My Favorite History Inventions In the RPC (From 5th Grade)

In RPC, I have seen a lot of inventions, and I've liked them all. For today's post, I've chosen 10 of the (140) inventions discussed in the RPC History lessons as my favorites. I'll post them all here. Telephone World Wide Web Motion Pictures Coca-Cola Flash Memory Riveted Blue Jeans Ice Cream Maker Safety Elevator…

Time and Inventions

Planets in Astrology: In ancient times, people believed in two types of celestial bodies: fixed stars and “wandering stars” that appeared to move. Early astronomers identified five visible planets, which eventually expanded to include the Sun and the Moon, for a total of seven planets, according to astrology. In modern astrology, planets symbolize deep urges…

Review Essay from Lessons 171-174

Flash Memory: Flash memory is a type of memory storage device commonly found in computers and electronic devices. It has mechanical shock resistance, making it popular in portable devices. Flash memory can retain its data even without any power. It's a type of small, non-volatile random-access memory that doesn't have any moving parts. It was…

Review Essay from Lessons 165-169

TCP/IP Internet Protocol Suite: The Internet protocol suite, also referred to as TCP/IP, encompasses a conceptual model and a collection of communication protocols utilized on the Internet and other computer networks. It consists of foundational protocols like the Transmission Control Protocol (TCP) and the Internet Protocol (IP). The Internet protocol suite is a comprehensive framework…

Review Essay from Lessons 161-164

Unix: Unix (trademarked as UNIX) is a family of multitasking, multiuser computer operating systems. This design approach simplifies the development process by breaking it down into smaller, more manageable tasks. These tasks are executed using specialized tools that focus on specific functions. By leveraging a unified file system and employing shell scripting and command languages,…

Review Essay from Lessons 156-159

Polio Vaccine: Polio vaccines have been instrumental in decreasing the global spread of poliomyelitis. Oral polio vaccines have a low risk of causing vaccine-associated paralytic poliomyelitis, while the risk of paralysis from a natural polio infection is much higher. In 1955, Jonas Edward Salk, an American medical researcher, and virologist, developed one of the earliest…

Review Essay from Lessons 151-154

Electron Microscope: An electron microscope is a sophisticated scientific instrument employed to analyze objects at a microscopic scale, utilizing a high-energy electron beam for this purpose. Visible light lets the transformation of the arrangement of elements, as indicated by the movement of electrons, into an image that is perceptible to the human eye. The electron…

Review Essay from Lessons 146-149

Crystal Oscillator: A crystal oscillator is a circuit that utilizes the mechanical resonance of a piezoelectric crystal to generate an accurate electrical signal with a specific frequency. The functioning principle behind quartz crystal oscillators involves the application of voltage to an electrode, which then causes the crystal to undergo distortion. In the year 1917, Alexander…

Review Essay from Lessons 141-144

Safety Razor: A safety razor is a shaving tool that has a protective device placed between the blade and the skin. The primary purpose of these protective devices is to make shaving safer and less dependent on the skills of a professional barber. A typical razor is usually equipped with a set of cutting edges,…

Review Essay from Lessons 136-139

Diesel Engine: The diesel engine, which is often referred to as a compression-ignition engine, was named after its inventor. It operates by igniting the fuel through the heat induced by the contraction of air in the combustion chamber, as opposed to using spark plugs like gasoline engines. Rudolf Diesel, a German inventor & mechanical engineer,…