franklin’s famous kite experiment[最新]

Franklins Famous Kite Experiment,Franklins Famous Kite Experiment,A brief introduction of Franklin,Benjamin Franklin (17061790),1.In 1752 scientists already knew what electricity was.,2.Franklin was helped by a friend to do the experiment.,3.Franklin made the kite of silk because wet silk does not conduct electricity,4.A condenser was used in the experiment to store electricity.,5.The key tied to the string was put into the door to stop the kite from flying away.,True or False:,F,F,T,F,T,Questions,Why did Franklin do this experiment? What happened during the experiment?Whats the results of the experiment?What do we need to do the experiment?How can you make a kite ?Why is it better to make the kite of silk than of paper ? What are the next three steps after you make a kite ?What should be paid attention to when it was being done?,How can we make a kite? _the _of the kite by making a small cross of two pieces of_ _. The pieces should be just long enough to _the corners of the handkerchief. _ the corners of the handkerchief _the points of the cross. _a tail _the frame and _a long string_the cross so that you can _the kite.,Build,frame,light wood,reach,Tie,to,Add,to,tie,to,control,paper,wooden sticks,string,kite,The next three steps are very important. First, _a very sharp piece of _,pointing a foot or more. Second,_a key to the end of the long string. Third,_a silk ribbon _the string, just abovethe key. This ribbon which must not_ _,will_you _the electricity.,fix,metal,fasten,tie,to,get wet,protect,from,string,sharp metal,key,kite,wooden sticks,silk ribbon,Condenser,Instructions,A small cross of two pieces of light wood. Tie the corners of a handkerchief to the points of the cross . Add a tail to the frame . Tie a long string to the cross. Fix a sharp piece of metal to the top of the longer stick of the cross. Fasten a key to the end of the long string.Tie a silk ribbon to the string.Connect a condenser to the end of the string.,The making process (过程),Introduction of the experiment.,The process of the experiment,Tips of doing the experiment,Para1,Para2-3,Para4-6,Main idea,Discussion,Do you think Franklins experiment dangerous ? Why?What can you learn from Franklin?,Kite experiment,Benjamin Franklin,Show that lightening and electricity are the same,A thunderstorm with lightening,The electricity stored in the condenser can be used to do other experiments,Homework: Experiment Report,Two pieces of