Class 5 Exam > Class 5 Notes > Be an Explorer 5: Book Solutions, Notes & Worksheets > Chapter Notes: The World of Growing Knowledge
The World of Growing Knowledge Chapter Notes | Be an Explorer 5: Book Solutions, Notes & Worksheets - Class 5 PDF Download
Introduction
- Communication evolution: gestures, signs, sounds, cave paintings, smoke signals, drum beats.
- Key inventions: writing, numbers, paper, printing press.
The Story of Writing: Development of a Script
- Sumerians and Cuneiform Script
- First to develop writing.
- Used clay tablets with cuneiform script.
- Possibly used for counting animals or grain.
- Egyptians and Hieroglyphs
- Developed writing based on pictures (hieroglyphs).
- 24 letters formed from pictures.
- Other Indian scripts developed from Brahmi.
- Braille Script
- Developed by Louis Braille in 1825.
- Raised dots on thick paper for visually impaired.
- Revolutionized reading and writing for the blind.
The Story of Numbers
- Discovery of Zero and Decimal System
- Egyptians used 'One' for measurement.
- Indians introduced the concept of zero.
- Decimal system discovered using ten fingers for counting.
- Roman System and Braille Numbers
- Romans used symbols for numbers (I, II, III).
- Louis Braille developed Braille numbers for the blind.
- The Invention of Paper and Printing Press
- Paper Invention
- Egyptians invented paper from papyrus plant.
- Chinese improved papermaking, guarded the secret for 500 years.
- Printing Press Revolution
- Johannes Gutenberg invented the printing press in the 1450s.
- Molds of letters used to print the Bible.
- Changed the way books were produced.
Evolution of Printing Technology
- Traditional Printing
- Handwritten books were slow and expensive.
- Invention of the printing press allowed mass production.
- Modern Printing
- Electronic printers: EP-101, Daisy Wheel.
- HP Laser Jet initiated Desktop Printing in 1984.
- Introduction of personal computer printing by 1990.
- 3D Printing
- Emerging technology from 2010.
- Reproduces physical objects.
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Conclusion
- Printing technology's evolution from handcrafted books to modern electronic and 3D printing.
- Ongoing advancements in communication and knowledge growth.
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