Information Technologies Quiz Lesson 1

What is a signal?

• A piece of information communicated through the senses

• A type of food

• A type of transportation

• A type of animal

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NGSS.MS-PS4-3

What is needed for a signal to be understood?

• The information is encoded and then sent

• The information is modulated and varied

• The information is stored and transmitted

• The information is received and interpreted

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How are signals transmitted long distances?

• By using vocal cords to speak loudly

• By encoding signals in Morse code and binary

• Using electromagnetic waves such as radio waves, microwaves, or light waves

• By sending signals through physical objects

Tags

NGSS.MS-PS4-3

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What is an advantage of using waves to transmit information?

• They require physical contact between sender and receiver

• They are easily affected by noise

• They do not permanently move matter

• They lose energy as they travel

Tags

NGSS.MS-PS4-3

What happens to signals as they are transmitted?

• They lose energy due to modulation

• They can be affected by noise and interference

• They become stronger as they travel

• They remain crystal clear at all times

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NGSS.MS-PS4-3

NGSS.MS-PS4-2

How can electromagnetic waves be modulated to contain information?

• By changing the wave's amplitude or frequency

• By increasing the wave's speed

• By reducing the wave's energy

• By using physical objects as carriers

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NGSS.MS-PS4-1

What is an advantage of using electromagnetic waves for communication?

• They travel very fast

• They require physical contact between sender and receiver

• They lose energy as they travel

• They are easily affected by noise

Tags

NGSS.MS-PS4-3

Which best explains why the receiver of a signal must understand the code or language being

used?

• This allows the signal to be decoded.

• This allows the signal to be transmitted.

• This allows the signal to be converted to binary.

• This allows the signal to be encoded.

Tags

NGSS.MS-PS4-3

Light waves stay inside an optical fiber as they are transmitted because the ________.

• light waves curve to follow the path of the fiber

• fiber is insulated to prevent loss of thermal energy

• fiber reflects the light back into the core

• fiber is perfectly straight

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NGSS.MS-PS4-2

Electronic signals can travel very long distances in ................................................fibers, due to total

internal reflection.