Digital and Analog Signal Retake

a representation of the information that is communicated

• digital signal

• signal

• analog signal

• machine

Tags

NGSS.MS-PS4-3

a way of representing information using only two options

• analog signal

• digital signal

• computer

• binary

Tags

NGSS.MS-PS4-3

electronic device that receives data, processes data, stores data, and produces a result

• computer

• machine

• noise

• analog signal

Tags

NGSS.MS-ETS1-4

an electric signal whose values change between two values

• binary

• digital signal

• machine

• analog signal

Tags

NGSS.MS-PS4-3

the unwanted modification of a signal

• noise

• binary

• machine

• digital signal

Tags

NGSS.MS-PS4-3

Which correctly orders the steps of communication using signals?

• transmit, decode, encode

• decode, transmit, encode

• transmit, encode, decode

• encode, transmit, decode

Which is an example of a signal being encoded?

• writing a word in Morse code

• hearing sound from a radio

• reading braille

• receiving an email

Tags

NGSS.MS-PS4-3

Which is false about fiber optic cables?

• they can send signals a long distance without the signals degrading

• the glass fiber is highly absorbent

• the cladding causes the light to reflect

• they rely on total internal reflection to transmit signals

Tags

NGSS.MS-PS4-2

A light ray stays inside an optical fiber due to wave behaviors. Which behavior is not associated with optical fibers?

• transmission

• reflection

• refraction

• diffraction

Tags

NGSS.MS-PS4-2

Which is a characteristic of electromagnetic waves that make them useful for transmitting signals?

• they travel very fast

• they do not need a medium through which to travel

• they can be easily modulated

• all the above

Tags

NGSS.MS-PS4-3