Transcript 訊息傳播方法

Primary 4
Communication
in the
Ancient
and
Modern times
Do you know the ways
of communication in
ancient times?
Beacon-fire
It is used to
call for help.
Beating a drum
It is used to
warn others.
Pigeon
It is used to
carry letters.
Messengers
They are
used to
send
messages
to others.
What about some
of the ways
of communication
in modern times?
Post
It is a way to send
letters with the
help of postmen.
They deliver the
letters to people’s
homes or
workplaces.
Telephone
It is a way
for people to
communicate
with others
directly.
Television
It is used to
transmit and
receive
messages,
sounds and
images
in forms of
news,sports,
entertainment
and commercials.
Pager
It is a portable
machine, which
can be signaled
to send a one
way message
to the
pager owner.
Radio
It is used to
transmit and
receive sounds
and messages
live invisibly
through the air.
Fax machine
It is used
to transmit
texts or images
on papers
through a
telephone line
instantly.
Internet
It is a network
that connects
computers from all
over the world
so that people
can communicate
with each other.
Cellular phone
It is a mobile
and portable
device used by
people to
communicate with
each other all
over the world
anytime and anywhere.
Devices for storing information
computer
scanner
Palm machine
camera
Video recorder
Lab top
It’s revision time!
See how much you could remember!
Which way of communication would you
use to get the following information?
The weather forecast
OR
Try another one!
Which way of communication would you
use to get the following information?
Tell a friend abroad about your recent life
OR
Try another one!
Which way of communication would you
use to get the following information?
Get help from the police after seeing
an accident
OR
Bye!