Analog Signals
This word describes a signal made of a continuous stream of data
analog signals
This type of signal is generated by sampling a stream of continuous data at regular _____________.
intervals
In the context of technology, this is a value that varies over time in a way that conveys information.
signal
This type of wave must have a medium (like air, water, or ground) to travel.
mechanical waves
This type of signal has __________ __________, unlike its digital counterpart, which has only two.
varying amplitudes
Digital signals are generally considered more _______________ than analog signals and can be easily corrected to eliminate noise.
reliable
The highest point of a wave, like the peak of a hill.
crest
This type of wave does not require a medium and can travel through the vacuum of space.
electromagnetic waves
Analog signals are said to be less reliable because the _______________________ over distance, requiring amplification.
signals degrade
Digital signals represent data using two discrete states, which are commonly referred to as on or off or by these _________________.
1s and 0s (or binary code)
The term for the squished area of a longitudinal wave, where the particles are closest together.
compression
Sound waves and earthquake waves (seismic waves) are examples of this type of wave.
mechanical waves
This common device (an example of older technology from the book) uses an analog signal to transmit a voice call.
landline telephone
This is a disadvantage of using digital signals, as rapid technological improvements often cause the technology to be _____________________ quickly
outdated
This digital security method can be used to protect digital signals, helping them remain secure.
encryption
The entire visible light spectrum is part of this larger group of waves.
electromagnetic waves