Communication and Waves - 2.1

Different frequencies of radio waves are used by communication devices. Information is considered as equivalent to each specific _______________________ at the receiving end.

• signal

• frequency

• communication

Sound waves were used in ______________________ to communicate in Morse code.

• telegraphs

• telephones

• televisions

Which of the following would be considered a code?

• radioactive wave

• light wave

• smoke signal

Which of the following is a process by which information is exchanged between individuals?

• communication

• electricity

• alternating current

Which of the following is a type of wave that is common in communication devices that we use today?

• sound

• longitudinal

• electromagnetic

Early communication devices were created for which of the following reasons?

• to be social with friends in town

• to speak in different languages

• to communicate over a long distance

On AM broadcasts, what remains constant?

• the amplitude

• the frequency

• the music

• the speech

FM signals travel as changes in...

• the speed of the wave.

• the frequency of the wave.

• the amplitude of the wave.

• the loudness of the wave.

Which waves can reach great distances (Waves go into atmosphere and reflect back to Earth so that can move around the curvature of Earth)? 

• FM
• AM
• Radio 
• Microwaves 

How do FM waves travel?

• As changes in the frequency of the wave
• As changes in the amplitude of the wave
• As changes in the wavelength of the wave
• As changes in the resonance of the wave