Unit 5 Lesson 25 Let's Do an Experiment课件＋音频(共21张PPT)冀教版九年级英语全册

(共21张PPT)
Unit 5
Look into Science
Lesson 25
Let’s Do an Experiment!
experiment
jar
upside
pour
correct
scientific
method
raincoat
force
pressure
conclude
n. 实验；试验
n. 广口瓶；罐子
n. 上部；上边
v. 倒出；倾倒
adj. 正确的；恰当的
adj. 科学的
n. 方法；办法
n. 雨衣
n. 力量 v. 迫使；强迫
n. 压力，压强；挤压
v. 得出结论;断定;推断出
experiment
jar
upside
pour
correct
scientific
method
raincoat
force
pressure
conclude
n. 实验；试验
n. 广口瓶；罐子
n. 上部；上边
v. 倒出；倾倒
adj. 正确的；恰当的
adj. 科学的
n. 方法；办法
n. 雨衣
n. 力量 v. 迫使；强迫
n. 压力，压强；挤压
v. 得出结论;断定;推断出
1.做实验
让我们做个实验吧。
2. 颠倒着，倒转着，乱七八糟
把……翻过来,倒过来
正面朝上
把……从……拿开
然后我把广口瓶向下翻转过来，并且把手从纸板处拿走。
3. 涌出，倾诉
你认为水会溢出来。
为某人倒某物
4.正确的，恰当的adj. →adv.
让我们检验一下哪个理论正确。
5.科学的adj. →科学家n.→科学n.
科学方法
6. ……的力量
空气的力量使水保存在广口瓶里。
被迫做某事
强迫某人做某事
7. 气压
8.得出结论，推断v. →n. 结论
1.do/make/ carry out an experiment
Let’s do/make/ carry out an experiment.
2. upside down
turn … upside down
right side up
take… off… (take off 脱掉，飞机起飞)
Then I turn the jar upside down and take my hand off the cardboard.
3. pour out
You think the water will pour out.
pour sth for sb= pour sb sth
4. correct →correctly
Let’s test which theory is correct.
5. scientific →scientist →science
scientific method
6. the force of
The force of the air keeps the water in the jar.
be forced to do sth/ be made to do sth
force sb to do sth= force sb into doing sth
7. the air pressure
8. conclude →conclusion
science
scientist
instrument
laboratory
universe
doing
experiment
physical
phenomenon
What words can you think of that related to science
1. To listen and understand the experiment
2. To learn to explain the experiment
3. To learn some useful words and expressions
Objectives
Words: correct method force experiment
pour scientific pressure conclude
Phrases: turn…upside down pour…out
scientific method take…off
Patterns: That’s called the scientific method.
Read the lesson and answer the questions.
Where does Danny think they should do the experiment
2. What keeps the water in the jar
3. Is Jenny sure of her theory How do you know
4. Why does Danny put on his raincoat
5. What does Danny conclude
Danny thinks that they should do the experiment outside.
The force of the air./The air pressure.
Yes, she is. She is so sure of her theory that Brian can do the experiment over Danny’s head and he won’t get wet.
Because he thinks he will get wet.
Air is stronger than he thought.
Read the experiment. Put the sentences in the correct order.
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 outside the jar than inside, so there is more air pressure outside than inside.
2
5
1
3
4
6
Language points
1.我装满了一瓶水。
2. 我用一张纸板盖在瓶口处并放在那儿。
3.你们猜会发生什么？
4. 我认为纸板会托住水。
我认为地板会变湿。
5.那怎么可能呢？
6.它有足够的力量托住水。
7.那么我们发现了什么？
我们发现气压有助于纸板托住广口瓶里的水。
帮助某人做某事
在某方面帮助某人
在某人的帮助之下
忍不住，情不自禁做某事
随便吃……
帮助某人解决困难，摆脱困境
8.我推断出空气比我想象的要强壮的多。
1.I filled the jar with water.
2. I cover the top with a piece of cardboard and hold it there.
3. Can you guess what will happen
4. I think the cardboard will hold the water.
I think the floor will get wet.
5. How is that possible
6. It is strong enough to hold the water.
7. So what have we discovered
We have discovered that the air pressure helps the cardboard hold the water in the jar.
help sb (to) do sth
help sb with sth
with one’s help= with the help of sb
can’t help doing sth
help oneself to sth
help sb out
8. I conclude that the air is stronger than I thought.
接龙
幻灯片上单词、中文或图片出现时，同学应迅速反映出其对应的中英文。
每人一词，按行/列依次接龙，3秒内说不出，此行/列同学即失去此答题机会，下一行/列同学接续。
upside
正确的，恰当的
方法；办法
force
scientific
得出结论；断定；
推断出
Try to do the experiment in this lesson yourself.
(Work in groups of three and record the process using the scientific method.)
Task tips: What happens when you use less water, more water, wet cardboard, or different kinds and sizes of jars
The Scientific Method Worksheet
Question: What is the problem you want to
explore Ask a clear, specific and testable
question.
_________________________________________
Theory: Make a prediction or your best guess
about the solution to or result of your question.
_________________________________________
Procedure: Plan the materials you will need and
the steps you will take to test your theory.
Materials: (list)
Steps:
_________________ 2. ___________________
3._________________ 4.____________________
Results/ Conclusions: Record the results of your
experiment. Was your theory correct
_________________________________________
Do some practice
Ⅰ. 根据汉语提示完成句子。
1. The _______ answer is apparent.
2. My _______ (方法)for studying English
differs from yours completely.
3. The band is still an innovative ______ (力量) in music.
4. Maybe they feel too much ________ (压力) to do well on their tests.
5. What can we ________ (得出结论)
from the conversation
correct
method
force
pressure
conclude
1. The 　(正确的) answers can be found on the next page.
2. Tony wants to do an 　　　(实验) to test his theory.
3. You can’t 　　　(迫使) others to do what they hate.
4. I think this is the best 　　　(方法) to solve the problem.
5. Betty, you’d better take your 　　　(雨衣). The weatherman said it would rain this afternoon.
correct
2. experiment
3. force
4. method
5. raincoat
be sure of scientific method turn over take… off fill … with…
6. She 　　　 the tape, and saw a beautiful picture on the other side.
7. Please 　　 your coat 　　　 and hang it on the wall.
8. Can you help me 　　　the bottle 　　the apple juice
9. You should use 　　　　to lose weight.
10. She 　　　 passing the exam, because she has prepared for it for more than a month.
6. turned over
7. take; off
8. fill; with
9. scientific methods
10. is sure of
11. 首先, 捡起塑料袋并把它的开口朝下。
First, pick up the plastic bag and 　　　　 it 　　　　 　　　　.
12. 这件衬衣不够大。
This shirt isn’t 　　　　 　　　　.
13. 我不知道哪条是回宾馆的路。
I don’t know 　　 　　 　　 　　　 back to the hotel.
14. 这些天天气变得越来越冷。
It becomes 　　　　 　　　　 　　　　 these days.
15. 人们叫他米奇，因为他的名字叫米切尔。
He 　　 　　Mitch, because his name is Mitchell.
11. turn; upside down
12. big enough
13. which is the way
14. colder and colder
15. is called
Homework
Preview the words and expressions in Lesson 26.
Try one experiment at home and use the scientific method to record the process and report the results. You may also choose to take photos or draw pictures of the experiment.