Inventions by Decade

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Can you guess when these famous inventions were created?

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In which decade was the telephone invented by Alexander Graham Bell?

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About Inventions by Decade

Can you guess when these famous inventions were created? Inventions by Decade packs 15 multiple-choice questions with a mix of 5 easy, 5 medium, 5 hard questions into a relaxed session of roughly 7 minutes — no sign-up, no timer pressure. An explanation appears after every answer, and finishing once a day keeps your streak alive.

A few sample questions

  1. 1. In which decade was the telephone invented by Alexander Graham Bell?

    Answer: 1870s

    Alexander Graham Bell patented the telephone in 1876. His first successful experiment was on March 10, 1876, when he transmitted the famous words: 'Mr. Watson, come here, I want to see you.'

  2. 2. In which decade did the Wright Brothers achieve the first powered flight?

    Answer: 1900s

    Orville and Wilbur Wright achieved the first sustained, controlled, powered heavier-than-air flight on December 17, 1903, at Kitty Hawk, North Carolina. The first flight lasted 12 seconds.

  3. 3. In which decade was television first demonstrated to the public?

    Answer: 1920s

    Television was first publicly demonstrated in the 1920s. John Logie Baird gave the first public demonstration of a working television system in London in January 1926.

  4. 4. In which decade was the World Wide Web invented by Tim Berners-Lee?

    Answer: 1980s

    Tim Berners-Lee invented the World Wide Web in 1989 while working at CERN in Switzerland. The first website went live on August 6, 1991.

  5. 5. In which decade was the light bulb made commercially practical by Thomas Edison?

    Answer: 1870s

    Thomas Edison developed a commercially practical incandescent light bulb in 1879. While others had created electric lights before him, Edison's bulb was the first to last long enough for practical use.

Things you'll learn along the way

  • Alexander Fleming discovered penicillin in 1928 when he noticed that mold had killed bacteria in a petri dish. It was the first true antibiotic and revolutionized medicine.
  • The Altair 8800, widely considered the first commercially successful personal computer, was introduced in 1975. It inspired Bill Gates and Paul Allen to found Microsoft.
  • Percy Spencer accidentally discovered that microwaves could heat food in 1945 while working on radar equipment at Raytheon. The first commercial microwave oven was sold in 1947.

Frequently asked questions

Can I print Inventions by Decade?

Yes — use the Print button at the top of the page for a clean question sheet, or "Print with Answers" to make an answer key. Printed sheets work well for group play at home, in a classroom, or at a senior center.

Will I lose my progress if I close the page?

Your overall progress — XP, streaks, and badges — is saved in your browser automatically. A quiz that's underway restarts if you leave mid-game, but at about 7 minutes, Inventions by Decade fits comfortably in one sitting.

How many questions are in Inventions by Decade?

Inventions by Decade has 15 multiple-choice questions. Each one has four answer options and an explanation that appears after you answer, so you learn something even when you miss.

Is Inventions by Decade free to play?

Yes. The entire SeniorBrainGames catalog — including Inventions by Decade — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.

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