澄海中学：许楚茹 UNIT 16 UNIT 16 SCIENTISTS AT WORK Alexander Bell.

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Presentation transcript:

澄海中学：许楚茹 UNIT 16 UNIT 16 SCIENTISTS AT WORK

Alexander Bell

Match the scientists with their contributions. Thomas Edison Charles Darwin Madame Curie Newton Einstein John Snow Gravity; Newton Laws Radium; Radioactivity Evolution Radio; Electric bulb spread of disease Energy equivalency; Relativity

Benjamin Franklin

FRANKLIN’S FAMOUS KITE EXPERIMENT

Before reading ( A or D ) Topic After reading ( T or F ) In 1752 scientists already knew what electricity is. Franklin was helped by a friend to do the experiment. Franklin made the kite of silk because wet silk does not conduct electricity. A condenser was used in the experiment to store electricity. The key tied to the string was put into the door to stop the kite from flying away. T F F T F

Franklin’s famous kite experiment Part 1(para1): Introduction of Franklin’s experiment. Question: What is the main idea of this paragraph?

Part2(para2-3): The process of the experiment. 1.Arrange the following in the correct order: a.Collected and stored electricity in the condenser. b.Felt an electric shock. c.Built a kite d.Went to a shed in the fields. e.Flied the kite. c d eba 2.What conclusion can we make from this experiment ?

Franklin’s famous kite experiment 1.The materials needed for the experiment: Part 3: Kite experiment A kite A key Bad weather condenser Two pieces of light wood A handkerchief A tail A long string A piece of metal A silk ribbon A shed

2.Choose the right things that we should do( ) A. Fix a piece of metal to the long string. B. Fasten a key to the end of the long string. C. Tie a silk ribbon to the string. D. Fly the kite after a thunderstorm occurs. E. Stand in the open air. F. Keep the silk ribbon dry. G. Take care that the string does not touch the house. Part 3(para4-6): The tips of doing the experiment BCF G

Question : Do you think Franklin’s experiment was dangerous? Explain.

Fill in the form of science report : Title Experimenter ’s name Purpose Materials Procedures Results conclusion Kite Experiment Benjamin Franklin To show that lightning and electricity are the same some wooden stick, a handkerchief, rope, a piece of mental, a silk ribbon, a key, a condenser,a small shed, a thunderstorm with lightening. 1.make a silk kite;2.fix a piece of metal; 3.fasten a key;4.tie a silk ribbon; 5.fly the kite; 6.collect and store the electricity. successful It proves that lightning and electricity are the same

Discuss in groups : describe a simple experiment.