gr4 history term 4 - communication Flashcards
what are some types of communication?
talking to each other by
- telephone
- sign language
- more code
- speaking in person
- whatsapp & other social media
- braille
- in writing (letters, emails, newspapers etc)
- radio
how old is the postal system?
thousands of years
what can be a problem swith the postal system?
it can be very unreliable
takes a long time
letter are sometimes lost and never arrive
what is a post stone?
a special stone on Robben Island that the first European sailors left letters underneath for ships returning to Eurpoe to take back with them
Describe the today’s postal system?
- Mail can be sent ANYWHERE in the world
- the sender pays in advance usually by buying STAMPS to put on the mail
- people put letters & package into a postbox
- we also use COURIER services to send mail & packages
What is a radio?
a form of communication invented about 100 years ago,
that sent and received signals without using wires,
so that people could listen to programmes in their OWN HOMES
why was the radio sometimes called a wireless?
it sent radio signals without wires
why was the radio so popular?
because people could listen to entertainment in their OWN HOMES. in the 1920s the stations were broadcasting news, music, sports, drama and variety
who invented the radio?
many clever people contributed but mainly GUGLIELMO MARCONI who was an Italian teenager who was fascinated by radio signals. He won a Nobel Prize for his work
what is a television?
a device that invented in 1930s that allowed people to hear sound and see moving pictures on a screen
when did people in South Africa get television
in 1976
why was the television a good invention?
because it has many benefits, such as:
- LEARB about the world (with news and programmes about animals/space/history)
- brings families and friends TOGETHER to watch SPORT and favourite shows
- entertainment
- teaches new things (cooking, music)
why was the television a bad invention?
it has many negative effect, such as:
- encourages LAZINESS (watching too much and not exercising or playing outside)
- too much can be bad for our eyes and HEALYH
- violent/SCARY shows can make people afraid/worried
- can WASTE TIME (instead of reading/learning/spending time with family/friend)
How should you write an answer that needs to be paragraph?
Use HAMBURGER paragraph writing
what is the QWERTY keyboard?
the keyboard designed to stop the letters JAMming when people typed QUICKLY on the old non-electric typewrites
named from the first 5 letters on the top right
Why do computers use the QWERTY keyboard?
because people were used to it
who invented the telegraph?
Samuel Morse
what code did the telegraph use?
Morse code which is a combination of dots and dashes. Each letter of the alphabet has it’s own combination of dots and dashes
how did telegraphs work?
- the sender TYPE in the dots and dashes
- the SIGNAL was sent to the receiver
- the receiver (machine/device) made a PAPER copy with raised dots and dashes
- the receiver (person) TRANSLATED the dots and dashes
who invented the telephone?
Alexander Graham Bell
when was the telephone invented?
1876
(148 years ago)
how does the telephone work?
communicates sounds along electrical wires
how have cellphones changed our daily lives?
- Communication - made it easy to stay connected to loved ones from anywhere with calls, text messages and instant message apps. Cells phones make the world feel smaller and brings people closer together
- Work- revolutionised. Email, calendar apps, productivity tools so we can work remotely, flexibly, stay organised
- Information access - everyone now has a “library in their pocket” . Browse internet, read news, educational resource, learn new skills
Describe the first cameras
Big and heavy (even the first hand held cameras)
Hard to use and carry around
Difficult to develop the photos, which had to be done quickly in a dark room
what were the first computers like?
very big and difficult to use.
where were the first computer mainly used?
universities and governments
when did Martin Cooper make the first cell phone call?
3 April 1973
Describe how cell phones have changed over time
Used to be very BIG, just for phone CALLS and not many people owned them
Now very SMALL and can do many more things (apps, messages, cameras)
What was the Kodak?
a small box camera invented by George Kodak. It used rolls of film and anyone could use it.w
hen did people start using digital cameras?
in the 1990s
describe digital cameras
cameras that do not need film, and you can check the photos on the camera screen immediately after taking them
what was the computer revolution?
when computers became smaller and easier to use, so that ordinary people could buy then to use in homes, school and at work
what is a PC?
a Personal Computer
Who is Bill Gates?
was involved in the computer revolution
spent all his spare time trying to make better computers
he founded a company called Microsoft
what has transformed the way we use computers in the 21st century?
mobile and cloud computing
smartphones and tablets allow people to access data and apps from anywhere
what is the internet?
a wireless network that allows computers to share information
when did the internet start?
early computer networks that allowed computers to share information were first invented in the 1960s
when was the World Wide Web invented?
1994 by a computer programmer named Bill Joy
when did dot-com companies and online services become popular?
in the late 1990s and early 2000s
list three examples of social media platforms
YouTube
Facebook
Twitter
how did social media change the internet?
it made it easier for people to connect, share and create content online
how did the internet change our lives?
made it easier
- to communicate and connect with people,
- access and share information
- to do shopping and get other services (online)
how has technology made communication easier and better?
- can reach anyone QUICKLY over any distance (telegraph, telephone, cellphones, internet)
- SHARE news and entertainment across the world, bringing people together (radios, TVs and the internet)
- WORK flexibly with people from ANYWHERE with video calls/meeting, emails, share documents etc (computers and the internet)
