Communications

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

Which of the following best describes how wireless telephones are able to receive and produce sound from one person to another?

• Electromagnetic waves are received and then vibrate a speaker which produces sound waves.

• Sound waves are received and then vibrate a speaker which produces additional sound waves.

• Electromagnetic waves are received and then vibrate a speaker which produces additional electromagnetic waves.

• Sound waves are received and then vibrate a speaker which produces electromagnetic waves

Tags

NGSS.MS-PS4-2

Scientists on Earth are able to communicate with rovers on Mars through their receivers, which can receive and process signals. Which of these best describes the signals sent and received by rovers?

• sound waves

• electromagnetic waves

• potential energy

• gravitational energy

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

The Global Positioning System, or GPS, uses a network of satellites that orbit the Earth to calculate and track locations. Which of the following best describes the signals sent and received by satellites?

• electromagnetic waves

• gravitational energy

• sound waves

• potential energy

Tags

NGSS.MS-PS4-2

To pass something from one place to another.

• digitized information

• transmit

• decode

Tags

NGSS.MS-PS4-3

The type of wave with a wavelength of 8.76 x 10²

Tags

NGSS.MS-PS4-1

Which type of radiation has a frequency closest to 10⁵?

• Radio

• Infrared

• Ultraviolet

• X-Ray

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Which property of AM frequencies allow them to travel over long distances?

• long wavelength

• high amplitude

• constant velocity

• high energy

Tags

NGSS.MS-PS4-1

Why do we use FM radio waves more often than AM waves signals?

Tags

NGSS.MS-PS4-1

Which type of waves do cell phones use?

• Radio waves

• Infrared waves

• Microwaves

• Telephonial

Tags

NGSS.HS-PS4-5