Why Some AM Radio Stations Don't Work at Night

What are the two types of broadcast radio?

• AM and FM

• AM and PM

• FM and PM

• AM and EM

Tags

8.PS4.3

Why do AM radio waves travel further at night?

• Because the ionosphere disappears at night

• Because FM radio waves bounce off the ionosphere at night

• Because the sun gives off more radiation at night

• Because the wavelength of AM radio waves is longer

Tags

8.PS4.3

What is the wavelength of a station broadcasting at 1000 AM?

• 300 meters

• 3 meters

• 1000 meters

• 100 meters

Tags

8.PS4.3

Why can FM radio only be picked up within line-of-sight of the broadcast tower?

• Because FM radio waves are absorbed by the ionosphere

• Because FM radio waves are too short to travel long distances

• Because FM radio waves are blocked by buildings and obstacles

• Because FM radio waves are only transmitted during the day

Tags

8.PS4.3

What happens to the broadcasting hours of daytime-only stations during winter?

• They increase

• They decrease

• They remain the same

• They become unpredictable

Tags

8.PS4.3

How many AM radio frequencies are there in the US?

• 116

• 540

• 1700

• Thousands

Tags

8.PS4.3

What is the purpose of clear-channel status for certain frequencies?

• To allow stations to broadcast at full power all the time

• To prevent interference between AM and FM radio stations

• To limit the number of AM radio stations in a specific area

• To increase the range of FM radio waves at night

Tags

8.PS4.3

Which two stations have clear-channel status on 1000 AM in the US?

• KOMO in Seattle and KMVP in Chicago

• WCCD in Parma and KSOO in Sioux Falls

• KOMO in Seattle and WCCD in Parma

• KMVP in Chicago and KSOO in Sioux Falls

Tags

8.PS4.3

What is the range of an AM radio station in New York during the day?

• 100 miles

• 40-600 miles

• Thousands of miles

• Coast to coast

Tags

8.PS4.3

What is the main advantage of FM radio over AM radio?

• Higher quality transmission

• Longer range

• Lower frequency

• Better nighttime broadcasting

Tags

8.PS4.3