Unit 5 Lesson 26 Keep the Candle Burning 教学设计

UNIT 5 Look into Science
Lesson 26: Keep the Candle Burning
首先，让学生口头描述上节课所学实验的过程，并由此导入新课。接着，通过讨论本节课所学实验需要的物品教学生词，并跟读，自读短语来巩固新学词汇。然后，把课文分成三部分，通过听、读后回答问题分别学习三部分内容；紧接着通读全文完成Let’s Do It! No.1的练习，通过读后找短语并翻译巩固所学词汇；并让学生根据图示复述课文。最后，处理剩余的练习及Project。整个教学，重在读后复述实验过程，培养学生的综合语言运用能力。
教学目标
通过本课节的教学，学生达成以下目标：
1. 知识目标
掌握单词：match
接触单词：holder, shallow, lighter, examine, oxygen
短语：use up, be made up of
2. 能力目标
(1)掌握本课所学的单词和英语表达；
(2)能用英语描述实验步骤及所看到的实验现象。
3. 情感目标
相信科学，热爱科学，运用科学，服务人类。
重点难点
1. 重点：掌握本节课所学的单词和英语表达。
2. 难点：能用英语描述实验步骤及所看到的实验现象。
教学准备
PPT 课件；生词图片；课文音频。
授课时数
1课时
教学过程
Step 1 Revision
Get the class to describe the experiment in Lesson 25 according to the pictures.
Step 2 Presentation
1. Show the class some pictures, and teach the new words holder, shallow, lighter, match by talking about the objects used in the experiment.
(1)Teacher says: Do you like doing science experiment Why or why not Today, we’ll do another science experiment. What do we need Look！This is a candle. And what’s this It’s a candle holder. And we need a big glass jar.
a big glass jar
(2) Teacher says: Look at the dish. Is it deep No. It’s shallow. We also need some water.
a shallow dish 一个浅盘子 some water
/ l / adj. 浅的
(3) Teacher says: We also need two things. What are they The first one is a lighter, and the second one is a box of matches.
a lighter 一个打火机 matches
/ la t / n.打火机；点火器 /m t / n. 火柴 v.相称；相配
2. Read the new words following the recording, and read the expressions alone.
Then remember them.
holder n. 支托物；持有者
shallow adj. 浅的
lighter n. 打火机；点火器
match n. 火柴
examine/ ɡ z m n / v. 检查
oxygen / ks d n/ n. 氧气
use up 用光；用完
be made up of... 由……组成
Step 3 Listening and reading
Part 1
Get the class to listen and answer the question.
How many things can we need
Answers: Six.
Part 2
1. Get the class to listen and put the sentence in the right order.
□Light the candle.
□Examine the water in the jar. What can you see
□Carefully put the jar over the candle until the top of the jar rests on the dish .
□Put the candle in the candle holder.
□Fill the dish half full with water.
□Let the candle burn for two or three minutes.
□Put the candle holder on the dish.
Answers: 4 7 6 1 3 5 2
2. Get the class to read and answer the questions.
(1) How much water should we fill the dish
(2) How long should we let the candle burn
(3) Where should we put the jar
Answers: (1) Half full of the dish.
(2) Two or three minutes.
(3) Put it over the candle until the top of the jar rests on the dish.
Part 3
1. Get the class to listen and answer the question.
What is happening
Answer: The water inside the jar rises.
2. Get the class to read and answer the questions.
(1) Why does the water rise
(2) How far does the water rise
Answers: (1) When the candle stops burning, it has used up all the oxygen in the air. So the air pressure outside the jar is stronger than that in the jar, and the force of the air outside makes the water inside rise.
(2) One fifth of the jar.
Step 4 Reading and filling
Get the class to read the lesson and fill in the blanks. (Let’s Do It! No.1)
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 jar. When the candle stops_________, it has used up all the oxygen in the jar. The water inside the jar _________ and fills about ________ of the jar. This is because about one fifth of the jar is made up of oxygen.
Answers: match, Let, uses, burning, rises, one fifth
Step 5 Reading, finding and translating
fill…with...用……装满……
on the dish 在盘子里
put… over...把……罩在……上面
the top of ……顶部
stop doing sth. 停止做某事
use up 用光，用完
one fifth of… ……的五分之一
be made up of… 由……组成
Step 6 Reading and retelling
Get the class to read the passage and then retell it according to the pictures.
Step 7 Exercises
Circle the correct words to complete the sentences.(Let’s Do It! No.2)
1. Don’t ( use up / push up ) all of the ink. Leave some for me.
2. The medicine 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.
Answers: 1. use up 2. is made up of 3.with 4. until 5. strong enough
Step 8 Project
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.
Step 9 Summary
Sum up what we’ve learnt in this period with the class.
1.本课所学的词汇
match holder shallow
lighter examine oxygen
use up be made up of
2. 如何描述实验步骤
Step 10 Homework
1. Remember the new words and expressions learnt in this lesson.
2. Describe the experiment to your friends.
3. Preview Lesson 27.
当堂达标
Ⅰ.根据句意及提示写出单词
1. The water here is s_________, not deep.
2. Our teacher is e___________ our homework to make sure there are no mistakes.
3. Look! The boy is playing with some __________ (火柴).
4. There is little __________ (氧气) at the top of the mountains.
5. Mr. Black sat down and lit a candle with a l____________.
6. She kept me ___________(hold) the jar with my hand.
Ⅱ. 单项选择
1. _______ of the students in our class ______ going to summer camp in Beijing next week.
A. Two fifths, is B. Second fifths, are
C. Second fifths, is D. Two fifths, are
2. If success is a gate, the road towards it must _________difficulties.
A. be made of B. be made from
C. be made up of D. be made by
3. We have ______ all the water. Please give us some more.
A. turned up B. used up
C. eaten up D. set up
4. Please fill the jar ______ oil.
A. of B. with C. into D. over
5. We should stop _______ disposable chopsticks (一次性筷子) and remember to
protect the forest.
A. use B. to use C. used D. using
答案: Ⅰ.1. shallow　2. examining　3. matches 　4. oxygen 5. lighter
6. holding
Ⅱ. 1—5 DCBBD
板书设计
UNIT 5 Look into Science Lesson 26: Keep the Candle Burning
match, holder, shallow, lighter, examine, oxygen 1. 短语： use up be made up of 2. 描述实验过程