.I don't like the coffee ______ milk.
A. has B. have C. by D. with
C
D
3.______ of the students in our school are boys.
A. Two three B. Second three C. Two thirds D. Two third
4.Britain ______ four main parts.
A. is made up of B. is made of C. is made from D. is made by
5.We______all the money by buying a house.
A.use up B.use out C.make up D.make out
C
A
A
知识梳理
1. Light the candle.
light 及物动词，点燃，照亮
e.g. It's so cold. Let's light the fire.
拓展 light的其他用法：
①可数名词，电灯
e.g. Don't forget to turn off the light when you leave.
②形容词，轻的
反义词：heavy(重的)
2. When the candle stops burning, it has used up all the oxygen in the air.
use up 用光；用尽
同义短语：run out of
e. g. I need some water. Don't use it up.
真题再现：
He told the interviewer that he had run out of money to buy old bikes.
A. put away B. turned off C. taken out D. used up
3. Becase about one fifth of the air is made up of oxygen, the water
rises and fills about one fifth of the jar.
①one fifth 五分之一
分数的表达 ：分子基，分母序。分子大于一，分母加s。
小试牛刀：八分之一________________ 六分之五_________________
②be made of 由......组成/构成
e.g. Water is made up of hydrogen and oxygen.
one eighth
five sixths
蜡烛燃烧实验
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
What do you do
l. 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
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
1 Read the lesson and fill in the blanks.
Let
uses
burning
rises
one fifth
Let's Do It!
Let's Do It!
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.
2 Circle the correct words to complete the sentences.
SCIENCE THAT'S INTERESTING!
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.
活动小结
这个实验需要用到的器材有：
_______________________________________________
实验结果：
随着蜡烛的燃烧，玻璃杯内的氧气被耗尽，玻璃杯内的水会________，上升的高度大约是玻璃杯的______,
因为氧气占空气的______。
蜡烛，(烛台)，玻璃杯，浅口盘，打火机或者火柴
上升
1/5
1/5
分数的表达
Get to know the fractions through watching this video.
Ⅰ.Write down the following fractions then read them.
1/8 _______________
1/100 _______________
3/7 _______________
2 1/2 _______________
one-eighth
one-hundredth
three-sevenths
two and a half
Ⅱ.Fill the following blanks with “is” or “are”.
About one-fifth of the air _______ oxygen.
Two-thirds of the flowers _______ red.
is
are
活动小结
分数由_______及_______两部分构成。用英语表达时，分子_______用形式，分母用_______形式。若分子为1时，则分母的序数词为________形式；若分子大于1时，则分母的序数词用_______形式。
分子
分母
基数词
序数词
单数
复数
当堂检测
一、用所给单词的正确形式填空。
1. Please cut the apple into _________ (half).
2. He ____________ (light) a candle and the room was bright.
3. ________ (two), ask the students to guess what will happen.
4. He kept the candle _________ (burn) for two hours.
halves
lighted / lit
Second
burning
Unit 5
Lesson 26
1.掌握本课新单词：jar shallow oxygen candle hoider burning.
掌握本课短语：use up , put on,in front of
2.掌握如何做成实验的正确用语
3.能用英语描述各个仪器的用途，以及实验过程