Capturing and Transmitting Information and Energy

What type of wave is used by cell phones to transmit digital signals?

• Sound waves

• Light waves

• Microwaves

• Gamma rays

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NGSS.HS-PS4-3

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What is the purpose of a transmitter in communication?

• To decode incoming signals

• To block noise from signals

• To encode and prepare signals for transmission

• To receive radio waves from satellites

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NGSS.HS-PS4-5

Which of the following best describes how a satellite transmits information?

• It prints out physical data and drops it to Earth

• It reflects sunlight to carry messages

• It radiates data signals through antenna oscillations

• It sends messages through underground cables

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NGSS.HS-PS4-3

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When a signal is transmitted wirelessly, which medium is most commonly used?

• Water

• Air

• Metal rods

• Concrete

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NGSS.HS-PS4-5

Cell phones convert sound into digital signals before transmission.

• true

• false

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NGSS.HS-PS4-2

NGSS.HS-PS4-5

Satellites and cell phones both rely on wave signals to transmit information.

• true

• false

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NGSS.HS-PS4-5

Transmitters cannot be used to send data through wires.

• true

• false

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What happens to information before it is transmitted from a cell phone?

• It is printed and mailed

• It is encrypted with a password

• It is converted into a digital signal

• It is stored in a SIM card

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NGSS.HS-PS4-2

What is one role of a transmitter in a communication system?

• To delete outdated data

• To convert sound into electricity

• To encode data for transmission

• To monitor signal strength

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NGSS.HS-PS4-5

Which of the following encode information in a format that is suitable for a transmission medium?

• Transmitters

• Signal integrity

• Signal converters

• Transducers

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NGSS.HS-PS4-2

NGSS.HS-PS4-5