Wireless Signal Waves

Wireless Communication

8th Grade Science

Ms. Reid

Open Ended

What do you think is a cell phone's most important job?

Broadcasting

• Charged PARTICLES inside ANTENNAS produce radio waves. 

• Radio waves CARRY INFORMATION from the antenna of a broadcasting station to the RECEIVING antenna of your radio. 

Multiple Choice

Which property of AM frequencies allow them to travel over long distances?

• long wavelength

• high amplitude

• constant velocity

• high energy

Open Ended

Why do we use FM radio waves more often than AM waves signals?

Multiple Choice

Which of the following does NOT use radio frequencies?

• radio stations

• taxi cabs

• police radios

• racecar drivers

Multiple Choice

Which type of waves do cell phones use?

• Radio waves

• Infrared waves

• Microwaves

• Telephonial

Fill in the Blanks

When you make a call, your cell phone sends out waves tagged with your

.

Fill in the Blanks

Communications satellites receive signals and then relay those signals to different kinds of

on Earth.

Open Ended

What is the purpose of a satellite dish?

Multiple Select

Which of the following can submit signals to satellites? (Select all that apply.)

Fill in the Blanks

GPS satellites work together to provide the exact

of someone on Earth with a GPS receiver.

Multiple Choice

How many signals are used to determine your location with GPS?

• 24

• 12

• 1

• 4