Patterns & Codes for Information
Generate and compare multiple solutions that use patterns to transfer information, such as codes and signals
What a learner can do afterwards
- Describe at least two systems that use patterns of light or sound to transfer information (e.g. Morse code, semaphore, drum signals)
- Design a simple code using light or sound patterns to send a message
- Compare the advantages and disadvantages of different information transfer methods
The lesson
You already know that light and sound can carry messages. People have used that idea to build real codes: patterns that stand for letters and words.
Samuel Morse turned each letter into a pattern of short and long signals: dots and dashes. Three dots, three dashes, three dots means SOS, the message ships send when they need help.
Drums work differently. Villages sent patterns of beats that travel through the air over long distances, even when it is too dark to see a flag or too far to hear a shout.
Light codes need a clear view. Sound codes work in the dark or through walls but need a quiet place to listen. Comparing systems helps you pick the one that fits where you are.
Codes turn patterns of light or sound into letters, and different codes work best in different places.
Watch it
Where it sits
This opens up
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.