Binary Patterns: Creating Secret Codes

Learning Objectives Explain that computers use a special language called binary made of 0s and 1s. Identify that a single 0 or 1 is called a 'bit'. Represent small numbers (0-7) using a 3-bit binary pattern. Decode a simple word written in binary using a provided key. Encode a simple letter into binary using a provided key. Create their own secret code by assigning binary patterns to letters or pictures. Recognize that changing a single bit (a 0 or 1) changes the meaning of the code. Ever wanted to send a secret message that only your friend and a computer can read? 🤫 Let's learn how! We are going to learn about binary, the secret language of computers that is made of only two numbers: 0 and 1! You will discover how these simple numbers can stand for lette...

TermDefinitionExample BinaryA language that uses only two symbols, 0 and 1, to represent information for computers.The number 5 in binary is written as the pattern `101`. BitA single binary digit, which can be either a 0 or a 1. It's the smallest piece of computer information.In the binary code `101`, the `1` is a bit, the `0` is a bit, and the last `1` is a bit. There are 3 bits in total. PatternA group of 0s and 1s that are arranged in a specific order to mean something.The pattern `010` might mean the letter 'B' in a secret code. CodeA set of rules used to change information into a secret form.A code where the letter 'A' is represented by the binary pattern `001`. EncodeTo change a regular message into a secret code.Encoding the letter 'C' into the bi...

The On/Off Rule 1 = ON, 0 = OFF Think of a light switch. Computers use these 'on' and 'off' signals to understand everything. A '1' means there is electricity, and a '0' means there is no electricity. The Secret Key Rule Letter = Binary Pattern To create or read a secret code, you need a key! A key is a chart that tells everyone which pattern of 0s and 1s matches which letter. Everyone must use the same key to understand the messages. The Order Matters Rule Read patterns from left to right. The order of the 0s and 1s is very important. The pattern `100` is completely different from `001`, just like the word 'cat' is different from 'act'.