Lesson Check: Communicating With Signals

Sign language and written language are examples of signals used to communicate.

• True

• False

Before a signal is sent, it must be decoded.

• True

• False

Tags

NGSS.MS-PS4-3

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

• optical

• copper

• plastic

• carbon

Tags

NGSS.MS-PS4-2

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-PS4-2

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

Identify three devices that were developed to send or receive signals carried by electromagnetic waves.

• Radio

• Television

• Mobile Phone

• Microwave Oven

Tags

NGSS.MS-PS4-3

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

• sound waves

• light waves

• radio waves

• microwaves

Tags

NGSS.MS-PS4-3

Electromagnetic waves are useful for transmitting signals because they have three characteristics. Which of the following is NOT one of those characteristics?

• They can travel long distances without losing strength.

• They can carry a large amount of data.

• They are easily absorbed by obstacles.

• They can travel through a vacuum.

Tags

NGSS.MS-PS4-3