Waves and Technology

What property of an electromagnetic wave changes when the wave is encoded with analog information?

• speed

• amplitude

• frequency

• wavelength

Tags

NGSS.MS-PS4-3

What is one reason digital signals are considered more reliable than analog?

• Digital signals can be used by more people.

• Digital signals can be designed to reduce noise.

• Digital signals can be coded and decoded easily.

• Digital signals can be carried over long distances.

Tags

NGSS.MS-PS4-3

What is one reason that electromagnetic waves are used in long-distance communication?

• They travel rapidly.

• They move matter easily.

• They do not lose energy over long distances.

• Information can be encoded in the wave speed.

Tags

NGSS.MS-PS4-3

An engineer is designing a device that sends and stores information. He decides using digital information is better than analog. What is one reason he would decide this?

• Digital signals have less noise.

• Digital signals are easier for people to understand.

• Digital signals do not change when they are stored.

• Digital signals do not need special equipment to be decoded

Tags

NGSS.MS-PS4-3

What property of the wave is represented by the letter "B"?

• amplitude

• crest

• trough

• wavelength

Tags

NGSS.MS-PS4-1

Which vocabulary term is used to identify the distance between points C & G?

• Amplitude

• Crest

• Frequency

• Wavelength

Tags

NGSS.MS-PS4-1

When the frequency of a wave increases, what happens to the wavelength?

• The wavelength is not directly affected by the frequency of a wave.

• The wavelength increases.

• The wavelength decreases.

• More specific information is needed to form a conclusion about the wavelength.

Tags

NGSS.HS-PS4-1

Which letter(s) represent the trough of the wave?

• A

• B & D

• D

• C & G

Tags

NGSS.MS-PS4-1

Which letter(s) represent the crest of the wave?

• A

• B & D

• B & F

• F

Tags

NGSS.MS-PS4-1

The units for frequency are measured in _____________.

• hertz

• seconds

• m/s

• m

Tags

NGSS.MS-PS4-1