Wireless communication

AM signals changes

• signals

• amplitude

• frequency

• both amplitude and frequency

The ............ of FM if constant

• frequency

• amplitude

• Nothing

• radio

Radio waves are used in communications

• True

• False

Order the sequence of how a radio waves work.

a) radio waves strike your radio's antenna and are picked up

b) In the interior of the radio, radio waves are converted into an electronic signals

c)At the radio station, electronics convert music into radio waves that are then broadcast by a large antenna

d)the electronic signals comes out of your radio as sound.

• c,a,b,d

• b,c,a,d

• c,d,b,c

• a,b,c,d

Cell phones transmit and receive signals using...........

• wavelength

• x-rays

• high-frequency microwaves

• depending on the situation

How do satellite communication work?

• They travel around Earth

• They use whatsapp to work

• They send signals to clouds

• They receive telephone signals and relay the signals to receivers in Earth

Which type of wave is this?

• AM

• FM

• Visible light

• Gamma rays

What do all satellite communications have in common?

• They all determine your place in Earth

• They all work by using a phone

• They all work like receivers and transmitters

• They all have T.V shows.

AM waves have higher frequencies and and more energy than FM

• True

• False

What is Earth's ionosphere?

• A place of oxygen

• a region of charged particles high in the atmosphere

• Wavelength and frequency

• a place used in carrying signals