Quiz for Unit 3

that your product really is different from everyone else’s. 9. There are a large number of patent examiners, too, whose only job is to examine whether your claim is ____________ or not.

Class ____________

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Number

_____________ Name

________________

10. Bell’s interest in deaf education led him ____________ (invent) the microphone. 11. The original telegraph sent a

message ____________

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distances using Morse code.

12. If sound waves

could be reproduced in a moving electrical

____________, they could be sent along a wire.

13.The day is coming _____________ telegraph wires will

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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, but I couldn’t __________

_________. Maybe your phone was

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