Wave Communication

It is far more difficult to make a perfect copy of an analog wave because...

• the exact value of any one piece of information is not clearly defined.

• most analog waves have wavelengths that are too long to reproduce in copies.

• analog waves travel at speeds too great for modern technologies to use.

• each individual piece of information is either a zero, a one, or a two.

Tags

NGSS.MS-PS4-3

Why does a music studio likely use digital technology for recording rather than analog technology?

• Digital technology has been used longer than analog technology.

• Digital technology can store information more reliably than analog technology.

• Digital technology produces more background noise in recordings than analog technology.

• Digital technology cannot be changed while analog technology can easily be modified.

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NGSS.MS-PS4-3

Which of these statements best describes how digital data compares to analog data?

• Digital data takes more space to store than analog does.

• Digital data records more unwanted background noise than analog does.

• Digital data can be stored for a longer period of time than analog can.

• Digital data transmits signals more slowly than analog can.

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NGSS.MS-PS4-3

How is the information from the audio wave stored after it is processed by the analog-to-digital converter?

• It is stored as a table of ones and twos because it was converted to a radio wave.

• It is stored as images because it was converted to mathematical equations.

• It is stored as a series of ones and zeros because it was converted to binary data.

• It is stored as graphs because it was converted to base ten data.

Remote controls enable users to adjust the volume and channel of televisions without having to touch the television. Which of these best describes the signals sent by remote controls to televisions?

• potential energy

• sound waves

• electromagnetic waves

• gravitational energy

Tags

NGSS.MS-PS4-3

Why do people see distant events before they hear them?

• Light travels faster than sound.

• Sound travels faster than light.

• Human eyes are more sensitive than human ears.

• Human brains can only process events in that order.

Both analog and digital waves can experience noise as they travel. Noise is any unwanted signal that distorts or reshapes the original wave. The diagram below illustrates how the resulting waves might appear. The example above suggests that...

• digital waves cannot have noise or other distortions removed from them.

• there is no clear advantage to transmitting digital waves over analog waves.

• analog waves do not experience as much noise as digital waves.

• noise is less of a problem for digital waves than for analog waves.

Tags

NGSS.MS-PS4-3

Which of the following statements best explains why digital waves are commonly used in high-frequency wireless networks instead of analog waves?

• Small disruptions in analog waves are more easily corrected than in digital waves.

• It is easier to correct small disruptions in digital waves than in analog waves.

• Analog waves cannot reach large enough wavelengths to be used in wireless networks.

• Analog waves cannot reach high enough amplitudes to be used in wireless networks.

Tags

NGSS.MS-PS4-3

A wave with a large wavelength will have a ______ frequency and _____ energy

• high, low
• high, high
• low, high
• low, low

Tags

NGSS.MS-PS4-1

What type of wave is pictured?

• Longitudinal
• Transverse
• Light
• Standing

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NGSS.MS-PS4-1