RPC Essays

History 05 Lesson 45

Steel Plow- Who invented it? John Deere. When was it invented? 1833. Where was it invented? Grand Decatur, Illinois. How does it work? The plow consists of a bladelike plowshare that cuts into the soil to begin to prepare it for planting. As it cuts a furrow, lifts it up, turns over, and breaks up theContinue reading “History 05 Lesson 45”

History 05 Lesson 40

Electromechanical Relay- Who invented it? Joseph Henry did. When was it invented? In 1835. Where was it invented? It was invented at the College of New Jersey. How does it work? Relays control one electrical circuit by opening and closing contacts in another circuit. Why is it important? So that we have light switches andContinue reading “History 05 Lesson 40”

History 05 Lesson 30

Platform scale- Who invented it? Thaddeus Fairbanks. When was it invented? 1857. Where was it invented? Johnsbury, Vermont. How does it work? A platform scale is a scale that measures the weight of objects loaded on a flat platform. The function of the platform is to transmit the weight of the object to the internal measuringContinue reading “History 05 Lesson 30”

History 05 Lesson 20

Portland cement- Who invented it? Joseph Aspdin. When was it invented? 1824. Where was Portland cement invented? Britain. How does Portland cement work? Portland cement is the basic ingredient of concrete. Concrete is formed when portland cement creates a paste with water that binds with sand and rock to harden. These ingredients, when heated at highContinue reading “History 05 Lesson 20”

History 05 Lesson 15

The Pencil-                                                          Who invented it? Nicholas-Jacques Conte. When was it invented? 1795. Where was it invented? Nuremburg, Germany. How does is work? Graphite molecules are flat groups of carbon atoms that are stacked in layers. The layers slide against each other and allow the lead to slide off the pencil point and onto the paper. When youContinue reading “History 05 Lesson 15”

History 05 Lesson 10

Vapor Compression Theory- Who invented it? Oliver Evans. When was it invented? 1805. Where was it invented? I don’t know where Oliver Evans, but it was patented in England. How was it invented? Nothing tells me how it was invented so. Why was it invented? Also, nothing tells me why it was invented so. OliverContinue reading “History 05 Lesson 10”

History 05 Lesson 5

Introduction- I learned in the introduction that I would only learn about inventions from a timespan of 200 years. I also learned that inventors face adversity and that a lot of times have to make patents and if he invents something that is already invented, and the other person already has a patent he hasContinue reading “History 05 Lesson 5”

Science 05 Lesson 3

My favorite plants are cacti. Cacti are in the Acanthocereus genus. Cacti are both annual and perennial. Almost all cacti produce fruit. Last but not least you can only find them is deserts and dry areas.

Science 05 lesson 1

I would make homemade French toast. The ingredients would be homemade bread, (P.S I am allergic to a lot of the stuff in French toast so I would put replacers) egg replacer, cinnamon, almond milk, sugar, Fake butter, and vanilla. I would share it with my family, and I hope I encourage my mom toContinue reading “Science 05 lesson 1”

History 04 Lesson 180

Morphine- Who invented it? Freidrich Wilhelm Adam Serturner. When was it invented? 1803 Where was it invented? I don’t know. How does it work? Morphine is in a class of medications called opiate (narcotic) analgesics. It works by changing the way the brain and nervous system respond to pain. Why is it important? So people don’t get hurtContinue reading “History 04 Lesson 180”


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