The Secret History of Symbols and Codes: Vocabulary

1. Ancient Egyptians used pictures called (a)   to represent words and ideas in their writing system.

1. A (a)   is a hidden message that needs to be decoded, often used for secret communication.

1. Codes can be created by replacing letters with different symbols, a process called (a)   .

1. People who study and break codes are called (a)   .

1. Early sailors used signals with flags, called (a)   , to communicate with other ships.

1. Morse code uses a series of dots and dashes, known as (a)   , to represent letters and numbers.

1. Some symbols have a (a)   meaning, like a red rose representing love.

1. Understanding (a)   symbols, like a skull and crossbones for poison, can keep us safe.

1. Ancient civilizations may have used (a)   , like constellations in the night sky, to tell stories and share information.

1. Learning about the history of symbols and codes can help us appreciate the (a)   ways humans have communicated throughout history.