Galvanized iron is steel sheet that has been coated with zinc; tin cans are made of steel sheet coated with tin. Discuss the functions of these coatings and the electrochemistry of the corrosion reactions that occur if an electrolyte contacts the scratched surface of a galvanized iron sheet or a tin can
Kaitlyn Yoder 1/17/2017 Notes: The Agricultural Revolution: Crash Course World History #1 (video) o Farming: Advantages of farming: Control food supply, support perm. Settlements, surplus, storage, can be practiced all over the world, Disadvantages of farming: Population increase, more labor → slavery, o Herding: Advantages of herding: Meat, wool, leather produced by them, you can have herds and reproduce them, Disadvantages of herding.: The domesticable animals must be native to your location o Agriculture could have arisen because people wanted more food They see and know that seeds germinate when planted and make food, so they wanted more of it Mankind: The Story of All of Us Birth of Farming (video) o Either continue hunting or settle and survive on the land o We had to develop better tools and processes o When we switched from moving around, hunting, and gathering, we began to claim and fight over land → War o Agriculture is the difference between having millions of people on this planet and billions of people on this planet The Role Of the Farmer Current population of U.S. Population ~ 320 million ****** Approximately 2 million Farms in the US**