Social Studies Chapter 6 Lesson 3 & 4 Flashcards
Cyrus Hall McCormick
Invented the reaper, a machine that cut grain in 1831.
What is one of the most important inventions of the late 1800’s.
The automobile or car.
Invention
Is something that is made for the first time
What tools do people use to communicate?
We use tools, such as telephones, radios, televisions, and computers.
Assembly line
Each worker does only one part of a job. The assembly line helped Ford build the Model T.
Name some famous activists who fought for freedom.
Frederick Douglass, Harriet Tubman, and Martin Luther King jr.
Equal rights
In the late 1800’s and early 1900’s more people began to work on giving Americans equal rights or the same rights as others.
Activist
Someone who works hard to make a change
[Check this]
How has communication changed in the last 20 years?
Many telephones do not use wires. Instead, satellites quickly send and receive signals for radios, televisions, cell phones, and computers.
Technology
Is the scientific knowledge about how things work
Telegraph
Is a machine that sends and receives signals through a thin wire. In 1844, the first telegraph message was sent between two cities.
Who collaborated on the Television?
The idea of the television is based on the work of Morse, Bell, Marconi, and many other scientists.
Mary McLeod Bethune
1904 opened a school for African American girls in Florida in response to segregation.
Guglielmo Marconi
An Italian inventor who found a way to send messages without wires and patented a way for radio signals to travel through air in 1896 and received the first radio message sent across the Atlantic Ocean in 1901.
Jonas Salk
Used Jenner’s ideas to invent a vaccine against polio and gave a dead form of the polio virus.