Waves Test Review

An echo is an example of

• Reflection

• a type of musical instrument
• a form of light
• Refraction

Tags

NGSS.MS-PS4-2

In the sun a white shirt is cooler than a black shirt because

• A white shirt absorbs more heat than a white shirt.

• A white shirt reflects sunlight better than a black shirt.
• A black shirt is designed for cooler temperatures than a white shirt.

The following diagram shows a driver who could see the image of a vehicle behind him without turning his back.

Why?

• Light travels in a straight line

• Light is refracted

• Light is reflected

• Light travels in two different mediums

Tags

NGSS.MS-PS4-2

Old televisions had an antenna that received an analog signal. Newer televisions have a built in converter box and receive a digital signal. The old analog signal was a continuous wave. Digital signals

• Digital signals are like a code, written in 0s and 1s.

• Digital signals can be received without a converter box.
• Analog signals are more efficient than digital signals.

Tags

NGSS.MS-PS4-3

A sound that has been reflected off a surface

• Pitch

• Amplitude

• Frequency

• Echo

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NGSS.MS-PS4-2

Look at this image, what is this an example of ?

• Convection

• Diffraction

• Reflection

• Refraction

What type waves do TV remotes use to communicate with the television and change channels?

• Radio waves
• Ultrasound waves
• Microwaves
• Infrared (IR) waves

This signal is a continuous signal

• Analog

• Digital

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NGSS.MS-PS4-3

Used in cell phones

• Analog

• Digital

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NGSS.MS-PS4-3

Why are digital signals considered more reliable than analog signals for long-distance communication?

• They are less susceptible to interference and noise.

• They can travel faster than analog signals.

• They are easier to convert into analog signals.

Tags

NGSS.MS-PS4-3