The Element Iron :: Chemistry Essay

Iron comes from the Latin word ferrum. From ferrum its symbol became Fe. The atomic number of iron is 26, and its atomic weight is 55.845. Iron is a magnetic, bendable, shiny white metallic element. Pure iron has a hardness that ranges from 4 to 5. It is soft and ductile. Iron can be easily magnetized at ordinary temperatures and at 790Â °C the magnetic property disappears. Pure iron melts at about 1535Â °C, boils at 2750Â °C, and has a specific gravity of 7.86. Chemically, iron is an active metal. When exposed to humid air, iron forms a reddish-brown, flaky, decay known as rust. Iron is the fourth most abundant element in the Earth’s crust. Because it is so common, iron has been used by human society for thousands of years. Iron was known and used for weapons in prehistoric ages, the earliest example still in existence; a group of rusty iron beads found in Egypt, dates from about 4000BC. This period in history was given the name Iron Age because it was the time when people found ways to get iron and to use it for building tools and weapons. The beginnings of modern processing of iron can be traced back to central Europe in the mid-14th century BC. Pure iron has limited use in today’s world. Commercial iron always contains small amounts of carbon and other impurities that change its physical properties, which are much improved by the further addition of carbon and other alloying elements. This helps to prevent oxidation, also known as rust. Iron is an essential part of a healthy diet. Iron compounds are employed for medicinal purposes in the treatment of anemia, when the amount of hemoglobin or the number of red blood corpuscles in the blood is lowered.

The Dangers of Joyriding

1. a pleasure ride in an automobile, esp. when the vehicle is driven recklessly or used without the owner's permission Monday, 12:10 a. m. : Seven Statesville teenagers, joy-riding in a stolen car, lost their bid to outrun a police cruiser. They left the road at 100 mph, hit a tree and died instantly. The unlicensed driver was 15. On average, a car is stolen or broken into every 25 seconds. Every year, hundreds of thousands of people are killed or injured from car crimes.The victims could easily be one of your family or friends. Most car offenders are between 17 and 25 years old and most of them started offending between the ages of 13 and 16. It’s a very serious problem that has been happening all over the country. Even if you were just trying to have a good time, many states find joyriding a serious offense. The main difference between joyriding and a charge for grand theft auto depends on your intent. You could just want to â€Å"borrow† the car for a few hours, or a ctually steal it from the owner.One of the biggest dangers of joyriding is traffic accidents. Many teenagers who go joyriding are inexperienced and unlicensed. They go do it just to seem cool or to just go and have fun! But it’s a very bad idea because you might get caught, or in an accident, unless you’re a very good driver. But if you’re a very good driver, you should have your license already. In conclusion, this is why you should never take a car without asking first or having a license.

White And Black People s Influence On American Culture...

Throughout the 1920s and 1930s, a number of demographic, political, and economic changes greatly impacted American culture and society. (Patterson Carney, 2003.) White and black people in America were still segregated and African Americans were treated as inferior (â€Å"BBC - Higher Bitesize History - Race relations between the wars,† n.d.), though they began to fight against discrimination in this period. (â€Å"Jazz Exacerbates Racial Tension,† n.d.) Music both reflected and played a role in the changing attitudes towards race in the US at this time. From the early 1920s until the early 1950s, major and independent record labels labeled records recorded by African American artists as â€Å"Race Records†. (â€Å"‘Race Records’-Definition,† n.d.) The term†¦show more content†¦I will do this by outlining the role of race in American society during the 1920’s, the migration of many African Americans to the North, the creation of â€Å"Race Records† and the way in which Blues music was marketed to African Americans. Then, I will analyse the role of race in the creation and development of Jazz, the attitude towards African Americans in US society as reflected in Jazz music, the tensions between black people, white people and Creoles in New Orleans and the impact this had on the creation of Jazz, and finally discuss the role of race in Vaudeville. Despite slavery being abolished in 1865 and black people in America being legally free, most white Americans still considered African Americans to be inferior. They faced constant discrimination and hostility, and were treated as second-class citizens. (â€Å"BBC - Higher Bitesize History - Race relations between the wars,† n.d.) In the Southern states of America, where the majority of African Americans lived in the early 20th Century, white superiority was enforced and racial discrimination was legal. Southern states introduced laws to keep black people and white people separated and limit African Americans’ rights, and it was virtually impossible for them to challenge segregation. (â€Å"BBC - Higher Bitesize History - Race relations between the wars,† n.d.) The South became a very