Quiz for Unit 3

Class ____________ Number

_____________ Name

________________

10. Bell’s interest in deaf education led him ____________ (invent)

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the microphone. 11. The original telegraph sent a

message ____________ distances using Morse code.

12. If sound waves

could be reproduced in a moving electrical

____________, they could be sent along

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a wire.

13.The day is coming _____________ telegraph wires will be laid on to houses just like water or gas—— and friends will talk to each other without leaving home.

14. I called you up

many times yesterday,

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but I couldn’t __________

_________. Maybe your phone was ________ ________ _________. 15. Today we

_____________ ______________ Leonardo da Vinci as one of the greatest painter, but if he had

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