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telephone
allowed us to communicate with people from great distances. converts the sound waves to electrical signals, which are sent through the telephone network to the other phone, where they are converted back to sound waves by the earphone in the other phone's handset. -
automobile
a wheeled motor vehicle used for transporting passengers, Runs on gasoline or other various fuel. -
Radio
is the transmission of signals of electromagnetic waves with frequencies . music or talking can be heard through a radio from another location. -
Period: to
The Great Migration (african american)
The great migration is when over 2 million african americans migrated out of the southern U.S. to the Midwest, Northeast and West. Lots of african americans migrated away from the south to escape discrimination, violence, and racial segregation, -
18th amendment
which defined "intoxicating liquors" to exclude those used for religious purposes, -
19th amendment
prohibits any United States citizen to be denied the right to vote based on sex. -
Emergency Quota Act
-restricted immigration into the United States.
-proved in the long run the most important turning-point in American immigration policy
-added 2 new features to American immigration law: numerical limits on immigration from Europe and the use of a quota system for establishing those limits.
the number of new immigrants admitted fell from 805,228 in 1920 to 309,556 in 1921-22. -
Immigration Act of 1924
was a United States federal law that limited the number of immigrants who could be admitted from any country to 2% of the number of people from that country who were already living in the United States in 1890, down from the 3%. -
television
The day that television was invented. You can watch movies and shows with it. -
21st amendment
repealed the Eighteenth Amendment to the United States Constitution, which had mandated nationwide Prohibition. -
computers
A computer is a programmable machine designed to automatically carry out a sequence of logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem. The computer changed the way we do work and research etc... -
Internet
The Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies.