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(共31张PPT)
Unit 6 Looking into science
第 1 课 时
Lesson 1 Let’s do an experiment!
单词: upside，shall，raincoat，tightly，conclude
短语: upside down，pour out
句型：①That’s called the scientific method.
②I conclude that air is stronger than I thought.
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掌握本课时的重点单词、短语及句型；能够使用关键词汇（例如，气压、纸板、罐子、结论）来描述实验及其结果；通过动手实验理解气压的概念，培养科学思维。
2
Learning Goals
课 堂 学 习
Vocabulary
n. 广口瓶；罐子
n. 硬纸板
n. 正面
aux.（在疑问句中同I和we连用，
表示提出或征求意见）；将要
jar /d ɑ (r)/
cardboard / kɑ db d/
upside / psa d/
shall / l/
Vocabulary
n. 雨衣
adv. 紧紧地；牢固地
v. 得出结论；结束
raincoat / re nk t/
tightly / ta tli/
conclude /k n klu d/
cover... with... 用某物遮盖某物
upside down 倒置
pour out 倾倒
find out 查明；弄清
Structures and Expressions
Lead-in
Let’s guess “What am I”
I am invisible, but I can hold up water. I am related to air. I push on everything around you.
air pressure
I am invisible.
I am everywhere.
People will die without me.
People breathe with me.
air
What do you already know about air
Can air do “strong” things
invisible
oxygen
colorless
light
Can air do “strong” things
blow leaves
hold up a kite
fill a balloon
If I hold a jar filled with water and turn it upside down.
What will happen
Read the conversation and answer the following questions.
1
While-listening
1
Who are the characters in the dialogue
2
What is the main idea of the passage
3
What is the experiment What is the result
Danny, Jenny and Brian are in the lab.
Brian: Let's do an experiment. I fill a jar with water. I cover the top with a piece of cardboard and hold it there. Then I turn the jar upside down and take my hand off the cardboard. Can you guess what will happen
Danny: I think the floor will get wet. We should do this experiment outside, Brian.
Jenny: I think the cardboard will hold the water.
Danny: I don't think so.
Jenny: You think the water will pour out, Danny. I think the water will stay in the jar. Shall we do the experiment and find out
Brian: Good idea, Jenny. That's called the scientific method.
Jenny: Brian can do the experiment over your head and I know you won't get wet.
Danny: Well, let's try it!
Brian: Are you ready, Danny
Danny: No! Wait! (He puts on a raincoat and sits down.) Now I think I'm ready.
Jenny: Brian, take your hand off the cardboard.
Danny: No! (Danny closes his eyes tightly, and Brian takes his hand off the cardboard. The water stays in the jar.)
Danny: How is that possible
Brian: The force of the air keeps the water in the jar. It is strong enough to hold the water.
Danny: Wow!
Brian: So what have we discovered
Jenny: We have discovered that the air pressure pushes the cardboard onto the jar.
Brian: Right. What can you conclude, Danny
Danny: I conclude that air is stronger than I thought.
1
Who are the characters in the dialogue
2
What is the main idea of the passage
3
What is the experiment What is the result
Danny, Jenny and Brian.
It introduces an experiment about air pressure.
Experiment:
I fill a jar with water. I cover the top with a piece of cardboard and hold it there. Then I turn the jar upside down and take my hand off the cardboard.
Result:
The water stays in the jar. The force of the air keeps the water in the jar.
Listen to the conversation and answer the questions.
Listening
2
A What keeps the water in the jar
B Why does Danny put on his raincoat
C What does Danny conclude
A What keeps the water in the jar
B Why does Danny put on his raincoat
C What does Danny conclude
The force of the air (air pressure) keeps the water in the jar.
Because he thinks the water will spill out and he doesn't want to get wet.
He concludes that air is stronger than he thought.
Listen to the experiment and put the sentences in the correct order.
3
□Put a piece of cardboard over the jar.
□The jar of water is upside down, but the water stays in the jar. This is because air pressure pushes the cardboard onto the jar.
□Fill the glass jar with water.
□Turn the glass jar over quickly. Hold your hand on the cardboard for a few seconds.
□Remove your hand from underneath the jar. What happens
□There is more air pressure outside the jar than inside it.
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5
1
3
4
6
4
Retell the procedures of the experiment.
Cover the top with a piece of cardboard.
Take the hand off the cardboard.
Fill the jar with water.
Turn the jar upside down and hold it there.
The air pressure helps the cardboard hold the water in the jar.
Work in groups and share an experiment you have done and introduce the name, materials, steps, guesses, result, and principle, and give a simple evaluation.
5
Post-Listening
What was the experiment
What materials did you need
What did you think would happen
What were the steps
What was the result
What’s the science behind it
I have done an egg floating experiment at home. First, I poured some water into a glass. I put an egg in it, and the egg sank to the bottom. Next, I added lots of salt into the water and stirred it well. Slowly, the egg began to rise and float in the middle of the glass. Salt makes the water denser. Denser water gives more upward force to hold the egg up. I found this experiment quite amazing.
Listen to the song and sing along.
6
1. Let's do an experiment. 让我们做个实验吧。
experiment n. 试验，实验 v.做实验
do/make/carry out an experiment做实验
experiment on/with sth.用…… 做实验；在…… 身上做实验
例句：It's wrong to experiment on/with the animals.
在动物身上做实验是错误的。
Language points
2. Then I turn the jar upside down and take my hand off the cardboard. 然后我将广口瓶倒置并将我的手从纸板上拿开。
① turn...upside down(=turn over) 把……翻转；倒过来
upside down正面朝下 right side up 正面朝上
②take …off… 把……从……拿开
take off 摘下; 脱下; (飞机等)起飞
take up 开始从事；占据 (时间 / 空间)
take down 记下；写下 take out 取出；拿出
take care 小心，当心 take care of 照顾；照料
take place 发生 take part in 参加 (活动)
take turns 轮流
3. You think the water will pour out, Danny.
你认为水会流出来，丹尼。
pour out 涌出；倒出；使流出
pour …into…把……倒进……
例句： The tea poured out.
茶水溢了出来。
例句：Pour the milk into the bottle.
把牛奶倒进瓶子里。
4. Shall we do the experiment and find out
我们来做这个实验一探究竟好吗？
shall aux.将要
①Shall we… 我们…… 好吗？
（用于第一人称 we, 提建议，征求对方意见）
注意：只能用 Shall we，不能说 Shall you
②Shall I … 我要…… 吗？（主动提出帮忙）
例句： Shall I open the window 要我打开窗户吗？
③正式承诺、规定
例句：You shall follow the rule.你应当遵守规则。
5. Danny closes his eyes tightly, and Brian takes his hand off the cardboard. 丹尼紧紧闭上双眼，布莱恩松开手离开纸板。
tightly adv. 紧紧地；牢固地
tight adj. 紧的
例句:She closed the window tightly.
她把窗户关得严严实实。
6. The force of the air keeps the water in the jar.
空气的力量让水待在广口瓶里。
force n. 力；力量 v. 迫使；强迫
force sb. to do sth. 迫使某人做某事
例句: It’s impolite to force others to do something unpleasant.
迫使他人做令人不高兴的事情是不礼貌的。
7. I conclude that air is stronger than I thought.
我总结空气要比我想象的更强大。
conclude v.总结，得出结论
conclusion n.总结
make/draw a conclusion 做总结
come to a conclusion 得出结论
in conclusion 总之，最后
例句：We can conclude that he is right.
我们可以得出结论他是对的。
I.用括号内所给词语的适当形式填空
Practice
1. Let's do an __________ (experiment) to test our idea.
2. After observing the results, we can ________ (conclude) that air pressure is strong.
3. He held the cardboard ________ (tight) against the jar.
4. Turn the jar ___________ (upside down).
5. — _______ we go to the park tomorrow —That sounds great.
experiment
conclude
tightly
upside down
Shall
II.英译汉
1.We will do an experiment to test the effect of air pressure.
2.The thin wooden shelf can hardly hold up all these books.
3.Is the little boy strong enough to carry this schoolbag
4.What do you conclude from the result of the test
我们将做一个实验来测试气压的作用。
这个薄薄的木架子几乎托不住所有这些书。
这个小男孩力气够大，能背得动这个书包吗？
从测试结果中你能得出什么结论？
1. Try the jar experiment at home with your parents! Remember to handle water and glass carefully to avoid spills or accidents.
2. Write a 50-word paragraph describing your experiment. Include at least 3 new words to show what you've learned.
Homework

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