Digital vs. Analog

What is the main difference between the wave images of an analog and a digital signal?

• Analog signals are noncontinuous waves; digital signals are continuous waves.

• Analog signals are square waves; digital signals are sine waves.

• Analog signals are continuous waves; digital signals are noncontinuous waves.

• Analog signals are surface waves; digital signals are noncontinuous waves.

Tags

NGSS.MS-PS4-3

When it comes to the transmission of data, what advantage do digital signals have over analog signals?

• They can transfer less data at slower speeds.

• They can transfer more data at slower speeds.

• They can transfer less data at faster speeds.

• They can transfer more data at faster speeds.

Tags

NGSS.MS-PS4-3

The diagram below represents which advantageous property of digital signals?

• Digital signals do not have a fixed range.

• Digital signals transmit data in the form of a wave.

• Digital signals transmit data in the form of bits.

• Digital signals have different amplitudes.

Tags

NGSS.MS-PS4-3

Whom do you most agree with?

• Martina

• Dontrell

• Nahla

• Ju-Long

Tags

NGSS.MS-PS4-3

When communicating with Apollo astronauts, scientists on Earth use radio waves and the 'over to you' method of communication. This method must be used because of the delay in communication. This delay is due to the ________.

• fact that sound waves do not travel in a vacuum.

• poor reflective nature of the surface of the moon.

• distance to the moon and the speed of electromagnetic waves.

• scattering of electromagnetic waves in space.

Tags

NGSS.MS-PS4-2

Nannette was working on cleaning up the noise from an analog signal and from a digital signal. Which signal would she have a harder time erasing the noise from?

• analog, because it is a continuous signal with infinite values, and the noise is blended in

• analog, because it is a discrete signal made up of ones and zeroes, and noise is blended in

• digital, because it is a continuous signal with infinite values, and the noise is blended in

• digital, because it is a discrete signal made up of ones and zeroes, and noise is blended in

Tags

NGSS.MS-PS4-3

Cassette tape records often include extra pops and noise. Digital recordings only include the actual recorded sound. Which statement is the best conclusion based on these facts?

• Digital recordings are less expensive to produce than the older method.

• Digital recordings can be transmitted faster than the older method.

• Digital recordings are more reliable than the older method.

• Digital recordings require less space than the older method.

Tags

NGSS.MS-PS4-3

"information broken into numbered pieces to reassemble faster" , digital or analog ?

• Digital

• Analog

Tags

NGSS.MS-PS4-3

"can transmit information faster" digital or analog?

• Digital

• Analog

Tags

NGSS.MS-PS4-3

"cheaper equipment", digital or analog ?

• Digital

• Analog