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Inventions make life easier. Alexander Graham Bell invented the telephone, the Wright brothers built and flew the first aeroplane, Johannes Gutenberg invented the printing press and Louis Braille invented raised-dot writing for blind people. A stethoscope helps doctors hear the heartbeat and a compass helps us find directions.
✓ You passed this lesson’s test.
Who and what for? — “match the invention with its inventor and with what it helps us do”
Use it for: Class 4 GK and science lessons, science fairs and “how things work” projects.
Check: A telephone helps us talk to people far away ✓
▶ Watch it animatedRead the question, think about what you know, then tap your answer. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 💡 Invention Investigator badge when you pass — and a certificate when you finish all 6 lessons of Part 4 · Class 4 GK. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India and visit homes in selected cities. Tell us what you need and our team will call you with timings and fees.