冀教版初中英语九年级全一册第5单元Lesson 25 Let’s Do an Experiment!(共19张PPT).ppt

1、Unit 51.To read and understand the dialogue2.To learn to do the experiment by yourselves3.To write down a report with some useful words and expressions:correct,method,force,experiment,pour,scientific,pressure,conclude,turnupside down,pourout,scientific method,takeoffObjectives.Leading-in（情 境 导 入）（友情

2、提示：师友交流各抒己见）Lesson 25 Lets Do an Experiment!In which subject do you often do experiments?krektknklu()nsantfkmedkspermnt In Physics or Chemistry classes,we can get co rrect c o n c l u s i o n s b y using scientific methods.Doing experiment is a scientific method.1.Where does Danny think they should

3、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 o

4、verDannys head and he wont 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 downjarcardboardwaterkdbd d psadIII.Procedure（实 验 过 程）What will happen?Look and guess.The water will pour out.The w

5、ater 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。）Lets do the experiment!（友情提示：学生说，老师做。）（友情提示：学生说，学生做。）.

6、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?.Summary&Extension（总 结 提 高）The Scientific Method Workshee

7、tName:_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 ReportToday 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.What will happen when you use less water,more water,wet cardboard,or different kinds and sizes of jars.保定市列电中学刘倩