A(n) analog signal is one that changes continuously

• True

• False

Radio waves are an example of a digital signal.

• True

• False

Digital signals are more affected by noise than analog signals.

• True

• False

Computers use a series of ______ numbers to encode information.

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

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.

Which best describes binary numbers?

• a continuously changing wave

• a set of two discrete values , 0 and 1

• a large array of values

• a set of four or five numbers

For which type(s) of signals does noise alter the original information?

• analog only

• digital only

• both analog and digital

• neither analog nor digital

Identify the type of signal represented by each figure.

• figure 1 is analog signal

• figure 1 is digital signal

• figure 2 is digital signal

• figure 2 is analog signal

Describe in words, what did you learn today?