Signal Processing Quiz

How does the total amount of information differ between an analog and a digital signal?

• A digital signal has more information because it has more values than an analog signal.

• A digital signal has more information because it has fewer values than an analog signal.

• An analog signal has more information because it has more values than a digital signal.

• An analog signal has more information because it has fewer values than a digital signal.

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Why do most modern devices use digital signals?

• Digital signals contain more information than analog signals.

• Digital signals are more reliable over long distances than analog signals.

• Analog signals contain more information than digital signals.

• Analog signals are more reliable over long distances than digital signals.

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NGSS.MS-PS4-3

A transmitter on the moon emits sound and light waves to a receiver on Earth. The light waves are picked up by the receiver but sound waves are not. This happens because _______________.

Which part of the longitudinal wave shown above represents one wavelength?

• Part A

• Part B

• Part C

• Part D

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NGSS.MS-PS4-1

The diagram above shows a triangular wave. Which lettered part represents the amplitude of the wave?

• Part 1

• Part 2

• Part 3

• Part 4

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NGSS.MS-PS4-1

Plucking a guitar string creates a wave whose motion is perpendicular to the downward force on the strings. The movement of the string is an example of a ___________.

Select the phrases below that are characteristics of sound waves. (NOTE: select more than one answer.)

• Travels faster in solids than through air

• Always travels at the same speed

• Causes molecules to increase in size

• Can travel through any type of matter

• Can cause objects to vibrate

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Which material reflects the most light?

• Wax paper

• Aluminum foil

• Plastic wrap

• Brown paper

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When a musician blows into a trumpet, a sound wave is formed that moves in the same direction as the musician’s breath. This is an example of a

• Microwave

• Lightwave

• Longitudinal wave

• Transverse wave

Which would create the highest frequency?

• 20 waves in 10 seconds

• 30 waves in 5 seconds

• 100 waves in 10 seconds

• 5 waves in 5 seconds

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