Communication 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

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.)

Multiple Choice

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

• 24

• 12

• 1

• 4