RPC Essays

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”

Science 04 Lesson 175

1.            What are scientists trying to learn from this project? I honestly don’t know. 2.            What kind of data are scientists using? If there is pelicans or other animals. If there is pelicans with a wing tag coyotes or mammalian predators if the is pelican eggs or if there is baby pelicans and if thereContinue reading “Science 04 Lesson 175”

History 04 Lesson 175

Smallpox vaccine- Who invented it? Edward Jenner. When was it invented? 1796 Where was it invented? Trinity, Newfoundland. How does it work? It stimulates a person’s immune system to develop antibodies and cells in the blood and elsewhere that can then help the body fight off a real smallpox infection. Why is it important? So, people don’tContinue reading “History 04 Lesson 175”


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