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- 1. Multiple Choice
Sign language and written language are examples of signals used to communicate
True
False
- 2. Multiple Choice
Before a signal is sent, it must be decoded.
True
False
- 3. Multiple Choice
What do all signals that are used to communicate have in common?
They all involve light waves
They all send information
They all use printed words
They all use a series of sounds
- 4. Multiple Choice
What is a disadvantage of using radio waves to transmit information?
They do not permanently move matter.
They can travel over long distances.
They can be varied to hold information.
They lose energy as they travel through mediums.
- 5. Multiple Choice
How does noise affect a signal?
It causes the signal to deteriorate
It amplifies the signal
It allows the signal to travel further
It changes the signal as it moves from one medium to another
- 6. Multiple Choice
Which correctly orders the steps of communication using signals?
encode, transmit, decode
transmit, encode, decode
decode, transmit, encode
transmit, decode, encode
- 7. Multiple Choice
Which of the following does NOT send or receive signals carried by electromagnetic waves
cell phone
radio
talking in person
garage door opener
- 8. Multiple Choice
The following is the graph of ___________________________
An analog signal
A digital signal
- 9. Multiple Choice
All of the following are types of electromagnetic waves that can be used to transmit signals except ________________.
sound waves
light waves
radio waves
microwaves
- 10. Multiple Choice
The following is the graph of ___________________________
An analog signal
A digital signal
- 11. Multiple Choice
An analog signal is one that changes continuously
True
False
- 12. Multiple Choice
Radio waves are an example of a digital signal.
True
False
- 13. Multiple Choice
Computers use a series of ___________________ numbers to encode information
large
multiple
single
binary
- 14. Multiple Choice
Which is the best model of an analog signal?
a smooth wave
a light switch going on and off
a series of 1’s and 0’s
a series of pulses
- 15. Multiple Choice
Which best compares the reliability of analog signals and digital signals?
Only analog signals are reliable
Analog signals are more reliable than digital signals
Digital signals are more reliable than analog signals
Both types of signals are equally reliable
- 16. Multiple Choice
Which best describes binary numbers?
a continuously changing wave
a set of two discrete values
a large array of values
a set of four or five numbers
- 17. Multiple Choice
For which type(s) of signals does noise alter the original information?
analog only
digital only
both analog and digital
neither analog nor digital
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