Information Technology

Analog signals are _____________ affected by noise than digital signals.

• more

• less

• similarly

• not

Tags

NGSS.MS-PS4-3

Which does NOT help explain why digital signals are more reliable than analog signals?

• Noise is more easily filtered from digital signals.

• Digital signals are smooth and continuous.

• Digital signals consist of two values only

• Analog signals deteriorate due to noise.

Tags

NGSS.MS-PS4-3

Computers use digital information that is encoded as _________numbers.

• real

• binary

• boolean

• positive

Digital signals ____________

• can only be stored on computers

• consist of only two values

• cannot be transmitted by light waves

• are what is stored by camera film

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

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.

Tags

NGSS.MS-PS4-3

What is a disadvantage of using radio waves to transmit information?

• They do not permanently move matter

• They can travel over long distances.

• They can be varied to hold information.

• They lose energy as they travel through mediums.

Tags

NGSS.MS-PS4-3

How does noise affect a signal?

• It causes the signal to deteriorate.

• It amplifies the signal.

• It allows the signal to travel further.

• It changes the signal as it moves from one medium to another.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which correctly orders the steps of communication using signals?

• encode, transmit, decode

• transmit, encode, decode

• decode, transmit, encode

• transmit, decode, encode

Tags

NGSS.MS-PS4-3

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

• sound waves

• light waves

• radio waves

• microwaves

Tags

NGSS.MS-PS4-3