Discover Theme 4 Chapter 3 Revision

One of the old ways of communication is...........

• telegraph

• telegram

• video chat

One of the new ways of communication is...........

• homing pigeon

• cell phone

• mailbox

It is a way for the blind to read.

• Braille

• Morse code

• sign language

huda@465#

This password is .......

• strong

• weak

To be safe online you have to ask adults for permission.

• true

• false

It is a good idea to use your name as a password.

• true

• false

We can use fire and smoke for communication.

• true

• false

We cannot communicate through the light.

• true

• false

.__.

It was used to send messages over long distances by telegraph.

• Braille

• Morse code

• Sign language

Morse code used short and long...............

• sounds

• lights

• numbers