Broadcasting

High school (ages 12+)
People & Society

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/broadcasting

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the scientific principle?Utilizes electromagnetic waves within specific frequency bands
2. What is the pioneering technology?Wireless telegraphy, leading to radio and television
3. How did broadcasting begin?It started with Guglielmo Marconi sending Morse code across the ocean in 1901, showing that long‑distance wireless messages were possible.
4. Why is broadcasting important for news and emergencies?Broadcasting shares news quickly, helps people know what’s happening, and can send emergency alerts to keep everyone safe during crises.

Electromagnetic Spectrum: The range of all electromagnetic radiation, including radio waves, microwaves, visible light, and X-rays.
Modulation: The process of encoding information onto a carrier wave for transmission.
Demodulation: The process of extracting information from a carrier wave at the receiving end.
Spectrum Efficiency: The measure of how effectively a communication system uses available radio frequencies.