Chapter 6 - Lesson 3 Flashcards
People communicate when they
pass their thoughts or information to others
The Pony Express was
a mail system that carried letters between San Francisco and St Joseph, Missouri
Young men carried letters for
75-100 miles through heavy snow and rain
An invention is something made for
the first time
People protect their inventions by getting a ____ on them
patent
A patent
gives a person the right to be o=the only one making or selling an invention
Who developed the telegraph
Samuel Morse (inventor of Morse code)
What is a telegraph?
a machine that sends and receives signals through a thin wire
Morse Code uses ___ and ___ to represent letters
dots, dashes
Who invented the telephone?
Alexander Graham Bell
Who developed a way to communicate without using wires?
Guglielmo Marconi (radio signals)
Where was the first television introduced to a large audience?
The World’s Fair in NY (1939)
Technology is
the scientific knowledge about how things work
In the last 20 years, many telephones do not use wires. Instead, signals are transmitted and received using
satellites
What is a conclusion?
a decision you make after you read facts and details
