Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Communication System

Senior Science

Cave Paintings Cave paintings 400 000 years ago In Asia and Europe Paintings found on cave walls and ceiling's Artist made them by carefully blowing paint around their hands that were pressed tightly against cave walls and ceilings
Paper Invented in 100 BC in China invented by emperor Ho-Ti In 105 AD a government official in China named Ts’ai Lun the first person who first started the paper making industry. The paper was made out of papyrus, cloth, tree bark, palm leaves and vellum.
Printing Press Printing press Invented around 1440 Invented by Johannes Gutenberg Introduced to the holy roman empire First book printed was the bible
Morse Code Morse code Morse code was invented in the mid 19th century by Samuel F.B. Morse A combination of long and short light or sound signals to represent the alphabet Used for communicating before voices could be transmitted
Phonograph Date it was invented: 1877 The sound vibration waveforms are recorded as corresponding physical deviations of a spiral groove engraved, etched or impressed into the surface of a rotating cylinder or disc. Device invented for the mechanical recording and
Digital TV Date it was invented: 1950s How it is used: is the transmission of audio and video by digitally processed and multiplexed signal, in contrast to the totally analog and channel separated signals used by analog television. Who invented it: Ask an America
Mobile Phones Who invented it: Martin "Marty" Cooper When was it invented: 1973 How is it used: From flip phones to camera phones and all the way to a phones with music and apps, cell phones help us communicate and connect us to the world. They're especially a must
Emails When was it invented: 1972 Who invented it: Ray Tomlinson How is it used: Email is widely used as a form of business communication and overall it is a highly effective communication tool. Email is inexpensive, only requiring an Internet connection that
Computers When was it invented: early 19th century Who invented it: Charles Babbage How is it used: Computers can provide a wide range of functions which make computers useful for everyday situations. They can be loaded with software of various types to perform t
Smoke Signals How it is used: The smoke signal is one of the oldest forms of long-distance communication. It is a form of visual communication used over long distance. In general smoke signals are used to transmit news, signal danger, or gather people to a common area
Created by: Claire31