Unit 5 Look into Science Lesson 25 Let’s Do an Experiment! 课件

课件18张PPT。Unit 5Look into Science1. To read and understand the dialogue
2. To learn to do the experiment by yourselves
3. To write down a report with some useful words and expressions:
correct, method, force, experiment,
pour, scientific, pressure, conclude,
turn…upside down, pour…out,
scientific method, take…offObjectivesⅠ.Leading-in （情 境 导 入）（友情提示：师友交流各抒己见 ） Lesson 25
Let’s Do an Experiment!In which subject do you often do experiments? [k?'rekt] [k?n'klu??(?)n] [sa??n't?f?k]['meθ?d][?k'sper?m?nt] In Physics or Chemistry classes, we can get correct conclusions by
using scientific methods. Doing
experiment is a scientific method. 1. 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. What does Danny conclude?1. Danny thinks that they should do the experiment outside.2. The force of the air./The air pressure.3. 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.4. Air is stronger than he thought.Read the lesson and answer the questions.（友情提示：师友先独立完成，再互助交流。 ）II. Introduction （实 验 准 备 ）Materials:
right side upupside downjarcardboardwater→→→ ['kɑ?db??d] [d?ɑ?] ['?psa?d]III.Procedure （实 验 过 程 ）What will happen?Look and guess.The water will pour out.
The water will stay in the jar.or Turn the jar upside down.
Cover the top with a piece of cardboard and hold it there.
Take hand off the cardboard.
Fill a jar with water.2134Read the experiment. Put the sentences in the correct order.（友情提示：师友先独立完成，再互助交流。 ）Let’s do the experiment!（友情提示：学生说，老师做。 ）（友情提示：学生说，学生做。 ）The water stays in the jar.Ⅳ.Conclusion （实 验 结 论）1.The force of the air keeps the water in the jar.
2. We discovered that the air pressure helps the cardboard hold the water in the jar.
3. We conclude that air is stronger than we thought.What do you learn from this experiment?Ⅴ. Summary
&Extension（总 结 提 高）The Scientific Method WorksheetName: _______________________________________
Material: _______________________________________
Procedure(过程):
1. Fill a jar with water.
2. Cover the top with a piece of cardboard and hold it there.
3.Turn the jar upside down.
4.Take hand off the cardboard.
Results：
Conclusions:
_______________________________________The force of the air / The air pressurea jar, a piece of cardboard, some waterThe water stays in the jar.The force of the air keeps the water in the jar.Experiment Report
Today we do an experiment about...
In this experiment, we use...
At first,
Second,
Then,
At last,
At the end, we find...
So, we conclude that...