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A piece of information that is communicated through using the senses.

• Signal

• wave

• code

• noise

Verbal speech, braille, and reading a text all use...

• 
  signals to send information

• 
  the same code to send informaiton

• 
  the same senses to send a signal

• 
  electromagnetic waves to send a signal

A signals can be stored, encoded, or transmiteted.

• True

• False

To send a signal, who must understand how the signal was encoded?

• 
  just the sender

• 
  just the receiver

• both the sender and the receiver

• neither the sender nor the receiver

Which are examples of an encoded message?

(select ALL that apply)

• 
  a pile of rocks on a trail

• 
  

  Morse code

• 
  random clapping

• 
  street signals

Which are examples of transmitting a signal?

(select ALL that apply)

• 
  talking to another person

• 
  electromagnetic waves in wires

• 
  information stored on a hard drive

• 
  an encyclopedia

Unwanted modification of a signal.

• Frequency modulation
• Noise
• Signal enhancement
• Data compression

Which examples are causes of 'noise' in a signal?

(select ALL that apply)

• 
  increasing distance from the source

• 
  a clear connection

• interference from other signals

• 
  fiber optics

How do fiber optics send a signal?

• Fiber optics send a signal using light transmitted through thin strands of glass or plastic via total internal reflection.
• Fiber optics send a signal using electrical currents through copper wires.
• Fiber optics transmit signals using sound waves through air.
• Fiber optics send a signal by bouncing radio waves off metal surfaces.

Compare the two signals. Signal B...

(select ALL true statements)

• 
  is moving faster

• 
  has more noise

• 
  is not as clear or reliable

• 
  has more energy