Communication and Waves

Radios, televisions, cell phones, and wireless computer networks are examples of technologies that benefit humans. How are they beneficial?

• They transmit and receive signals with zero percentage loss.

• They use signals that do not require mediums to travel.

• They relay information without direct human interaction

• They use low-energy radio signals.

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NGSS.MS-PS4-3

Which is incorrect about cell phone technology.

• Cell phones use radio signals.

• Cell phones send and receive signals without mediums.

• Cell phones transfer information with transmitters and receivers.

• Cell phones transfer large amounts of data that cannot be stored.

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Why is the use of high-frequency radio waves a beneficial technological advancement for humans?

• They have the shortest wavelengths.

• They carry more information.

• They travel longer distances.

• They do not require mediums to transmit.

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Which features of digital communication are correct?

• Digital signals carry less information per second.

• Information can be stored for future recovery.

• Digital signals can be transmitted over long distances.

• Signal loss happens less frequently.

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NGSS.MS-PS4-3

What do all signals that are used to communicate have in common?

• They all involve light waves

• They all send information

• They all use printed words

• They all use a series of sounds

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NGSS.MS-PS4-3

Which of the following does NOT send or receive signals carried by electromagnetic waves

• cell phone

• radio

• talking in person

• garage door opener

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NGSS.MS-PS4-3

The following is the graph of ___________________________

• An analog signal

• A digital signal

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All of the following are types of electromagnetic waves that can be used to transmit signals except ________________.

• sound waves

• light waves

• radio waves

• microwaves

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NGSS.MS-PS4-3

The following is the graph of ___________________________

• An analog signal

• A digital signal

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NGSS.MS-PS4-3

Which is the best model of an analog signal?

• a smooth wave

• a light switch going on and off

• a series of 1’s and 0’s

• a series of pulses

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