---
title: "Patterns & Codes for Information"
description: "Generate and compare multiple solutions that use patterns to transfer information, such as codes and signals"
canonical: https://lightmysky.com/learn/science/patterns-and-codes-for-information-mt_n5_Jt4ExUd
source: https://lightmysky.com/learn/science/patterns-and-codes-for-information-mt_n5_Jt4ExUd.md
retrieved: 2026-10-19
---

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# Patterns & Codes for Information

Generate and compare multiple solutions that use patterns to transfer information, such as codes and signals

Subject: Science · Area: Waves, Light & Sound · Ages 9 to 10
Page: https://lightmysky.com/learn/science/patterns-and-codes-for-information-mt_n5_Jt4ExUd

## Ready when they can

- 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

## Lesson: Codes and signals: patterns that carry messages

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.

**Example.** 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.

*(drawing: Sailors used flags held in different positions. Each pattern stands for a letter, so a ship far away can read the message without hearing a single sound.)*

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.

**Tip.** 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.

**Recap.** Codes turn patterns of light or sound into letters, and different codes work best in different places.

## Practice

8 questions on this page, each with its working shown.

## Needs first

- [Waves & how they move](https://lightmysky.com/learn/science/waves-and-how-they-move-mt_ph4xZVMiVq)
- [Communication with Light & Sound](https://lightmysky.com/learn/science/communication-with-light-and-sound-mt_ZL9qVVnpwN)

## Opens up

- [Analog and Digital Signals](https://lightmysky.com/learn/science/analog-and-digital-signals-mt_gg5-bUckYX)