Signals and Telecommunication
What did the smoke signal mean in olden days?
Danger, need Help!
Within our Telephone, there is a chip that helps convert our sound into electric waves and transmits the signal to the electric post which them passes on further till it reaches the destination.
How are calls connected?
Mention 5 things that make a HIGH pitch sound.
High pitch:
What is the name of the killer whale who could speak?
Wikie
Whenever two things communicate, one is the ..................and one is the ...............
transmitter
receiver
Mention 3 differences between radios in the 1980's and in today's era.
- size
- Music can be paused and replayed the way we want and when we wish to hear.
- Many apps are used today instead of big disks or tapes.
How were handwritten letters or messages sent in the olden days before the postal service into existence?
Through Pigeons, Camels, and then through Pony express(Horse)
Even today navy and army officers use this code to transmit information.
Morse code
True or False: First video conferencing was created in 1970.
True
What are Morse codes?
These are signals that use Dots and dashes to transmit a message and are used in communication.
The biggest change in the evolution of communication came from the invention of ......
Internet.
Mention at least 3 technological advances in the computers used during the 1980's and today.
- size
- initially they were 4 different parts, but now its compact - Monitor, Mother board, key board and a webcam
-Portable , economical, etc.
In 1989, by Tim Berners Lee.
When was the internet invented?
List 5 things that make a LOW pitch sound
For example, a low sound might be a big booming drum. A high sound could be a shrill whistle. A low sound could be the roar of a lion.
What is binary code?
This code uses only ones and zeros.
List 5 benefits of how technology has impacted us through Smartphones?
We can call, video call, email, send text messages, listen to music, watch videos, help calculate, use google maps and know the location etc.
How would the paleolithic people communicate with each other?
Using gestures and/or drawings!
Instagram, twitter, snapchat, whatsapp, Facebook etc.
What are 5 types of digital communication apps (Social media apps)?
Additional apps get additional 10 points each.
What can sound waves not travel through?
Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.
Can all the people who live in rural interiors connect and make calls easily? Why or why not?
They may not as many areas they may not get the signal. There are very few Electric towers there to catch the electro waves, thus this may take time.
How is digital communication important? After the first answer, each additional importance gets extra 50 points.
It helps us connect with our families and friends. It has helped enhance trading globally.
....
Mention the steps involved in the Evolution of communication.
Earlier they would communicate.... and so on..
Signals, drawing, fire, letter writing, pony express, telegraph, telephone, internet, computers, and so on.
What is the Central Idea of this unit?
Evolving technologies enable communities to connect and exchange ideas.
True or False:
Sound waves travel through solid, liquid, or gas
True