Unit16 Scientists at work Period2 Reading (1)Q: Do you know the names of some famous scientists? What are they famous for?He discovered why all things fall down to earth.GravityCharles Darwin (1809-1882)Dead-leaf mimic katydidEvolutionPoRaRadioactivityMadam Curie (1867-1934)Benjamin Franklin 1706 ~~~ 1790statesman, inventor printer, diplomat philosopher writer, scientist1.When did Benjamin Franklin do his experiment?2.What was the purpose of this experiment?3.What was needed in this experiment?In June 1752To show that lightning and electricity were the same.Skimming A kite experimentA kiteA keySome really bad weatherA condenser to store electricityA kiteSome wooden sticksA very sharp piece of metalA ball of stringA piece of silkA silk ribbon4.What was the result of the experiment? Did it succeed?5.Why is it better to make the kite of silk better than of paper?6.What is the use of the silk ribbon?The electricity stored in the condenser can be used to do other experiments, which proved that lightning and electricity were the same.It will not tear so soon in weather with rain an strong winds.It will protect you from the electricity.How to make a kite1. Build the frame of the kite by making a small cross of two pieces of light wood.2. Tie the corners of the handkerchief to the points of the cross.3. Add a tail to the frame and tie a long string to the cross. What to do then Fix a very sharp piece of metal, pointing a foot or more above the frame, 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, just above the key.TietoAddtoFixtoFastentoRead the following statements and decide if they are T or F. In 1752 scientists...
