All questions of Inventions and Discoveries for Class 1 Exam

Introduction to the World Wide Web
The World Wide Web (WWW) is a system that has transformed how we access and share information globally. Its creation is attributed primarily to two individuals: Tim Berners-Lee and Robert Cailliau.
Who is Tim Berners-Lee?
- Tim Berners-Lee is a British computer scientist.
- He proposed the idea of the Web in 1989 while working at CERN.
- His vision was to create a universal linked information system.
Collaboration with Robert Cailliau
- Robert Cailliau, a Belgian computer scientist, collaborated with Berners-Lee.
- Together, they developed the first successful communication between a Hypertext Transfer Protocol (HTTP) client and server.
- Their partnership was crucial in turning the concept into a functioning system.
Key Contributions
- Invention of HTML: Berners-Lee developed Hypertext Markup Language (HTML), the standard markup language for documents designed to be displayed in a web browser.
- Development of URLs: They introduced Uniform Resource Locators (URLs), which provide a way to locate resources on the web.
- Creation of HTTP: Hypertext Transfer Protocol (HTTP) was established to facilitate communication between web browsers and servers.
Impact of the WWW
- The WWW revolutionized how we communicate, access information, and conduct business.
- It laid the foundation for the modern internet, enabling countless innovations in technology and connectivity.
In conclusion, Tim Berners-Lee, alongside Robert Cailliau, played a pivotal role in inventing the World Wide Web, making it one of the most significant inventions in human history.

Introduction:
The steam engine is a revolutionary invention that played a significant role in the Industrial Revolution. It was invented by Thomas Savery in the late 17th century.

Explanation:
The correct answer to the question is option 'B', Thomas Savery. Let's delve into the details of why he is credited with inventing the steam engine.

Thomas Savery:
Thomas Savery was an English engineer and inventor who lived from 1650 to 1715. He is known for his contributions to steam power and is credited with inventing the first practical steam engine.

Invention of the Steam Engine:
In 1698, Savery patented his steam engine, which he called the "Miner's Friend." This steam engine was primarily designed to pump water out of mines, which was a crucial need during that time. The steam engine was a significant improvement over the existing methods of removing water, such as using manual labor or animal-powered devices.

Working Principle:
The Savery steam engine worked on the principle of pressure and vacuum. It consisted of a boiler that generated steam by heating water. The steam was then transferred to a cylinder, where it displaced the air, creating a partial vacuum. This vacuum allowed atmospheric pressure to push water up from the mineshaft into the cylinder. Once the cylinder was filled with water, valves were opened to release the steam, resulting in an increase in pressure. This pressure forced the water out of the cylinder and up to the surface.

Limitations:
Although Savery's steam engine was an important development, it had some limitations. It was inefficient, consumed a large amount of coal, and required constant attention to maintain its operation. Furthermore, it could only pump water from shallow depths and was not suitable for other applications.

Conclusion:
In conclusion, the steam engine was invented by Thomas Savery. His invention marked a significant milestone in the history of technology and paved the way for future advancements in steam power. Despite its limitations, the Savery steam engine laid the foundation for the development of more efficient and versatile steam engines in the years to come.

Orville and Wilber wright

Introduction
The invention of the telephone is a significant milestone in communication history, primarily attributed to Alexander Graham Bell.
Who is Alexander Graham Bell?
- Born on March 3, 1847, in Edinburgh, Scotland
- An inventor, scientist, and teacher
- Focused on communication methods for the deaf, which influenced his inventions
The Invention of the Telephone
- Bell was granted the first US patent for an "improvement in telegraphy" on March 7, 1876.
- He demonstrated the first successful telephone call on March 10, 1876, when he famously said, "Mr. Watson, come here, I want to see you," to his assistant, Thomas Watson.
- This marked the first time clear speech was transmitted electrically.
Significance of the Telephone
- Revolutionized communication by allowing voice transmission over long distances.
- Laid the groundwork for future innovations in telecommunication.
- Fostered global connectivity, impacting personal and business communication.
Controversies
- While Bell is recognized for the invention, there were other inventors, such as Elisha Gray, who filed similar patents around the same time.
- Despite this, Bell's successful demonstration and patent secured his legacy as the telephone's inventor.
Conclusion
Alexander Graham Bell is celebrated as the inventor of the telephone due to his successful patent and demonstration. His contributions have had a lasting impact on how we communicate today.