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Analog Vs. Digital Signals

Authored by Kyle Asmus

Science

8th Grade

NGSS covered

Used 272+ times

Analog Vs. Digital Signals
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Analog encoding sends or stores information using quantities that

can vary continuously.

can only have specific values.

are separated by consistent numbers.

store waves’ crest and trough sizes in small steps.

Tags

NGSS.MS-PS4-3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Digital encoding sends or stores information using quantities that

can vary continuously.

can only have specific values.

have no numeric gaps between one another.

create smooth curves inside a sound wave.

Tags

NGSS.MS-PS4-3

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT an analog device?

a light knob that can adjust brightness between fully on and off

a mouse connected to your computer controlling your cursor

an FM radio tower broadcasting music

a runner’s watch that can time to thousandth-second intervals

Tags

NGSS.MS-PS4-3

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an advantage of digital over analog?

Digital controls allow you more control over exact movement and direction.

Digital calculations give you more accurate measurements.

Digital controls move objects in predictable, exact increments.

Digital devices generate stronger, more precise signals and waves.

Tags

NGSS.MS-PS4-3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A signal is

a radio wave with an unchanging amplitude and frequency.

a radio wave with an unlimited range.

a wave that can only be generated in analog.

anything that carries information and can be detected.

Tags

NGSS.MS-PS4-3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

AM and FM radio stations

switch between analog and digital signals to broadcast sound waves.

transmit sound using multiple frequency ranges, including radio waves, visible light, and ultraviolet light.

change the amplitude or frequency of waves to encode sounds.

convert broadcasts into binary code.

Tags

NGSS.HS-PS4-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Why is the weak analog signal harder to hear?

The weak signal’s sound and clarity decrease corresponding to its amplitude.

Radios have trouble distinguishing between weak signals and random noise.

Increased distance causes wavelengths and frequencies to change.

Radios have trouble connecting with lower-energy waves.

Tags

NGSS.MS-PS4-1

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