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Unit-V
Science &
31 Technology
Inventions
Inventors are individuals who invent, design, innovate, or discover new methods of doing thing or
invent technologies that enhance the quality of our lifestyle.
Match each picture with a description below and write the name where they correspond.
Vaccum Cleaner X-Ray Machine Traffic Signal
Contact Lenses Sunglasses Bicycle
1. An ______________ shoots an invisible beam of ray through parts of our bodies to take
pictures of bones, teeth, tissues, and organs. It was accidentally invented in Germany.
2. The first ______________ were developed by a European doctor. They were thick and not
very comfortable.
3. The first ______________ was invented in Chicago in 1868 and was called the ‘‘Whirlwind’’.
It was difficult to use.
4. The ______________ was invented by a German inventor in 1817. The first one was made of
wood, and it didn’t have any pedals.
5. The first electric ______________ was built in 1914 in the United States. It was a long pole
with red and green signs on it. The red signs said “stop” and the green signs said “go”.
6. The first ______________ were designed in China and were worn by judges to conceal their
facial expressions in court.
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