Electrical telegraph

High school (ages 12+)
Science & Technology

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/electrical-telegraph

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 core technology?Point-to-point communication via electrical signals sent over wires
2. What is the global reach?Submarine telegraph cables enabled intercontinental communication starting in 1850
3. What is the electrical telegraph and why was it important?It was the first system that used electricity and wires to send messages quickly over long distances, breaking the limits of old ways of sending letters.
4. How did the telegraph send messages?It used electric signals that moved a needle or made a sounder click, and those signals were read as letters or Morse code.

Telecommunications: The transmission of information over significant distances by means of electronic signals and electromagnetic waves.
Electromagnetism: The interaction of electric currents or fields and magnetic fields, fundamental to telegraph operation.
Morse Code: A method of transmitting text as a series of two-element signals, typically short and long marks (dots and dashes).
Semaphore: An optical telegraph system using flags or arms to signal messages, largely replaced by electrical telegraphy.