This is America. Гришенкова Е.Г. - 16 стр.

UptoLike

ВУЗ: 

УлГТУ | Ульяновск

Составители: 

Рубрика: 

16
Before leaving the science exhibit, people can visit the Hands On Science
Center. Experts here can explain how science affects American culture and society.
Anyone can ask the experts questions. There are also games and projects for children.
Next to the Hands On Science Center is an exhibit on information technology.
More than seven hundred objects and pictures are in this area. The exhibit explains
how information technology has changed the way people live around the world.
Visitors can use computers and other kinds of technology in this exhibit.
The history of information technology began in the 1800s with the creation of
the telegraph. This was the first device to send communication over long distances.
Samuel Morse developed the telegraph in 1837. Messages were sent and received
using a series of electric beats representing words. This type of immediate
communication is called Morse Code.
Visitors can experiment with Morse Code using a telegraph device. Eleven-
year-old Mark Wheeler from California typed out a warning signal using Morse
Code. The message represents the letters “CQD,” which mean “come quick, distress.”
It was the same message the Titanic passenger ship sent out before it sank in 1912.
Mark said he learned Morse Code from the Internet computer system. He said he
knows other signals, but “CQD” was the most common and useful Morse Code
message.
The information technology exhibit also teaches visitors about the history of
radio and television. There is even an area explaining how computer and satellite
technology spread news and information today.
Information technology would not work without electricity. So visitors might
want to examine the next exhibit called the “Nature of Electricity.” Visitors learn
about Thomas Edison and the invention of early electric light. The first part of the
exhibit tells about 19th century forms of power, such as batteries and magnets. There
are even some early electric lights that helped form the technical base for Mr.
Edison’s work.
The exhibit also tells about Thomas Edison’s family and the people he worked
with. Mr. Edison produced not just a light bulb, but an electrical system. The exhibit
even has a model of his first central power station in New York City. The Pearl Street
station began producing power in 1882. Electricity became the world’s leading form
of power in fewer than twenty years after Mr. Edison’s invention. A revolution had
taken place. Low cost electric power had made new industrial growth possible.
An exhibit about the history of money and metals is on the top floor of the
American History Museum. Visitors can see how American money has changed over
time. For example, there are one hundred dollar bills dating back from the late 1800s
until today. Visitors can see the different dollar bills issued by the American colonies
in the late 1700s. There are also examples of memorial coins released for special

Страницы