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How Information Is Transferred - Review
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When you make a video call, what is being sent?
 
patterns of digital informatioon
 
sound waves
 
only your picture
 
vibration patterns
When you send a text message, the message is sent as
 
digital signals
 
sound waves
 
smoke
 
hand movements
A student sends a signal but the receiver misunderstands it. What is the best way to improve the system?
 
make the pattern clearer
 
use more signals
 
send the message faster
 
change the meaning of the code
Traffic signals use red light for stop and green light for go. Why is this an effective system?
 
the colors follow a clear meaning all over the world
 
the colors are bright enough to see from far away
 
red and green are common colors
 
the lights flash very quickly
A classroom is very noisy. Which method would best send a message across the room?
 
flashing light in a pattern
 
speaking loudly
 
playing music
 
whispering
Why do we need both a sender and a receiver in information transfer?
 
Information must be sent and understood
 
Waves cannot travel without both
 
The receiver cleans the signal
 
The sender makes food
Which digital image would be clearer and smoother?
 
many small pixels
 
few large pixels
What does a network do?
 
connects devices so they can share information
 
slows down the internet
 
cleans up your WiFi signal
 
makes pictures
When a message is sent through sound, it travels as:
 
vibrations
 
light waves
 
colors
 
binary code
When a person uses Morse code, they are sending:
 
a pattern of dots and dashes
 
a picture
 
light energy
 
heat
A TV remote uses light that we can’t see to send information. What type of wave is this?
 
infrared light
 
sound wave
 
X-ray
 
gamma ray
Which of these describes a pattern?
 
A sequence like dot–dot–dash
 
random scribbles
 
a messy table
 
a cup of water
What does "signal" mean?
 
something that carries information
 
something that only makes noise
 
a picture of a person
 
a type of food
When a computer screen shows an image, the image is made of many:
 
pixels
 
wires
 
signals
 
waves
Which example shows information transfer using sound?
 
a cat meowing for food
 
a light turning red
 
a picture on a screen
 
a shadow moving
A pictograph shows information using:
 
pictures or symbols
 
shadows
 
electricity
 
letters
Which is an example of digital information?
 
A message made of 1s and 0s
 
a hand-drawn picture
 
a written letter
 
a drum beat
Which of the following is an example of information being transferred with light?
 
A blinking bike light
 
A drum beat
 
A person running
 
A book on a table
If you clap your hands to tell your friend "I'm ready," what are you using?
 
a sound pattern
 
heat energy
 
a chemical reaction
 
digital information
Why are patterns important for sending information?
 
Patterns help people know what the message means
 
Patterns make messages longer
 
Patterns are only for art
 
Patterns help messages stay secret
Which is an example of sound being used to transfer information?
 
A bird singing to warn others of danger
 
shadows changing during the day
 
rain falling on a roof
 
a photo on a phone
A lighthouse uses a bright light that flashes in a pattern. Why?
 
to transfer information to ships
 
to measure the waves
 
to follow the weather
 
to cook food for sailors
When you send a text message, what type of information is being used
 
digital information
 
potential energy
 
heat energy
 
food energy
Which signal is easiest for a computer to understand?
 
a pattern of 1's and 0's
 
a picture drawn by hand
 
a sound made by a drum
 
a spoken sentence
A digital picture is made from many tiny squares. What are those squares called?
 
Pixels
 
Pictures
 
Codes
 
Signals
A pattern of long and short beeps is used to send a message. What is this an example of?
 
Information transfer
 
A picture
 
Reflection
 
A type of matter
Which is an example of sending information with light?
 
Flashing a flashlight on and off
 
Playing the drums
 
Blowing a whistle
 
Talking to a friend
Why do people use codes to send information?
 
Codes help send messages clearly and quickly
 
Codes make messages longer
 
Codes are only for computers
 
Codes look cool
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